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ab2af1f500
kernel-ark/fs
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Dipankar Sarma ab2af1f500 [PATCH] files: files struct with RCU 
Patch to eliminate struct files_struct.file_lock spinlock on the reader side
and use rcu refcounting rcuref_xxx api for the f_count refcounter.  The
updates to the fdtable are done by allocating a new fdtable structure and
setting files->fdt to point to the new structure.  The fdtable structure is
protected by RCU thereby allowing lock-free lookup.  For fd arrays/sets that
are vmalloced, we use keventd to free them since RCU callbacks can't sleep.  A
global list of fdtable to be freed is not scalable, so we use a per-cpu list.
If keventd is already handling the current cpu's work, we use a timer to defer
queueing of that work.

Since the last publication, this patch has been re-written to avoid using
explicit memory barriers and use rcu_assign_pointer(), rcu_dereference()
premitives instead.  This required that the fd information is kept in a
separate structure (fdtable) and updated atomically.

Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09 13:57:55 -07:00
..
adfs [ARM] fs/adfs/adfs.h: "extern inline" doesn't make sense 2005-08-20 17:20:28 +01:00
affs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
afs [PATCH] Fix up symlink function pointers 2005-08-19 18:08:21 -07:00
autofs [PATCH] autofs: fix "busy inodes after umount..." 2005-09-09 13:57:31 -07:00
autofs4 [PATCH] Fix up symlink function pointers 2005-08-19 18:08:21 -07:00
befs befs: fix up missed follow_link declaration change 2005-08-20 13:20:01 -07:00
bfs [PATCH] bfs: fix endianness, signedness; add trivial bugfix 2005-09-09 13:57:32 -07:00
cifs [PATCH] fs: convert kcalloc to kzalloc 2005-09-07 16:57:46 -07:00
coda [PATCH] class: convert the remaining class_simple users in the kernel to usee the new class api 2005-06-20 15:15:11 -07:00
cramfs [PATCH] fix cramfs making duplicate entries in inode cache 2005-09-07 16:57:33 -07:00
debugfs [PATCH] remove duplicate get_dentry functions in various places 2005-06-23 09:45:20 -07:00
devfs [PATCH] Fix up symlink function pointers 2005-08-19 18:08:21 -07:00
devpts [PATCH] Generic VFS fallback for security xattrs 2005-09-05 00:05:52 -07:00
efs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
exportfs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ext2 [PATCH] ext2: Enable atomic inode security labeling 2005-09-09 13:57:27 -07:00
ext3 [PATCH] ext3: Enable atomic inode security labeling 2005-09-09 13:57:28 -07:00
fat [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
freevxfs [PATCH] fs: convert kcalloc to kzalloc 2005-09-07 16:57:46 -07:00
hfs [PATCH] hfs: NLS support 2005-09-07 16:57:50 -07:00
hfsplus [PATCH] Change HFS+ to not use ll_rw_block() 2005-09-07 16:57:56 -07:00
hostfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
hpfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
hppfs [PATCH] hppfs: fix symlink error path 2005-08-26 11:39:19 -07:00
hugetlbfs [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
isofs Check input buffer size in zisofs 2005-08-06 09:42:06 -07:00
jbd [PATCH] Fix race in do_get_write_access() 2005-09-07 16:57:57 -07:00
jffs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
jffs2 [PATCH] jffs/jffs2: remove wrong function prototypes 2005-09-07 16:57:29 -07:00
jfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
lockd [PATCH] NFS: procfs/sysctl interfaces for lockd do not work on x86_64 2005-07-13 11:25:24 -07:00
minix [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
msdos Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ncpfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
nfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
nfs_common [PATCH] NFS: Ensure ACL xdr code doesn't overflow. 2005-08-16 08:52:11 -07:00
nfsd [PATCH] sunrpc: cache_register can use wrong module reference 2005-09-07 16:57:25 -07:00
nls [PATCH] make some things static 2005-05-05 16:36:47 -07:00
ntfs NTFS: 2.1.24 release and some minor final fixes. 2005-09-08 23:01:16 +01:00
openpromfs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
partitions [PATCH] small partitions/msdos cleanups 2005-06-25 16:24:59 -07:00
proc [PATCH] files: break up files struct 2005-09-09 13:57:55 -07:00
qnx4 [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
ramfs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
reiserfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
relayfs [PATCH] relayfs 2005-09-07 16:57:18 -07:00
romfs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
smbfs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
sysfs [PATCH] Fix oops in sysfs_hash_and_remove_file() 2005-08-26 19:37:13 -07:00
sysv [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
udf [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
ufs [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
vfat Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xfs [XFS] Revert recent quota Makefile change, not in a fit state for merging. 2005-09-09 11:38:09 +10:00
aio.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
attr.c [PATCH] inotify 2005-07-12 20:38:38 -07:00
bad_inode.c [PATCH] make some things static 2005-05-05 16:36:47 -07:00
binfmt_aout.c [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
binfmt_elf_fdpic.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_elf.c [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
binfmt_em86.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_flat.c [PATCH] uclinux: use MAP_PRIVATE when mmaping code regions in flat binary loader 2005-09-02 00:57:31 -07:00
binfmt_misc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_script.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_som.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
bio.c [PATCH] bogus cast in bio.c 2005-09-09 10:31:58 -07:00
block_dev.c [PATCH] block: add unlocked_ioctl support for block devices 2005-06-23 09:45:32 -07:00
buffer.c [PATCH] Make ll_rw_block() wait for buffer lock 2005-09-07 16:57:55 -07:00
char_dev.c [PATCH] cdev: cdev_put oops 2005-07-12 16:01:02 -07:00
compat_ioctl.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
compat.c [PATCH] remove duplicated sys_open32() code from 64bit archs 2005-09-07 16:57:43 -07:00
dcache.c [PATCH] fsnotify_name/inoderemove 2005-08-08 11:53:47 -07:00
dcookies.c [PATCH] dcookies.c: use proper refcounting functions 2005-07-07 18:23:52 -07:00
direct-io.c [PATCH] pass iocb to dio_iodone_t 2005-06-24 00:05:19 -07:00
dnotify.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dquot.c [PATCH] list_for_each_entry: fs-dquot.c 2005-06-25 16:25:11 -07:00
eventpoll.c [PATCH] Remove eventpoll macro obfuscation 2005-06-23 09:45:30 -07:00
exec.c [PATCH] files: break up files struct 2005-09-09 13:57:55 -07:00
fcntl.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
fifo.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
file_table.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
file.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
filesystems.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fs-writeback.c [PATCH] O(1) sb list traversing on syncs 2005-06-23 09:45:27 -07:00
inode.c [PATCH] move truncate_inode_pages() into ->delete_inode() 2005-09-09 13:57:26 -07:00
inotify.c [PATCH] inotify: fix event loss on hardlinked files 2005-09-07 16:57:39 -07:00
ioctl.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ioprio.c Don't allow normal users to set idle IO priority 2005-08-20 18:51:29 -07:00
Kconfig [PATCH] fs/Kconfig: quota help text updates 2005-09-07 16:57:29 -07:00
Kconfig.binfmt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
libfs.c [PATCH] fix fsync(dir) return value for ram-based filesystems 2005-06-25 16:24:38 -07:00
locks.c [PATCH] files: break up files struct 2005-09-09 13:57:55 -07:00
Makefile [PATCH] relayfs 2005-09-07 16:57:18 -07:00
mbcache.c [PATCH] mbcache: Remove unused mb_cache_shrink parameter 2005-07-27 16:26:07 -07:00
mpage.c [PATCH] mpage_end_io_write() I/O error handling fix 2005-06-04 17:12:59 -07:00
namei.c [PATCH] remove the inode_post_link and inode_post_rename LSM hooks 2005-09-09 13:57:28 -07:00
namespace.c [PATCH] pivot_root() circular reference fix 2005-09-07 16:58:01 -07:00
nfsctl.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
open.c [PATCH] files: files struct with RCU 2005-09-09 13:57:55 -07:00
pipe.c [PATCH] pipe: remove redundant fifo_poll abstraction 2005-09-07 16:57:35 -07:00
posix_acl.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
quota_v1.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
quota_v2.c [PATCH] quota: possible bug in quota format v2 support 2005-04-16 15:25:47 -07:00
quota.c [PATCH] O(1) sb list traversing on syncs 2005-06-23 09:45:27 -07:00
read_write.c [PATCH] remove file.f_maxcount 2005-09-07 16:57:32 -07:00
readdir.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
select.c [PATCH] files: break up files struct 2005-09-09 13:57:55 -07:00
seq_file.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
stat.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
super.c [PATCH] set mnt_namespace in the correct place 2005-07-07 18:23:52 -07:00
xattr_acl.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xattr.c [PATCH] fsnotify: hook on removexattr, too 2005-09-07 16:57:27 -07:00