Nick Piggin fa0d7e3de6 fs: icache RCU free inodes ... RCU free the struct inode. This will allow: - Subsequent store-free path walking patch. The inode must be consulted for permissions when walking, so an RCU inode reference is a must. - sb_inode_list_lock to be moved inside i_lock because sb list walkers who want to take i_lock no longer need to take sb_inode_list_lock to walk the list in the first place. This will simplify and optimize locking. - Could remove some nested trylock loops in dcache code - Could potentially simplify things a bit in VM land. Do not need to take the page lock to follow page->mapping. The downsides of this is the performance cost of using RCU. In a simple creat/unlink microbenchmark, performance drops by about 10% due to inability to reuse cache-hot slab objects. As iterations increase and RCU freeing starts kicking over, this increases to about 20%. In cases where inode lifetimes are longer (ie. many inodes may be allocated during the average life span of a single inode), a lot of this cache reuse is not applicable, so the regression caused by this patch is smaller. The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU, however this adds some complexity to list walking and store-free path walking, so I prefer to implement this at a later date, if it is shown to be a win in real situations. I haven't found a regression in any non-micro benchmark so I doubt it will be a problem. Signed-off-by: Nick Piggin <npiggin@kernel.dk>		2011-01-07 17:50:26 +11:00
..
aops.c
aops.h
attrib.c
attrib.h
bitmap.c
bitmap.h
collate.c
collate.h
compress.c
debug.c
debug.h
dir.c	drop unused dentry argument to ->fsync	2010-05-27 22:05:02 -04:00
dir.h
endian.h
file.c	drop unused dentry argument to ->fsync	2010-05-27 22:05:02 -04:00
index.c
index.h
inode.c	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
inode.h	convert remaining ->clear_inode() to ->evict_inode()	2010-08-09 16:48:37 -04:00
Kconfig
layout.h
lcnalloc.c
lcnalloc.h
logfile.c
logfile.h
Makefile
malloc.h
mft.c
mft.h
mst.c
namei.c
ntfs.h
quota.c
quota.h
runlist.c
runlist.h
super.c	new helper: mount_bdev()	2010-10-29 04:16:13 -04:00
sysctl.c
sysctl.h
time.h
types.h
unistr.c
upcase.c
usnjrnl.c
usnjrnl.h
volume.h