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Greg Banks fce1456a19 [PATCH] knfsd: make nfsd readahead params cache SMP-friendly 
Make the nfsd read-ahead params cache more SMP-friendly by changing the single
global list and lock into a fixed 16-bucket hashtable with per-bucket locks.
This reduces spinlock contention in nfsd_read() on read-heavy workloads on
multiprocessor servers.

Testing was on a 4 CPU 4 NIC Altix using 4 IRIX clients each doing 1K
streaming reads at full line rate.  The server had 128 nfsd threads, which
sizes the RA cache at 256 entries, of which only a handful were used.  Flat
profiling shows nfsd_read(), including the inlined nfsd_get_raparms(), taking
10.4% of each CPU.  This patch drops the contribution from nfsd() to 1.71% for
each CPU.

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04 07:55:16 -07:00
..
9p
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
adfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
affs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
afs
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
autofs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
autofs4
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
befs
fix file specification in comments
2006-10-03 23:01:26 +02:00
bfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
cifs
Still more typo fixes
2006-10-03 22:36:44 +02:00
coda
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
configfs
[PATCH] pr_debug: configfs: use size_t length modifier in pr_debug format argument
2006-10-03 08:04:19 -07:00
cramfs
[PATCH] cramfs: make cramfs_uncompress_exit() return void
2006-09-29 09:18:20 -07:00
debugfs
debugfs: spelling fix
2006-10-03 23:28:36 +02:00
devpts
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
efs
[PATCH] Really ignore kmem_cache_destroy return value
2006-09-27 08:26:10 -07:00
exportfs
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
ext2
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
ext3
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
fat
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
freevxfs
[PATCH] freevxfs: fix leak on error path
2006-09-29 09:18:20 -07:00
fuse
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hfsplus
fix file specification in comments
2006-10-03 23:01:26 +02:00
hostfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
hpfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hppfs
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
hugetlbfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
isofs
[PATCH] I/O Error attempting to read last partial block of a file in an ISO9660 file system
2006-09-29 09:18:15 -07:00
jbd
fix file specification in comments
2006-10-03 23:01:26 +02:00
jffs
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
jffs2
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
jfs
JFS: White space cleanup
2006-10-02 09:55:27 -05:00
lockd
[PATCH] namespaces: utsname: switch to using uts namespaces
2006-10-02 07:57:21 -07:00
minix
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
msdos
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ncpfs
[PATCH] Move ncpfs 32bit compat ioctl to ncpfs
2006-10-01 00:39:23 -07:00
nfs
[PATCH] namespaces: utsname: switch to using uts namespaces
2006-10-02 07:57:21 -07:00
nfs_common
[PATCH] nfsacl: Solaris VxFS compatibility fix
2005-10-11 09:46:54 -07:00
nfsd
[PATCH] knfsd: make nfsd readahead params cache SMP-friendly
2006-10-04 07:55:16 -07:00
nls
fix file specification in comments
2006-10-03 23:01:26 +02:00
ntfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
ocfs2
[PATCH] r/o bind mounts: clean up OCFS2 nlink handling
2006-10-01 00:39:30 -07:00
openpromfs
Move several *_SUPER_MAGIC symbols to include/linux/magic.h.
2006-09-24 11:13:19 -04:00
partitions
[PATCH] fs/partitions: Conversion to generic boolean
2006-10-01 00:39:19 -07:00
proc
[PATCH] introduce get_task_pid() to fix unsafe get_pid()
2006-10-02 07:57:25 -07:00
qnx4
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ramfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
reiserfs
[PATCH] Remove unnecessary check in fs/reiserfs/inode.c
2006-10-04 07:55:14 -07:00
romfs
[PATCH] Really ignore kmem_cache_destroy return value
2006-09-27 08:26:10 -07:00
smbfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
sysfs
[PATCH] pr_debug: sysfs: use size_t length modifier in pr_debug format arguments
2006-10-03 08:04:19 -07:00
sysv
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
udf
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ufs
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
vfat
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
xfs
BUG_ON conversion for fs/xfs/
2006-10-03 23:37:55 +02:00
aio.c
[PATCH] pr_debug: aio: use size_t length modifier in pr_debug format arguments
2006-10-03 08:04:19 -07:00
attr.c
[PATCH] capable/capability.h (fs/)
2006-01-11 18:42:13 -08:00
bad_inode.c
[PATCH] Remove readv/writev methods and use aio_read/aio_write instead
2006-10-01 00:39:28 -07:00
binfmt_aout.c
[PATCH] Require mmap handler for a.out executables
2006-09-29 09:18:08 -07:00
binfmt_elf_fdpic.c
[PATCH] elf_fdpic_core_dump: don't take tasklist_lock
2006-09-29 09:18:14 -07:00
binfmt_elf.c
[PATCH] Support piping into commands in /proc/sys/kernel/core_pattern
2006-10-01 00:39:33 -07:00
binfmt_em86.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
binfmt_flat.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
binfmt_misc.c
[PATCH] Fix unserialized task->files changing
2006-09-29 09:18:12 -07:00
binfmt_script.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
binfmt_som.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
bio.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
block_dev.c
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
buffer.c
[PATCH] BLOCK: Move functions out of buffer code [try #6]
2006-09-30 20:31:19 +02:00
char_dev.c
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
2006-09-30 20:52:18 +02:00
compat_ioctl.c
[PATCH] Move ncpfs 32bit compat ioctl to ncpfs
2006-10-01 00:39:23 -07:00
compat.c
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
dcache.c
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
2006-09-30 20:52:18 +02:00
dcookies.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
direct-io.c
[PATCH] lockdep: annotate direct io
2006-07-03 15:27:06 -07:00
dnotify.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
dquot.c
[PATCH] dquot: add proper locking when using current->signal->tty
2006-09-29 09:18:14 -07:00
drop_caches.c
[PATCH] drop-pagecache
2006-01-08 20:12:40 -08:00
eventpoll.c
[PATCH] fs/eventpoll: error handling micro-cleanup
2006-10-03 08:03:41 -07:00
exec.c
[PATCH] namespaces: utsname: switch to using uts namespaces
2006-10-02 07:57:21 -07:00
fcntl.c
[PATCH] file: Add locking to f_getown
2006-10-02 07:57:15 -07:00
fifo.c
[PATCH] pipe.c/fifo.c code cleanups
2006-04-11 13:53:33 +02:00
file_table.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
file.c
[PATCH] expand_fdtable(): remove pointless unlock+lock
2006-09-29 09:18:25 -07:00
filesystems.c
[PATCH] Ban register_filesystem(NULL);
2006-09-29 09:18:20 -07:00
fs-writeback.c
[PATCH] BLOCK: Remove dependence on existence of blockdev_superblock [try #6]
2006-09-30 20:52:26 +02:00
generic_acl.c
[PATCH] Generic infrastructure for acls
2006-09-29 09:18:24 -07:00
inode.c
[PATCH] fs/inode.c tweaks
2006-10-02 07:57:14 -07:00
inotify_user.c
[PATCH] inotify: fix deadlock found by lockdep
2006-07-31 13:28:41 -07:00
inotify.c
[PATCH] inotify (4/5): allow watch removal from event handler
2006-06-20 05:25:19 -04:00
internal.h
[PATCH] CONFIG_BLOCK internal.h cleanups
2006-09-30 20:52:32 +02:00
ioctl.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ioprio.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
Kconfig
Still more typo fixes
2006-10-03 22:36:44 +02:00
Kconfig.binfmt
[PATCH] frv: suppress configuration of certain features for FRV
2006-01-08 20:13:36 -08:00
libfs.c
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
locks.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
Makefile
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
mbcache.c
[PATCH] mbcache: add lock annotation for __mb_cache_entry_release_unlock()
2006-09-29 09:18:07 -07:00
mpage.c
[PATCH] BLOCK: Dissociate generic_writepages() from mpage stuff [try #6]
2006-09-30 20:52:26 +02:00
namei.c
[PATCH] r/o bind mount prepwork: move open_namei()'s vfs_create()
2006-10-01 00:39:30 -07:00
namespace.c
[PATCH] namespaces: incorporate fs namespace into nsproxy
2006-10-02 07:57:20 -07:00
nfsctl.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
no-block.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
open.c
[PATCH] r/o bind mounts: prepare for write access checks: collapse if()
2006-10-01 00:39:30 -07:00
pipe.c
[PATCH] Some cleanup in the pipe code
2006-10-01 00:39:33 -07:00
pnode.c
[PATCH] core: use list_move()
2006-06-26 09:58:17 -07:00
pnode.h
[PATCH] unbindable mounts
2005-11-07 18:18:11 -08:00
posix_acl.c
[PATCH] kmemdup: some users
2006-10-01 00:39:19 -07:00
quota_v1.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
quota_v2.c
[PATCH] sem2mutex: quota
2006-03-23 07:38:11 -08:00
quota.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
read_write.c
[PATCH] Add vector AIO support
2006-10-01 00:39:29 -07:00
read_write.h
[PATCH] Remove readv/writev methods and use aio_read/aio_write instead
2006-10-01 00:39:28 -07:00
readdir.c
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
select.c
[PATCH] enforce RLIMIT_NOFILE in poll()
2006-09-29 09:18:23 -07:00
seq_file.c
[PATCH] sem2mutex: fs/seq_file.c
2006-03-23 07:38:12 -08:00
splice.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
stat.c
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
super.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
sync.c
[PATCH] BLOCK: Move functions out of buffer code [try #6]
2006-09-30 20:31:19 +02:00
utimes.c
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
xattr_acl.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
xattr.c
[PATCH] log more info for directory entry change events
2006-06-20 05:25:28 -04:00