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b589334c7a
kernel-ark/fs/xfs
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David Chinner b589334c7a [XFS] Prevent AIL lock contention during transaction completion 
When hundreds of processors attempt to commit transactions at the same
time, they can contend on the AIL lock when updating the tail LSN held in
the in-core log structure.

At the moment, the tail LSN is only needed when actually writing out an
iclog, so it really does not need to be updated on every single
transaction completion - only those that result in switching iclogs and
flushing them to disk.

The result is that we reduce the number of times we need to grab the AIL
lock and the log grant lock by up to two orders of magnitude on large
processor count machines. The problem has previously been hidden by AIL
lock contention walking the AIL list which was recently solved and
uncovered this issue.

SGI-PV: 975671
SGI-Modid: xfs-linux-melb:xfs-kern:30504a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
2008-04-18 11:38:01 +10:00
..
linux-2.6 [XFS] Don't block pdflush when writing back inodes 2008-04-18 11:37:32 +10:00
quota [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
support [XFS] add __init/__exit mark to specific init/cleanup functions 2008-02-07 18:25:19 +11:00
Kconfig
Makefile [XFS] Added quota targets and removed dmapi directory 2008-02-18 13:06:17 +11:00
xfs_acl.c [XFS] use generic_permission 2008-02-07 18:22:38 +11:00
xfs_acl.h [XFS] use generic_permission 2008-02-07 18:22:38 +11:00
xfs_ag.h
xfs_alloc_btree.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_alloc_btree.h
xfs_alloc.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_alloc.h
xfs_arch.h xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_attr_leaf.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_attr_leaf.h
xfs_attr_sf.h
xfs_attr.c
xfs_attr.h
xfs_bit.c [XFS] Undo bit ops cleanup mod due to regression on 32-bit powermac 2008-02-26 17:05:44 +11:00
xfs_bit.h [XFS] Undo bit ops cleanup mod due to regression on 32-bit powermac 2008-02-26 17:05:44 +11:00
xfs_bmap_btree.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_bmap_btree.h [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_bmap.c [XFS] actually check error returned by xfs_flush_pages, clean up and 2008-04-18 11:34:47 +10:00
xfs_bmap.h
xfs_btree.c
xfs_btree.h
xfs_buf_item.c
xfs_buf_item.h
xfs_clnt.h [XFS] If you mount an XFS filesystem with no mount options at all, then 2008-02-28 20:37:56 -08:00
xfs_da_btree.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_da_btree.h
xfs_dfrag.c [XFS] stop re-checking permissions in xfs_swapext 2008-02-07 18:22:24 +11:00
xfs_dfrag.h
xfs_dinode.h
xfs_dir2_block.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_dir2_block.h
xfs_dir2_data.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_dir2_data.h
xfs_dir2_leaf.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_dir2_leaf.h
xfs_dir2_node.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_dir2_node.h
xfs_dir2_sf.c
xfs_dir2_sf.h
xfs_dir2_trace.c
xfs_dir2_trace.h
xfs_dir2.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_dir2.h
xfs_dmapi.h [XFS] kill the vfs_flags member in struct bhv_vfs 2007-10-16 11:45:57 +10:00
xfs_dmops.c
xfs_error.c
xfs_error.h
xfs_extfree_item.c
xfs_extfree_item.h
xfs_filestream.c
xfs_filestream.h
xfs_fs.h
xfs_fsops.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_fsops.h
xfs_ialloc_btree.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_ialloc_btree.h
xfs_ialloc.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_ialloc.h
xfs_iget.c [XFS] Remove the xfs_icluster structure 2008-04-18 11:37:41 +10:00
xfs_imap.h
xfs_inode_item.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_inode_item.h [XFS] Use xfs_inode_clean() in more places 2008-04-18 11:37:51 +10:00
xfs_inode.c [XFS] Use xfs_inode_clean() in more places 2008-04-18 11:37:51 +10:00
xfs_inode.h [XFS] Remove the xfs_icluster structure 2008-04-18 11:37:41 +10:00
xfs_inum.h
xfs_iomap.c
xfs_iomap.h
xfs_itable.c [XFS] Don't block pdflush when writing back inodes 2008-04-18 11:37:32 +10:00
xfs_itable.h
xfs_log_priv.h [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_log_recover.c [XFS] Don't block pdflush when writing back inodes 2008-04-18 11:37:32 +10:00
xfs_log_recover.h
xfs_log.c [XFS] Prevent AIL lock contention during transaction completion 2008-04-18 11:38:01 +10:00
xfs_log.h
xfs_mount.c [XFS] Ensure "both" features2 slots are consistent 2008-04-10 16:25:26 +10:00
xfs_mount.h [XFS] If you mount an XFS filesystem with no mount options at all, then 2008-02-28 20:37:56 -08:00
xfs_mru_cache.c
xfs_mru_cache.h
xfs_qmops.c
xfs_quota.h
xfs_refcache.h
xfs_rename.c [XFS] Remove the xfs_refcache 2008-04-18 11:36:55 +10:00
xfs_rtalloc.c [XFS] Undo bit ops cleanup mod due to regression on 32-bit powermac 2008-02-26 17:05:44 +11:00
xfs_rtalloc.h
xfs_rw.c
xfs_rw.h
xfs_sb.h [XFS] Ensure "both" features2 slots are consistent 2008-04-10 16:25:26 +10:00
xfs_trans_ail.c [XFS] 977545 977545 977545 977545 977545 977545 xfsaild causing too many 2008-03-06 16:38:17 +11:00
xfs_trans_buf.c [XFS] Don't block pdflush when writing back inodes 2008-04-18 11:37:32 +10:00
xfs_trans_extfree.c
xfs_trans_inode.c
xfs_trans_item.c
xfs_trans_priv.h [XFS] Move AIL pushing into it's own thread 2008-02-07 18:22:51 +11:00
xfs_trans_space.h
xfs_trans.c xfs: convert beX_add to beX_add_cpu (new common API) 2008-02-13 16:21:19 -08:00
xfs_trans.h [XFS] Move AIL pushing into it's own thread 2008-02-07 18:22:51 +11:00
xfs_types.h
xfs_utils.c [XFS] remove shouting-indirection macros from xfs_sb.h 2008-04-10 16:24:45 +10:00
xfs_utils.h
xfs_vfsops.c [XFS] Remove the xfs_icluster structure 2008-04-18 11:37:41 +10:00
xfs_vfsops.h [XFS] kill xfs_root 2008-02-07 18:24:00 +11:00
xfs_vnodeops.c [XFS] Use xfs_inode_clean() in more places 2008-04-18 11:37:51 +10:00
xfs_vnodeops.h [XFS] use generic_permission 2008-02-07 18:22:38 +11:00
xfs.h