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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>		14 years ago
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auth_gss	Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux	14 years ago
xprtrdma	sunrpc/xprtrdma: clean up workqueue usage	14 years ago
Kconfig	nfsd4: remove spkm3	15 years ago
Makefile	SUNRPC: Provide functions for managing universal addresses	16 years ago
addr.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
auth.c	Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux	14 years ago
auth_generic.c	sunrpc: fix up rpcauth_remove_module section mismatch	15 years ago
auth_null.c	SUNRPC: Move the bound cred to struct rpc_rqst	15 years ago
auth_unix.c	SUNRPC: Move the bound cred to struct rpc_rqst	15 years ago
backchannel_rqst.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
bc_svc.c	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	15 years ago
cache.c	Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux	14 years ago
clnt.c	SUNRPC: Fix an infinite loop in call_refresh/call_refreshresult	14 years ago
netns.h	sunrpc: Make the ip_map_cache be per-net	15 years ago
rpc_pipe.c	fs: icache RCU free inodes	14 years ago
rpcb_clnt.c	Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux	14 years ago
sched.c	Merge branch 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6	14 years ago
socklib.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
stats.c	SUNRPC: Simplify rpc_alloc_iostats by removing pointless local variable	14 years ago
sunrpc.h	nfsd41: sunrpc: Added rpc server-side backchannel handling	16 years ago
sunrpc_syms.c	sunrpc: Make the ip_map_cache be per-net	15 years ago
svc.c	sunrpc: close connection when a request is irretrievably lost.	15 years ago
svc_xprt.c	sunrpc: prevent use-after-free on clearing XPT_BUSY	14 years ago
svcauth.c	net: Move && and || to end of previous line	15 years ago
svcauth_unix.c	sunrpc: Use helper to set v4 mapped addr in ip_map_parse	15 years ago
svcsock.c	svcrpc: svc_tcp_sendto XPT_DEAD check is redundant	14 years ago
sysctl.c	sysctl: Drop & in front of every proc_handler.	15 years ago
timer.c	SUNRPC: Add documenting comments in net/sunrpc/timer.c	16 years ago
xdr.c	SUNRPC: Add a helper function xdr_inline_peek	14 years ago
xprt.c	sunrpc: Turn list_for_each-s into the ..._entry-s	15 years ago
xprtsock.c	Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux	14 years ago