linux/ipc
Vasiliy Kulikov 298507d4d2 shm: optimize exit_shm()
We may optimistically check .in_use == 0 without holding the rw_mutex:
it's the common case, and if it's zero, there certainly won't be any
segments associated with us.

After taking the lock, the idr_for_each() will do the right thing, so we
could now drop the re-check inside the lock without any real cost.  But
it won't hurt.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-03 14:45:55 -10:00
..
compat_mq.c ipc: initialize structure memory to zero for compat functions 2010-10-27 18:03:13 -07:00
compat.c ipc: initialize structure memory to zero for compat functions 2010-10-27 18:03:13 -07:00
ipc_sysctl.c ipc: introduce shm_rmid_forced sysctl 2011-07-26 16:49:44 -07:00
ipcns_notifier.c
Makefile
mq_sysctl.c
mqueue.c ipc/mqueue.c: fix mq_open() return value 2011-07-26 16:49:44 -07:00
msg.c Fix common misspellings 2011-03-31 11:26:23 -03:00
msgutil.c userns: add a user namespace owner of ipc ns 2011-03-23 19:47:07 -07:00
namespace.c ns proc: Add support for the ipc namespace 2011-05-10 14:35:47 -07:00
sem.c ipc/sem.c: fix race with concurrent semtimedop() timeouts and IPC_RMID 2011-07-25 20:57:07 -07:00
shm.c shm: optimize exit_shm() 2011-08-03 14:45:55 -10:00
syscall.c
util.c ipc,rcu: Convert call_rcu(ipc_immediate_free) to kfree_rcu() 2011-07-20 14:10:16 -07:00
util.h userns: user namespaces: convert several capable() calls 2011-03-23 19:47:08 -07:00