From a2e2725541fad72416326798c2d7fa4dafb7d337 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 12 Oct 2009 23:40:10 -0700 Subject: net: Introduce recvmmsg socket syscall MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Meaning receive multiple messages, reducing the number of syscalls and net stack entry/exit operations. Next patches will introduce mechanisms where protocols that want to optimize this operation will provide an unlocked_recvmsg operation. This takes into account comments made by: . Paul Moore: sock_recvmsg is called only for the first datagram, sock_recvmsg_nosec is used for the rest. . Caitlin Bestler: recvmmsg now has a struct timespec timeout, that works in the same fashion as the ppoll one. If the underlying protocol returns a datagram with MSG_OOB set, this will make recvmmsg return right away with as many datagrams (+ the OOB one) it has received so far. . Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen datagrams and then recvmsg returns an error, recvmmsg will return the successfully received datagrams, store the error and return it in the next call. This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg, where we will be able to acquire the lock only at batch start and end, not at every underlying recvmsg call. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- arch/blackfin/mach-common/entry.S | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/blackfin/mach-common') diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 1e7cac2..4869272 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -1621,6 +1621,7 @@ ENTRY(_sys_call_table) .long _sys_pwritev .long _sys_rt_tgsigqueueinfo .long _sys_perf_event_open + .long _sys_recvmmsg /* 370 */ .rept NR_syscalls-(.-_sys_call_table)/4 .long _sys_ni_syscall -- cgit v1.1 From f8b7256096a20436f6d0926747e3ac3d64c81d24 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 30 Nov 2009 17:37:04 -0500 Subject: Unify sys_mmap* New helper - sys_mmap_pgoff(); switch syscalls to using it. Acked-by: David S. Miller Signed-off-by: Al Viro --- arch/blackfin/mach-common/entry.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/blackfin/mach-common') diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index a50637a..f3f8bb4 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -1422,7 +1422,7 @@ ENTRY(_sys_call_table) .long _sys_ni_syscall /* streams2 */ .long _sys_vfork /* 190 */ .long _sys_getrlimit - .long _sys_mmap2 + .long _sys_mmap_pgoff .long _sys_truncate64 .long _sys_ftruncate64 .long _sys_stat64 /* 195 */ -- cgit v1.1