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* powerpc: Fix build of some FSL platformsBenjamin Herrenschmidt2009-11-243-6/+6
| | | | | | | | | | | | | Commit 87ec0e98cfdd8b68da6a7f9e70142ffc0e404fbb in kumar's next branch broke one of my test configs since it looks like Anton forgot about that mpc832x_rdb platform which still uses the old style probing for the SPI stuff. I'll let them do a cleaner fix that probably involves changing the probing method and getting rid of the platform device but for now this will do to fix it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix wrong error code from ppc32 select syscallarnd@arndb.de2009-11-241-1/+1
| | | | | | | | | | | | This patch was submitted, discussed, and eventually Acked by everyone, yet still isn't in the tree. See: http://patchwork.ozlabs.org/patch/1240/ Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Arnd Bergmann <arnd@anrdb.de> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix DEBUG_HIGHMEM build break from d4515646699Becky Bruce2009-11-241-0/+11
| | | | | | | | | | | | | Code was added to mm/higmem.c that depends on several kmap types that powerpc does not support. We add dummy invalid definitions for KM_NMI, KM_NM_PTE, and KM_IRQ_PTE. According to list discussion, this fix should not be needed anymore starting with 2.6.33. The code is commented to this effect so hopefully we will remember to remove this. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Kill unused swiotlb variableFUJITA Tomonori2009-11-241-1/+0
| | | | | | | We can kill unused swiotlb variable. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: do not export pci_alloc/free_consistentStephen Rothwell2009-11-241-2/+0
| | | | | | | Since they are static inline functions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: kill the obsolete code under is_global_init()Benjamin Herrenschmidt2009-11-241-22/+0
| | | | | | | | | | | | The code under "if (is_global_init())" is bogus, and is_global_init() itself is not right in mt case. Contrary to what the comment says, nowadays force_sig_info() does kill init even if the handler is SIG_DFL. Note that force_sig_info() clears SIGNAL_UNKILLABLE exactly for this case. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Add hooks to put the CPU into an appropriate offline stateGautham R Shenoy2009-11-244-9/+216
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a CPU is offlined on POWER currently, we call rtas_stop_self() and hand the CPU back to the resource pool. This path is used for DLPAR which will cause a change in the LPAR configuration which will be visible outside. This patch changes the default state a CPU is put into when it is offlined. On platforms which support ceding the processor to the hypervisor with latency hint specifier value, during a cpu offline operation, instead of calling rtas_stop_self(), we cede the vCPU to the hypervisor while passing a latency hint specifier value. The Hypervisor can use this hint to provide better energy savings. Also, during the offline operation, the control of the vCPU remains with the LPAR as oppposed to returning it to the resource pool. The patch achieves this by creating an infrastructure to set the preferred_offline_state() which can be either - CPU_STATE_OFFLINE: which is the current behaviour of calling rtas_stop_self() - CPU_STATE_INACTIVE: which cedes the vCPU to the hypervisor with the latency hint specifier. The codepath which wants to perform a DLPAR operation can set the preferred_offline_state() of a CPU to CPU_STATE_OFFLINE before invoking cpu_down(). The patch also provides a boot-time command line argument to disable/enable CPU_STATE_INACTIVE. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Add extended_cede_processor() helper function.Gautham R Shenoy2009-11-243-2/+32
| | | | | | | | | | | This patch provides an extended_cede_processor() helper function which takes the cede latency hint as an argument. This hint is to be passed on to the hypervisor to cede to the corresponding state on platforms which support it. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Move ehea hcall definitions into hvcall.hAnton Blanchard2009-11-243-52/+13
| | | | | | | | Move ehea hcall definitions into hvcall.h. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Thomas Klein <tklein@de.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fixup last users of irq_chip->typenameThomas Gleixner2009-11-2429-40/+39
| | | | | | | | | | | The typename member of struct irq_chip was kept for migration purposes and is obsolete since more than 2 years. Fix up the leftovers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Replace old style lock initializerThomas Gleixner2009-11-241-2/+6
| | | | | | | | | | | | SPIN_LOCK_UNLOCKED is deprecated. Init the lock array at runtime instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* macintosh: Remove BKL from nvram driverThomas Gleixner2009-11-241-8/+3
| | | | | | | | | | | | | | Drop the bkl from nvram_llseek() as it obviously protects nothing. The file offset is safe in essence. The ioctl can be converted to unlocked_ioctl because it just calls pmac_get_partition() which reads a value from an array which was initialized at early boot time. No need for serialization. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Use unlocked ioctl in nvram_64Thomas Gleixner2009-11-241-7/+7
| | | | | | | | | | | The ioctl is only used for powermac systems and reads a partition number from an array which is initialized at boot time way before the nvram code is initialized. So it's safe to switch to unlocked_ioctl. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/spufs: Fix test in spufs_switch_log_read()roel kluin2009-11-241-1/+1
| | | | | | | | size_t len cannot be less than 0. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge commit 'jwb/next' into nextBenjamin Herrenschmidt2009-11-248-3/+36
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| * powerpc/44x: Enable 64bit (>= 4GB) memory size in Katmai dtsStefan Roese2009-11-041-3/+11
| | | | | | | | | | | | | | | | | | | | Additionally to increasing #size-cells to in the root node, we also need to explicitly define the ranges property in the plb node, because of the different #size-cells between child and parent. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * powerpc/4xx: Add 16K FIFO size DTS entries on supported platformsDave Mitchell2009-11-047-0/+25
| | | | | | | | | | | | | | | | | | | | | | Adding tx/rx-fifo-size-gige to EMAC fields for evaluation kit DTS files where appropriate. Signed-off-by: Dave Mitchell <dmitchell@appliedmicro.com> Acked-by: Prodyut Hazarika <phazarika@appliedmicro.com> Acked-by: Victor Gallardo <vgallardo@appliedmicro.com> Acked-by: Loc Ho <lho@appliedmicro.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | powerpc/p4080: Add basic support for p4080ds platformKumar Gala2009-11-206-0/+785
| | | | | | | | | | | | | | Add basic support for the P4080 DS reference board. None of the data path devices (ethernet, crypto, pme) are support at this time. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Support for NVRAM on GE Fanuc's PPC9AMartyn Welch2009-11-204-1/+13
| | | | | | | | | | | | | | Add support for NVRAM on GE Fanuc's PPC9A. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Support for NVRAM on GE Fanuc's SBC310Martyn Welch2009-11-204-1/+13
| | | | | | | | | | | | | | Add support for NVRAM on GE Fanuc's SBC310. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Enable NVRAM on GE Fanuc's SBC610Martyn Welch2009-11-204-2/+14
| | | | | | | | | | | | | | This patch enables the NVRAM found on the GE Fanuc SBC610 Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/fsl: Add PCI device ids for new QoirQ chipsKumar Gala2009-11-202-0/+28
| | | | | | | | Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/fsl-booke: Rework TLB CAM codeKumar Gala2009-11-204-94/+74
| | | | | | | | | | | | | | | | | | Re-write the code so its more standalone and fixed some issues: * Bump'd # of CAM entries to 64 to support e500mc * Make the code handle MAS7 properly * Use pr_cont instead of creating a string as we go Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/85xx: Kconfig cleanupKumar Gala2009-11-206-20/+20
| | | | | | | | | | | | | | Introduce new FSL_SOC_BOOKE Kconfig to handle both 85xx and QorIQ based chips. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/fsl: Make fsl_deep_sleep() usable w/ modules and non-83xx buildsAnton Vorontsov2009-11-112-0/+5
| | | | | | | | | | | | | | | | Export is needed for modular builds, and a static inline stub is needed for non-MPC83xx builds. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/83xx: Add power management support for MPC83xx QE boardsAnton Vorontsov2009-11-115-0/+43
| | | | | | | | | | | | | | | | Simply add power management controller nodes and sleep properties. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/86xx: Add power management support for MPC8610HPCD boardsAnton Vorontsov2009-11-113-4/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds needed nodes and properties to support suspend/resume on the MPC8610HPCD boards. There is a dedicated switch (SW9) that is used to wake up the boards. By default the SW9 button is routed to IRQ8, but could be re-routed (via PIXIS) to sreset. With 'no_console_suspend' kernel command line argument specified, the board is also able to wakeup upon serial port input. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> [dts] Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/85xx: Add power management support for MPC85xxMDS boardsAnton Vorontsov2009-11-113-78/+153
| | | | | | | | | | | | | | | | | | | | | | - Add power management controller nodes; - Add interrupts for RTC nodes, the RTC interrupt may be used as a wakeup source; - Add sleep properties (DEVDISR bit mask) and sleep-nexus nodes. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/85xx/86xx: Add suspend/resume supportAnton Vorontsov2009-11-113-1/+99
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds suspend/resume support for MPC8540 and MPC8641D- compatible CPUs. To reach sleep state, we just write the SLP bit into the PM control and status register. So far we don't support Deep Sleep mode as found in newer MPC85xx CPUs (i.e. MPC8536). It can be relatively easy implemented though, and for it we reserve 'mem' suspend type. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe: Implement QE driver for handling resume on MPC85xxAnton Vorontsov2009-11-111-0/+34
| | | | | | | | | | | | | | | | So far the driver is used to reset QE upon resume, which is needed on 85xx. Later we can move some QE initialization steps into probe(). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | spi_mpc8xxx: Add support for QE DMA mode and CPM1/CPM2 chipsAnton Vorontsov2009-11-112-43/+500
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds QE buffer descriptors mode support for the spi_mpc8xxx driver, and as a side effect we now support CPM1 and CPM2 SPI controllers. That means that today we support almost all MPC SPI controllers: - MPC834x-style controllers (support PIO mode only); - CPM1 and CPM2 controllers (support DMA mode only); - QE SPI controllers in CPU mode (PIO mode with shift quirks); - QE SPI controllers in buffer descriptors (DMA) mode; The only controller we don't currently support is a newer eSPI (with a dedicated chip selects and a bit different registers map). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | spi_mpc8xxx: Turn qe_mode into flagsAnton Vorontsov2009-11-112-12/+20
| | | | | | | | | | | | | | | | | | | | | | Soon there will be more flags introduced in subsequent patches, so let's turn qe_mode into flags. Also introduce mpc8xxx_spi_strmode() and print current SPI mode. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | spi_mpc8xxx: Factor out SPI mode change steps into a callAnton Vorontsov2009-11-111-32/+24
| | | | | | | | | | | | | | | | We'll add more steps soon, so get rid of the duplication. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | spi_mpc8xxx: Fix uninitialized variableAnton Vorontsov2009-11-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following warning: CC drivers/spi/spi_mpc8xxx.o spi_mpc8xxx.c: In function 'of_mpc8xxx_spi_probe': spi_mpc8xxx.c:681: warning: 'ret' may be used uninitialized in this function Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe&cpm: Implement static inline stubs for non-QE/CPM buildsAnton Vorontsov2009-11-113-16/+54
| | | | | | | | | | | | | | | | | | | | This is needed to avoid ugly #ifdefs in drivers. Also update fsl_qe_udc driver so that now it doesn't define its own versions that cause build breakage when the generic stubs are used. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/cpm: Move CPMFCR_* defines into cpm.hAnton Vorontsov2009-11-112-8/+16
| | | | | | | | | | | | | | | | | | | | The bits are generic to CPM devices, so let's move them to the common header file, so drivers won't need to privately reintroduce another bunch of the same bits (as we can't include cpm2.h header together with cpm1.h). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe&cpm2: Avoid redefinitions in CPM2 and QE headersAnton Vorontsov2009-11-113-5/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct mcc defined in both immap_qe.h and immap_cpm2.h, so they will conflic when included in a single file. The mcc struct is easy to deal with, since it isn't used in any driver (yet), so let's just rename QE version to qe_mcc. The ucb_ctlr is a bit trickier, since it is used by fsl_qe_udc driver, and the driver supports both CPM and QE UDCs, plus the QE version is used to form a bigger immap struct. I don't want to touch too much of USB code in this series, so for now let's just copy most generic version into the common cpm.h header, later we'll create cpm_usb.h where we'll place common USB structs that are used by QE/CPM UDC and QE Host drivers (FHCI). And as for the structs in qe.h and cpm2.h, just prefix them with qe_ and cpm_. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/cpm: Remove SPI defines and spi structsAnton Vorontsov2009-11-112-84/+0
| | | | | | | | | | | | | | | | | | | | | | When cpm2.h included into spi_mpc8xxx driver, the SPI defines in the header conflict with defines in the driver. We don't need them in the header file, so remove them. Plus remove "struct spi", we'll use a better version in the driver. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/85xx: Added P1020RDB Platform support.Poonam Aggrwal2009-11-112-0/+501
| | | | | | | | | | | | | | | | | | | | | | | | | | | | P1020 is another member of Freescale QorIQ series of processors. It is an e500 based dual core SOC. Being a scaled down version of P2020 it has following differences from P2020: - 533MHz - 800MHz core frequency. - 256Kbyte L2 cache - Ethernet controllers with classification capabilities(new controller). From board perspective P1020RDB is same as P2020RDB. Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe: QE also shuts down on MPC8568Anton Vorontsov2009-11-112-14/+22
| | | | | | | | | | | | | | | | | | | | It appears that QE shuts down on all MPC85xx CPUs (i.e. MPC8568 and MPC8569) and thus needs reset upon resume. So modify qe_alive_during_sleep() to account that. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe: Make qe_reset() code path safe for repeated invocationAnton Vorontsov2009-11-113-7/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | For MPC8569 CPUs we'll need to reset QE after each suspend, so make qe_reset() code path suitable for repeated invocation, that is: - Don't initialize rheap structures if already initialized; - Don't allocate muram for SDMA if already allocated, just reinitialize registers with previously allocated muram offset; - Remove __init attributes from qe_reset() and cpm_muram_init(); Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/85xx: Create dts for each core in CAMP mode for P2020RDBPoonam Aggrwal2009-11-113-1/+556
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch creates the dts files for each core and splits the devices between the two cores for P2020RDB. core0 has memory, L2, i2c, spi, dma1, usb, eth0, eth1, crypto, global-util, pci0, core1 has L2, dma2, eth0, pci1, msi. MPIC is shared between two cores but each core will protect its interrupts from other core by using "protected-sources" of mpic. Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe: Add qe_upload_firmware() stub for non-QE buildsAnton Vorontsov2009-11-111-0/+7
| | | | | | | | | | | | | | This is needed to avoid #ifdefs in MPC85xx suspend/resume code. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | powerpc/qe: Increase MAX_QE_RISC to 4Anton Vorontsov2009-11-111-1/+1
| | | | | | | | | | | | | | | | | | MPC8569 CPUs have four QE RISCs, so we need to increase MAX_QE_RISC constant, otherwise qe_upload_firmware() fails at sanity checking. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | Merge commit 'origin/master' into nextBenjamin Herrenschmidt2009-11-12590-8130/+9041
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| * \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds2009-11-116-50/+183
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: fix panic when trying to destroy a newly allocated Btrfs: allow more metadata chunk preallocation Btrfs: fallback on uncompressed io if compressed io fails Btrfs: find ideal block group for caching Btrfs: avoid null deref in unpin_extent_cache() Btrfs: skip btrfs_release_path in btrfs_update_root and btrfs_del_root Btrfs: fix some metadata enospc issues Btrfs: fix how we set max_size for free space clusters Btrfs: cleanup transaction starting and fix journal_info usage Btrfs: fix data allocation hint start
| | * | Btrfs: fix panic when trying to destroy a newly allocatedJosef Bacik2009-11-111-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a problem where iget5_locked will look for an inode, not find it, and then subsequently try to allocate it. Another CPU will have raced in and allocated the inode instead, so when iget5_locked gets the inode spin lock again and does a search, it finds the new inode. So it goes ahead and calls destroy_inode on the inode it just allocated. The problem is we don't set BTRFS_I(inode)->root until the new inode is completely initialized. This patch makes us set root to NULL when alloc'ing a new inode, so when we get to btrfs_destroy_inode and we see that root is NULL we can just free up the memory and continue on. This fixes the panic http://www.kerneloops.org/submitresult.php?number=812690 Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * | Btrfs: allow more metadata chunk preallocationChris Mason2009-11-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On an FS where all of the space has not been allocated into chunks yet, the enospc can return enospc just because the existing metadata chunks are full. We get around this by allowing more metadata chunks to be allocated up to a certain limit, and finding the right limit is a little fuzzy. The problem is the reservations for delalloc would preallocate way too much of the FS as metadata. We need to start saying no and just force some IO to happen. But we also need to let a reasonable amount of the FS become metadata. This bumps the hard limit up, later releases will have a better system. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * | Btrfs: fallback on uncompressed io if compressed io failsJosef Bacik2009-11-111-8/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently compressed IO does not deal with not having its entire extent able to be allocated. So if we have enough free space to allocate for the extent, but its not contiguous, it will fail spectacularly. This patch fixes this by falling back on uncompressed IO which lets us spread the delalloc extent across multiple extents. I tested this by making us randomly think the reservation had failed to make it fallback on the uncompressed io way and it seemed to work fine. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * | Btrfs: find ideal block group for cachingJosef Bacik2009-11-111-23/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes a few things. Hopefully the comments are helpfull, but I'll try and be as verbose here. Problem: My fedora box was taking 1 minute and 21 seconds to boot with btrfs as root. Part of this problem was we pick the first block group we can find and start caching it, even if it may not have enough free space. The other problem is we only search for cached block groups the first time around, which we won't find any cached block groups because this is a newly mounted fs, so we end up caching several block groups during bootup, which with alot of fragmentation takes around 30-45 seconds to complete, which bogs down the system. So Solution: 1) Don't cache block groups willy-nilly at first. Instead try and figure out which block group has the most free, and therefore will take the least amount of time to cache. 2) Don't be so picky about cached block groups. The other problem is once we've filled up a cluster, if the block group isn't finished caching the next time we try and do the allocation we'll completely ignore the cluster and start searching from the beginning of the space, which makes us cache more block groups, which slows us down even more. So instead of skipping block groups that are not finished caching when we have a hint, only skip the block group if it hasn't started caching yet. There is one other tweak in here. Before if we allocated a chunk and still couldn't find new space, we'd end up switching the space info to force another chunk allocation. This could make us end up with way too many chunks, so keep track of this particular case. With this patch and my previous cluster fixes my fedora box now boots in 43 seconds, and according to the bootchart is not held up by our block group caching at all. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
generated by cgit v1.1 at 2025-01-30 16:16:08 +0000