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Kirill A. Shutemov 8c0a853770 fs: push rcu_barrier() from deactivate_locked_super() to filesystems 
There's no reason to call rcu_barrier() on every
deactivate_locked_super().  We only need to make sure that all delayed rcu
free inodes are flushed before we destroy related cache.

Removing rcu_barrier() from deactivate_locked_super() affects some fast
paths.  E.g.  on my machine exit_group() of a last process in IPC
namespace takes 0.07538s.  rcu_barrier() takes 0.05188s of that time.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 		2012-10-02 21:35:55 -04:00
..
Kconfig fs/Kconfig: move coda out 2009-01-22 13:16:01 +03:00
Makefile fs: change to new flag variable 2011-03-17 14:02:57 +01:00
cache.c coda: use list_for_each_entry 2012-07-14 16:32:56 +04:00
cnode.c coda: switch coda_cnode_make() to sane API as well, clean coda_lookup() 2012-01-10 11:13:16 -05:00
coda_cache.h take coda-private headers out of include/linux 2011-01-12 20:02:48 -05:00
coda_fs_i.h coda: switch coda_cnode_make() to sane API as well, clean coda_lookup() 2012-01-10 11:13:16 -05:00
coda_int.h fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
coda_linux.c filesystems: add set_nlink() 2011-11-02 12:53:43 +01:00
coda_linux.h fs: Convert vmalloc/memset to vzalloc 2011-09-15 13:56:28 +02:00
dir.c don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
file.c fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
inode.c fs: push rcu_barrier() from deactivate_locked_super() to filesystems 2012-10-02 21:35:55 -04:00
pioctl.c ->permission() sanitizing: don't pass flags to ->permission() 2011-07-20 01:43:24 -04:00
psdev.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
symlink.c take coda-private headers out of include/linux 2011-01-12 20:02:48 -05:00
sysctl.c codafs: fix build break when CONFIG_PROC_SYSCTL=n 2011-03-25 17:45:16 -07:00
upcall.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00