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* ftrace: fix !CONFIG_FTRACE [un_]register_ftrace_command() prototypesIngo Molnar2009-02-171-0/+2
| | | | | | Impact: build fix Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'tip/tracing/ftrace' of ↵Ingo Molnar2009-02-172-0/+42
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
| * ftrace: add pretty print to selected fuction tracesSteven Rostedt2009-02-161-0/+6
| | | | | | | | | | | | | | | | This patch adds a call back for the tracers that have hooks to selected functions. This allows the tracer to show better output in the set_ftrace_filter file. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * ring-buffer: add tracing_is_on to test if ring buffer is enabledSteven Rostedt2009-02-161-0/+2
| | | | | | | | | | | | | | This patch adds the tracing_is_on() interface to tell if the ring buffer is turned on or not. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * ftrace: trace different functions with a different tracerSteven Rostedt2009-02-161-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: new feature Currently, the function tracer only gives you an ability to hook a tracer to all functions being traced. The dynamic function trace allows you to pick and choose which of those functions will be traced, but all functions being traced will call all tracers that registered with the function tracer. This patch adds a new feature that allows a tracer to hook to specific functions, even when all functions are being traced. It allows for different functions to call different tracer hooks. The way this is accomplished is by a special function that will hook to the function tracer and will set up a hash table knowing which tracer hook to call with which function. This is the most general and easiest method to accomplish this. Later, an arch may choose to supply their own method in changing the mcount call of a function to call a different tracer. But that will be an exercise for the future. To register a function: struct ftrace_hook_ops { void (*func)(unsigned long ip, unsigned long parent_ip, void **data); int (*callback)(unsigned long ip, void **data); void (*free)(void **data); }; int register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, void *data); glob is a simple glob to search for the functions to hook. ops is a pointer to the operations (listed below) data is the default data to be passed to the hook functions when traced ops: func is the hook function to call when the functions are traced callback is a callback function that is called when setting up the hash. That is, if the tracer needs to do something special for each function, that is being traced, and wants to give each function its own data. The address of the entry data is passed to this callback, so that the callback may wish to update the entry to whatever it would like. free is a callback for when the entry is freed. In case the tracer allocated any data, it is give the chance to free it. To unregister we have three functions: void unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops, void *data) This will unregister all hooks that match glob, point to ops, and have its data matching data. (note, if glob is NULL, blank or '*', all functions will be tested). void unregister_ftrace_function_hook_func(char *glob, struct ftrace_hook_ops *ops) This will unregister all functions matching glob that has an entry pointing to ops. void unregister_ftrace_function_hook_all(char *glob) This simply unregisters all funcs. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * ftrace: add command interface for function selectionSteven Rostedt2009-02-161-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | Allow for other tracers to add their own commands for function selection. This interface gives a trace the ability to name a command for function selection. Right now it is pretty limited in what it offers, but this is a building step for more features. The :mod: command is converted to this interface and also serves as a template for other implementations. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
* | Merge branch 'tip/tracing/ftrace' of ↵Ingo Molnar2009-02-151-13/+12
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/power-tracer
| * | tracing: convert c/p state power tracer to use tracepointsJason Baron2009-02-131-13/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Convert the c/p state "power" tracer to use tracepoints. Avoids a function call when the tracer is disabled. Signed-off-by: Jason Baron <jbaron@redhat.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
* | | Merge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/coreIngo Molnar2009-02-153-53/+25
|\ \ \ | |_|/ |/| | | | | | | | Conflicts: kernel/trace/trace_mmiotrace.c
| * | Merge branch 'for-linus' of ↵Linus Torvalds2009-02-131-51/+23
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ASoC: Only register AC97 bus if it's not done already ALSA: hda - Add snd_hda_multi_out_dig_cleanup() ALSA: hda - Add missing terminator in slave dig-out array ALSA: hda - Change HP dv7 (103c:30f4) quirk from hp-m4 to hp-dv5 model ALSA: hda - Register (new) devices at reconfig ALSA: mtpav - Fix initial value for input hwport ALSA: hda - add id for Intel IbexPeak integrated HDMI codec ALSA: hda - compute checksum in HDMI audio infoframe ALSA: hda - enable HDMI audio pin out at module loading time ALSA: hda - allow multi-channel HDMI audio playback when ELD is not present ASoC: Update SDP3430 machine driver for snd_soc_card ALSA: hda - Add quirk for Asus z37e (1043:8284) sound: Remove OSSlib stuff from linux/soundcard.h ASoC: WM8990: Fix kcontrol's private value use in put callback ASoC: TLV320AIC3X: Fix kcontrol's private value use in put callback
| | * | sound: Remove OSSlib stuff from linux/soundcard.hArnd Bergmann2009-02-101-51/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removed OSSlib stuff from linux/soundcard.h to fix the warnings for 'make headers_check'. This patch breaks building against OSSlib with the kernel headers instead of its own headers. It should still work with any version of the library from the 2003 onwards which provide their own headers for the latest interface. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2009-02-122-2/+2
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits) wimax: fix oops in wimax_dev_get_by_genl_info() when looking up non-wimax iface net: 4 bytes kernel memory disclosure in SO_BSDCOMPAT gsopt try #2 netxen: fix compile waring "label ‘set_32_bit_mask’ defined but not used" on IA64 platform bnx2: Update version to 1.9.2 and copyright. bnx2: Fix jumbo frames error handling. bnx2: Update 5709 firmware. bnx2: Update 5706/5708 firmware. 3c505: do not set pcb->data.raw beyond its size Documentation/connector/cn_test.c: don't use gfp_any() net: don't use in_atomic() in gfp_any() IRDA: cnt is off by 1 netxen: remove pcie workaround sun3: print when lance_open() fails qlge: bugfix: Add missing rx buf clean index on early exit. qlge: bugfix: Fix RX scaling values. qlge: bugfix: Fix TSO breakage. qlge: bugfix: Add missing dev_kfree_skb_any() call. qlge: bugfix: Add missing put_page() call. qlge: bugfix: Fix fatal error recovery hang. qlge: bugfix: Use netif_receive_skb() and vlan_hwaccel_receive_skb(). ...
| | * | | net: don't use in_atomic() in gfp_any()Andrew Morton2009-02-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The problem is that in_atomic() will return false inside spinlocks if CONFIG_PREEMPT=n. This will lead to deadlockable GFP_KERNEL allocations from spinlocked regions. Secondly, if CONFIG_PREEMPT=y, this bug solves itself because networking will instead use GFP_ATOMIC from this callsite. Hence we won't get the might_sleep() debugging warnings which would have informed us of the buggy callsites. Solve both these problems by switching to in_interrupt(). Now, if someone runs a gfp_any() allocation from inside spinlock we will get the warning if CONFIG_PREEMPT=y. I reviewed all callsites and most of them were too complex for my little brain and none of them documented their interface requirements. I have no idea what this patch will do. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | pkt_sched: type should be __u32 in headerChuck Ebbert2009-02-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using u32 in this header breaks the build of iptables. Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | Merge branch 'tip/tracing/core' of ↵Ingo Molnar2009-02-131-40/+40
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
| * | | | | sched: do not account for NMIsSteven Rostedt2009-02-121-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: avoid corruption in system time accounting Martin Schwidefsky told me that there was an issue with NMIs and system accounting. The problem is that the accounting code is not reentrant, and if an NMI goes off after an interrupt it can corrupt the accounting. For now, the best we can do is to treat NMIs like SMIs and they are not accounted for. This patch changes nmi_enter to not call __irq_enter and to do the preempt-count and tracing calls directly. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * | | | | preempt-count: force hardirq-count to max of 10Steven Rostedt2009-02-121-24/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To add a bit in the preempt_count to be set when in NMI context, we found that some archs did not have enough bits to spare. This is due to the hardirq_count being a mask that can hold NR_IRQS. Some archs allow for over 16000 IRQs, and that would require a mask of 14 bits. The sofitrq mask is 8 bits and the preempt disable mask is also 8 bits. The PREEMP_ACTIVE bit is bit 30, and bit 31 would make the preempt_count (which is type int) a negative number. A negative preempt_count is a sign of failure. Add them up 14+8+8+1+1 you get 32 bits. No room for the NMI bit. But the hardirq_count is to track the number of nested IRQs, not the number of total IRQs. This originally took the paranoid approach of setting the max nesting to NR_IRQS. But when we have archs with over 1000 IRQs, it is not practical to think they will ever all nest on a single CPU. Not to mention that this would most definitely cause a stack overflow. This patch sets a max of 10 bits to be used for IRQ nesting. I did a 'git grep HARDIRQ' to examine all users of HARDIRQ_BITS and HARDIRQ_MASK, and found that making it a max of 10 would not hurt anyone. I did find that the m68k expected it to be 8 bits, so I allow for the archs to set the number to be less than 10. I removed the setting of HARDIRQ_BITS from the archs that set it to more than 10. This includes ALPHA, ia64 and avr32. This will always allow room for the NMI bit, and if we need to allow for NMI nesting, we have 4 bits to play with. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| | | | | |
| \ \ \ \ \
*-. \ \ \ \ \ Merge branches 'tracing/ftrace', 'tracing/ring-buffer', 'tracing/sysprof', ↵Ingo Molnar2009-02-137-57/+73
|\ \ \ \ \ \ \ | | |/ / / / / | |/| / / / / | | |/ / / / | | | | | / | |_|_|_|/ |/| | | | 'tracing/urgent' and 'linus' into tracing/core
| | * | | syscall define: fix uml compile bugHeiko Carstens2009-02-111-14/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the new system call defines we get this on uml: arch/um/sys-i386/built-in.o: In function `sys_call_table': (.rodata+0x308): undefined reference to `sys_sigprocmask' Reason for this is that uml passes the preprocessor option -Dsigprocmask=kernel_sigprocmask to gcc when compiling the kernel. This causes SYSCALL_DEFINE3(sigprocmask, ...) to be expanded to SYSCALL_DEFINEx(3, kernel_sigprocmask, ...) and finally to a system call named sys_kernel_sigprocmask. However sys_sigprocmask is missing because of this. To avoid macro expansion for the system call name just concatenate the name at first define instead of carrying it through severel levels. This was pointed out by Al Viro. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | cgroups: fix lockdep subclasses overflowLi Zefan2009-02-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I enabled all cgroup subsystems when compiling kernel, and then: # mount -t cgroup -o net_cls xxx /mnt # mkdir /mnt/0 This showed up immediately: BUG: MAX_LOCKDEP_SUBCLASSES too low! turning off the locking correctness validator. It's caused by the cgroup hierarchy lock: for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) { struct cgroup_subsys *ss = subsys[i]; if (ss->root == root) mutex_lock_nested(&ss->hierarchy_mutex, i); } Now we have 9 cgroup subsystems, and the above 'i' for net_cls is 8, but MAX_LOCKDEP_SUBCLASSES is 8. This patch uses different lockdep keys for different subsystems. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2009-02-112-36/+39
| | |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers: fix TIMER_ABSTIME for process wide cpu timers timers: split process wide cpu clocks/timers, fix x86: clean up hpet timer reinit timers: split process wide cpu clocks/timers, remove spurious warning timers: split process wide cpu clocks/timers signal: re-add dead task accumulation stats. x86: fix hpet timer reinit for x86_64 sched: fix nohz load balancer on cpu offline
| | | * | | timers: fix TIMER_ABSTIME for process wide cpu timersPeter Zijlstra2009-02-111-12/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The POSIX timer interface allows for absolute time expiry values through the TIMER_ABSTIME flag, therefore we have to synchronize the timer to the clock every time we start it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | timers: split process wide cpu clocks/timers, fixPeter Zijlstra2009-02-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To decrease the chance of a missed enable, always enable the timer when we sample it, we'll always disable it when we find that there are no active timers in the jiffy tick. This fixes a flood of warnings reported by Mike Galbraith. Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | timers: split process wide cpu clocks/timers, remove spurious warningIngo Molnar2009-02-061-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mike Galbraith reported that the new warning in thread_group_cputimer() triggers en masse with Amarok running. Oleg Nesterov observed: Can't fastpath_timer_check()->thread_group_cputimer() have the false warning too? Suppose we had the timer, then posix_cpu_timer_del() removes this timer, but task_cputime_zero(&sig->cputime_expires) still not true. Remove the spurious debug warning. Reported-by: Mike Galbraith <efault@gmx.de> Explained-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | timers: split process wide cpu clocks/timersPeter Zijlstra2009-02-052-29/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change the process wide cpu timers/clocks so that we: 1) don't mess up the kernel with too many threads, 2) don't have a per-cpu allocation for each process, 3) have no impact when not used. In order to accomplish this we're going to split it into two parts: - clocks; which can take all the time they want since they run from user context -- ie. sys_clock_gettime(CLOCK_PROCESS_CPUTIME_ID) - timers; which need constant time sampling but since they're explicity used, the user can pay the overhead. The clock readout will go back to a full sum of the thread group, while the timers will run of a global 'clock' that only runs when needed, so only programs that make use of the facility pay the price. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Reviewed-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | signal: re-add dead task accumulation stats.Peter Zijlstra2009-02-051-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're going to split the process wide cpu accounting into two parts: - clocks; which can take all the time they want since they run from user context. - timers; which need constant time tracing but can affort the overhead because they're default off -- and rare. The clock readout will go back to a full sum of the thread group, for this we need to re-add the exit stats that were removed in the initial itimer rework (f06febc9: timers: fix itimer/many thread hang). Furthermore, since that full sum can be rather slow for large thread groups and we have the complete dead task stats, revert the do_notify_parent time computation. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Reviewed-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | hugetlbfs: fix build failure with !CONFIG_HUGETLBFSStefan Richter2009-02-101-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix regression due to 5a6fe125950676015f5108fb71b2a67441755003, "Do not account for the address space used by hugetlbfs using VM_ACCOUNT" which added an argument to the function hugetlb_file_setup() but not to the macro hugetlb_file_setup(). Reported-by: Chris Clayton <chris2553@googlemail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2009-02-101-0/+12
| | |\ \ \ \ | | | | |/ / | | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (23 commits) bridge: Fix LRO crash with tun IPv6: fix to set device name when new IPv6 over IPv6 tunnel device is created. gianfar: Fix boot hangs while bringing up gianfar ethernet netfilter: xt_sctp: sctp chunk mapping doesn't work netfilter: ctnetlink: fix echo if not subscribed to any multicast group netfilter: ctnetlink: allow changing NAT sequence adjustment in creation netfilter: nf_conntrack_ipv6: don't track ICMPv6 negotiation message netfilter: fix tuple inversion for Node information request netxen: fix msi-x interrupt handling de2104x: force correct order when writing to rx ring tun: Fix unicast filter overflow drivers/isdn: introduce missing kfree drivers/atm: introduce missing kfree sunhme: Don't match PCI devices in SBUS probe. 9p: fix endian issues [attempt 3] net_dma: call dmaengine_get only if NET_DMA enabled 3c509: Fix resume from hibernation for PnP mode. sungem: Soft lockup in sungem on Netra AC200 when switching interface up RxRPC: Fix a potential NULL dereference r8169: Don't update statistics counters when interface is down ...
| | | * | | net_dma: call dmaengine_get only if NET_DMA enabledDavid S. Miller2009-02-061-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based upon a patch from Atsushi Nemoto <anemo@mba.ocn.ne.jp> -------------------- The commit 649274d993212e7c23c0cb734572c2311c200872 ("net_dma: acquire/release dma channels on ifup/ifdown") added unconditional call of dmaengine_get() to net_dma. The API should be called only if NET_DMA was enabled. -------------------- Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Dan Williams <dan.j.williams@intel.com>
| | * | | | Do not account for the address space used by hugetlbfs using VM_ACCOUNTMel Gorman2009-02-102-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When overcommit is disabled, the core VM accounts for pages used by anonymous shared, private mappings and special mappings. It keeps track of VMAs that should be accounted for with VM_ACCOUNT and VMAs that never had a reserve with VM_NORESERVE. Overcommit for hugetlbfs is much riskier than overcommit for base pages due to contiguity requirements. It avoids overcommiting on both shared and private mappings using reservation counters that are checked and updated during mmap(). This ensures (within limits) that hugepages exist in the future when faults occurs or it is too easy to applications to be SIGKILLed. As hugetlbfs makes its own reservations of a different unit to the base page size, VM_ACCOUNT should never be set. Even if the units were correct, we would double account for the usage in the core VM and hugetlbfs. VM_NORESERVE may be set because an application can request no reserves be made for hugetlbfs at the risk of getting killed later. With commit fc8744adc870a8d4366908221508bb113d8b72ee, VM_NORESERVE and VM_ACCOUNT are getting unconditionally set for hugetlbfs-backed mappings. This breaks the accounting for both the core VM and hugetlbfs, can trigger an OOM storm when hugepage pools are too small lockups and corrupted counters otherwise are used. This patch brings hugetlbfs more in line with how the core VM treats VM_NORESERVE but prevents VM_ACCOUNT being set. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | Merge branch 'tip/tracing/ftrace' of ↵Ingo Molnar2009-02-111-1/+1
|\ \ \ \ \ \ | |/ / / / / |/| | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
| * | | | | tracing: fix typos in commentsWenji Huang2009-02-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: clean up. Fix typos in the comments. Signed-off-by: Wenji Huang <wenji.huang@oracle.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
* | | | | | Merge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/coreIngo Molnar2009-02-104-2/+14
|\ \ \ \ \ \ | |/ / / / / |/| / / / / | |/ / / /
| * | | | Merge branch 'drm-fixes' of ↵Linus Torvalds2009-02-091-0/+2
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/i915: select framebuffer support automatically drm/i915: add get_vblank_counter function for GM45 drm/i915: capture last_vblank count at IRQ uninstall time too drm/i915: Unlock mutex on i915_gem_fault() error path drm/i915: Quiet the message on get/setparam ioctl with an unknown value. drm/i915: skip LVDS initialization on Apple Mac Mini drm/i915: sync SDVO code with stable userland modesetting driver drm/i915: Unref the object after failing to set tiling mode. drm/i915: add fence register management to execbuf drm/i915: Return error from i915_gem_object_get_fence_reg() when failing. drm/i915: Set up an MTRR covering the GTT at driver load. drm/i915: Skip SDVO/HDMI init when the chipset tells us it's not present. drm/i915: Suppress GEM teardown on X Server exit in KMS mode. drm/radeon: fix ioremap conflict with AGP mappings i915: fix unneeded locking in i915 LVDS get modes code.
| | * | | | drm/i915: add fence register management to execbufJesse Barnes2009-02-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds code to set up fence registers at execbuf time on pre-965 chips as necessary. Also fixes up a few bugs in the pre-965 tile register support (get_order != ffs). The number of fences available to the kernel defaults to the hw limit minus 3 (for legacy X front/back/depth), but a new parameter allows userspace to override that as needed. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@linux.ie>
| * | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds2009-02-092-2/+7
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: scatterwalk - Avoid flush_dcache_page on slab pages crypto: shash - Fix tfm destruction crypto: api - Fix zeroing on free crypto: shash - Fix module refcount crypto: api - Fix algorithm test race that broke aead initialisation
| | * | | | | crypto: shash - Fix tfm destructionHerbert Xu2009-02-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were freeing an offset into the slab object instead of the start. This patch fixes it by calling crypto_destroy_tfm which allows the correct address to be given. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| | * | | | | crypto: api - Fix zeroing on freeHerbert Xu2009-02-051-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Geert Uytterhoeven pointed out that we're not zeroing all the memory when freeing a transform. This patch fixes it by calling ksize to ensure that we zero everything in sight. Reported-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | | | | | x86: spinlocks: define dummy __raw_spin_is_contendedKyle McMartin2009-02-091-0/+5
| | |_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Architectures other than mips and x86 are not using ticket spinlocks. Therefore, the contention on the lock is meaningless, since there is nobody known to be waiting on it (arguably /fairly/ unfair locks). Dummy it out to return 0 on other architectures. Signed-off-by: Kyle McMartin <kyle@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | tracing/power: move the power trace headers to a dedicated fileFrederic Weisbecker2009-02-092-30/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Move the power tracer headers to trace/power.h to keep ftrace.h and power bits more easy to maintain as separated topics. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | Merge branch 'tip/tracing/core/devel' of ↵Ingo Molnar2009-02-094-2/+26
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace Conflicts: kernel/trace/trace_hw_branches.c
| * | | | | | trace: trivial fixes in comment typos.Wenji Huang2009-02-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: clean up Fixed several typos in the comments. Signed-off-by: Wenji Huang <wenji.huang@oracle.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * | | | | | ring-buffer: use generic version of in_nmiSteven Rostedt2009-02-071-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: clean up Now that a generic in_nmi is available, this patch removes the special code in the ring_buffer and implements the in_nmi generic version instead. With this change, I was also able to rename the "arch_ftrace_nmi_enter" back to "ftrace_nmi_enter" and remove the code from the ring buffer. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * | | | | | nmi: add generic nmi tracking stateSteven Rostedt2009-02-071-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code adds an in_nmi() macro that uses the current tasks preempt count to track when it is in NMI context. Other parts of the kernel can use this to determine if the context is in NMI context or not. This code was inspired by the -rt patch in_nmi version that was written by Peter Zijlstra, who borrowed that code from Mathieu Desnoyers. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * | | | | | ring-buffer: allow tracing_off to be used in core kernel codeSteven Rostedt2009-02-071-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tracing_off() is the fastest way to stop recording to the ring buffers. This may be used in places like panic and die, just before the ftrace_dump is called. This patch adds the appropriate CPP conditionals to make it a stub function when the ring buffer is not configured it. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| * | | | | | ring-buffer: add NMI protection for spinlocksSteven Rostedt2009-02-071-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: prevent deadlock in NMI The ring buffers are not yet totally lockless with writing to the buffer. When a writer crosses a page, it grabs a per cpu spinlock to protect against a reader. The spinlocks taken by a writer are not to protect against other writers, since a writer can only write to its own per cpu buffer. The spinlocks protect against readers that can touch any cpu buffer. The writers are made to be reentrant with the spinlocks disabling interrupts. The problem arises when an NMI writes to the buffer, and that write crosses a page boundary. If it grabs a spinlock, it can be racing with another writer (since disabling interrupts does not protect against NMIs) or with a reader on the same CPU. Luckily, most of the users are not reentrant and protects against this issue. But if a user of the ring buffer becomes reentrant (which is what the ring buffers do allow), if the NMI also writes to the ring buffer then we risk the chance of a deadlock. This patch moves the ftrace_nmi_enter called by nmi_enter() to the ring buffer code. It replaces the current ftrace_nmi_enter that is used by arch specific code to arch_ftrace_nmi_enter and updates the Kconfig to handle it. When an NMI is called, it will set a per cpu variable in the ring buffer code and will clear it when the NMI exits. If a write to the ring buffer crosses page boundaries inside an NMI, a trylock is used on the spin lock instead. If the spinlock fails to be acquired, then the entry is discarded. This bug appeared in the ftrace work in the RT tree, where event tracing is reentrant. This workaround solved the deadlocks that appeared there. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
* | | | | | | Merge commit 'v2.6.29-rc4' into tracing/coreIngo Molnar2009-02-0911-31/+58
|\ \ \ \ \ \ \ | | |/ / / / / | |/| | | | |
| * | | | | | async: Rename _special -> _domain for clarity.Cornelia Huck2009-02-081-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename the async_*_special() functions to async_*_domain(), which describes the purpose of these functions much better. [Broke up long lines to silence checkpatch] Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
| * | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2009-02-071-1/+1
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI PM: make the PM core more careful with drivers using the new PM framework PCI PM: Read power state from device after trying to change it on resume PCI PM: Do not disable and enable bridges during suspend-resume PCI: PCIe portdrv: Simplify suspend and resume PCI PM: Fix saving of device state in pci_legacy_suspend PCI PM: Check if the state has been saved before trying to restore it PCI PM: Fix handling of devices without drivers PCI: return error on failure to read PCI ROMs PCI: properly clean up ASPM link state on device remove
| | * | | | | | PCI: return error on failure to read PCI ROMsTimothy S. Nelson2009-02-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes the ROM reading code return an error to user space if the size of the ROM read is equal to 0. The patch also emits a warnings if the contents of the ROM are invalid, and documents the effects of the "enable" file on ROM reading. Signed-off-by: Timothy S. Nelson <wayland@wayland.id.au> Acked-by: Alex Villacis-Lasso <a_villacis@palosanto.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
generated by cgit v1.1 at 2024-10-31 16:30:34 +0000