Dave Chinner dcd79a1423 xfs: don't use vfs writeback for pure metadata modifications ... Under heavy multi-way parallel create workloads, the VFS struggles to write back all the inodes that have been changed in age order. The bdi flusher thread becomes CPU bound, spending 85% of it's time in the VFS code, mostly traversing the superblock dirty inode list to separate dirty inodes old enough to flush. We already keep an index of all metadata changes in age order - in the AIL - and continued log pressure will do age ordered writeback without any extra overhead at all. If there is no pressure on the log, the xfssyncd will periodically write back metadata in ascending disk address offset order so will be very efficient. Hence we can stop marking VFS inodes dirty during transaction commit or when changing timestamps during transactions. This will keep the inodes in the superblock dirty list to those containing data or unlogged metadata changes. However, the timstamp changes are slightly more complex than this - there are a couple of places that do unlogged updates of the timestamps, and the VFS need to be informed of these. Hence add a new function xfs_trans_ichgtime() for transactional changes, and leave xfs_ichgtime() for the non-transactional changes. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>		2010-10-18 15:07:45 -05:00
..
linux-2.6	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
quota	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
support	xfs: drop dmapi hooks	2010-07-26 13:16:33 -05:00
Kconfig	xfs: use generic Posix ACL code	2009-06-10 17:07:47 +02:00
Makefile	xfs: simplify log item descriptor tracking	2010-07-26 13:16:34 -05:00
xfs.h	xfs: event tracing support	2009-12-14 23:08:16 -06:00
xfs_acl.h	xfs: constify xattr_handler	2010-05-21 18:31:19 -04:00
xfs_ag.h	xfs: lockless per-ag lookups	2010-10-18 15:07:44 -05:00
xfs_alloc.c	xfs: eliminate some newly-reported gcc warnings	2010-10-18 15:07:39 -05:00
xfs_alloc.h	xfs: do not use emums for flags used in tracing	2010-07-26 13:16:43 -05:00
xfs_alloc_btree.c	xfs: remove the ->kill_root btree operation	2010-10-18 15:07:38 -05:00
xfs_alloc_btree.h	[XFS] Always use struct xfs_btree_block instead of short / longform	2008-10-30 17:14:34 +11:00
xfs_arch.h	xfs: use generic Posix ACL code	2009-06-10 17:07:47 +02:00
xfs_attr.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_attr.h	xfs: convert attr to use unsigned names	2010-01-20 10:47:48 +11:00
xfs_attr_leaf.c	xfs: remove unused delta tracking code in xfs_bmapi	2010-07-26 13:16:39 -05:00
xfs_attr_leaf.h	[XFS] Remove macro-to-function indirections in attr code	2009-01-09 15:46:44 +11:00
xfs_attr_sf.h	xfs: convert attr to use unsigned names	2010-01-20 10:47:48 +11:00
xfs_bit.c
xfs_bit.h	[XFS] Remove macro-to-function indirections in the mask code	2009-01-09 15:53:54 +11:00
xfs_bmap.c	xfs: Introduce XFS_IOC_ZERO_RANGE	2010-10-18 15:07:25 -05:00
xfs_bmap.h	xfs: Introduce XFS_IOC_ZERO_RANGE	2010-10-18 15:07:25 -05:00
xfs_bmap_btree.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_bmap_btree.h	xfs: make several more functions static	2010-01-15 15:31:38 -06:00
xfs_btree.c	xfs: remove the ->kill_root btree operation	2010-10-18 15:07:38 -05:00
xfs_btree.h	xfs: remove the ->kill_root btree operation	2010-10-18 15:07:38 -05:00
xfs_btree_trace.c	[XFS] make btree tracing generic	2008-10-30 16:58:50 +11:00
xfs_btree_trace.h	xfs: event tracing support	2009-12-14 23:08:16 -06:00
xfs_buf_item.c	xfs: kill the b_strat callback in xfs_buf	2010-07-26 13:16:52 -05:00
xfs_buf_item.h	xfs: give li_cb callbacks the correct prototype	2010-07-26 13:16:35 -05:00
xfs_da_btree.c	xfs: fix gcc 4.6 set but not read and unused statement warnings	2010-07-26 13:16:51 -05:00
xfs_da_btree.h	xfs: convert dirnameops to unsigned char names	2010-01-20 10:47:17 +11:00
xfs_dfrag.c	xfs: simplify inode to transaction joining	2010-07-26 13:16:36 -05:00
xfs_dfrag.h	xfs: clean up inconsistent variable naming in xfs_swap_extent	2010-01-15 15:31:23 -06:00
xfs_dinode.h	xfs: remove m_litino	2009-03-29 09:51:14 +02:00
xfs_dir2.c	xfs: split xfs_itrace_entry	2010-07-26 13:16:44 -05:00
xfs_dir2.h	xfs: make xfs_dir_cilookup_result use unsigned char	2010-01-20 10:47:25 +11:00
xfs_dir2_block.c	xfs: fix gcc 4.6 set but not read and unused statement warnings	2010-07-26 13:16:51 -05:00
xfs_dir2_block.h
xfs_dir2_data.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_dir2_data.h	xfs: fix various typos	2009-03-29 09:55:42 +02:00
xfs_dir2_leaf.c	xfs: remove unused delta tracking code in xfs_bmapi	2010-07-26 13:16:39 -05:00
xfs_dir2_leaf.h
xfs_dir2_node.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_dir2_node.h	xfs: make several more functions static	2010-01-15 15:31:38 -06:00
xfs_dir2_sf.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_dir2_sf.h	[XFS] kill xfs_dinode_core_t	2008-12-01 11:37:35 +11:00
xfs_error.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_error.h	xfs: add const qualifiers to xfs error function args	2010-05-19 09:58:11 -05:00
xfs_extfree_item.c	xfs: fix the xfs_log_iovec i_addr type	2010-07-26 13:16:36 -05:00
xfs_extfree_item.h	[XFS] remove always-true #ifndef HAVE_FORMAT32 tests	2009-01-22 14:07:31 +11:00
xfs_filestream.c	xfs: clean up filestreams helpers	2010-07-26 13:16:51 -05:00
xfs_filestream.h	xfs: clean up filestreams helpers	2010-07-26 13:16:51 -05:00
xfs_fs.h	xfs: Introduce XFS_IOC_ZERO_RANGE	2010-10-18 15:07:25 -05:00
xfs_fsops.c	xfs: dummy transactions should not dirty VFS state	2010-08-24 11:46:31 +10:00
xfs_fsops.h	xfs: dummy transactions should not dirty VFS state	2010-08-24 11:46:31 +10:00
xfs_ialloc.c	xfs: fix untrusted inode number lookup	2010-08-24 11:42:30 +10:00
xfs_ialloc.h	xfs: rationalize xfs_inobt_lookup*	2009-09-01 12:45:39 -05:00
xfs_ialloc_btree.c	xfs: remove the ->kill_root btree operation	2010-10-18 15:07:38 -05:00
xfs_ialloc_btree.h	xfs: remove superflous inobt macros	2009-02-09 08:37:14 +01:00
xfs_iget.c	xfs: fix gcc 4.6 set but not read and unused statement warnings	2010-07-26 13:16:51 -05:00
xfs_inode.c	xfs: ensure we mark all inodes in a freed cluster XFS_ISTALE	2010-08-24 11:42:41 +10:00
xfs_inode.h	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_inode_item.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_inode_item.h	xfs: simplify inode to transaction joining	2010-07-26 13:16:36 -05:00
xfs_inum.h	xfs: remove XFS_INO64_OFFSET	2009-08-31 14:46:22 -05:00
xfs_iomap.c	xfs: small cleanups for xfs_iomap / __xfs_get_blocks	2010-07-26 13:16:42 -05:00
xfs_iomap.h	xfs: do not use emums for flags used in tracing	2010-07-26 13:16:43 -05:00
xfs_itable.c	xfs: remove xfs_iput	2010-07-26 13:16:44 -05:00
xfs_itable.h	xfs: remove block number from inode lookup code	2010-06-24 11:35:17 +10:00
xfs_log.c	xfs: Reduce log force overhead for delayed logging	2010-08-24 11:40:03 +10:00
xfs_log.h	xfs: remove the unused XFS_LOG_SLEEP and XFS_LOG_NOSLEEP flags	2010-07-26 13:16:38 -05:00
xfs_log_cil.c	xfs: reduce the number of CIL lock round trips during commit	2010-10-18 15:07:42 -05:00
xfs_log_priv.h	xfs: force background CIL push under sustained load	2010-09-29 07:51:03 -05:00
xfs_log_recover.c	xfs: fix the xfs_log_iovec i_addr type	2010-07-26 13:16:36 -05:00
xfs_log_recover.h	xfs: Clean up XFS_BLI_* flag namespace	2010-05-24 10:33:39 -05:00
xfs_mount.c	xfs: lockless per-ag lookups	2010-10-18 15:07:44 -05:00
xfs_mount.h	xfs: remove obsolete osyncisosync mount option	2010-07-26 13:16:51 -05:00
xfs_mru_cache.c	xfs: Kill filestreams cache flush	2010-01-15 15:34:22 -06:00
xfs_mru_cache.h	xfs: Kill filestreams cache flush	2010-01-15 15:34:22 -06:00
xfs_quota.h	xfs: removed unused XFS_QMOPT_ flags	2010-05-19 09:58:15 -05:00
xfs_refcache.h
xfs_rename.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_rtalloc.c	xfs: remove unused delta tracking code in xfs_bmapi	2010-07-26 13:16:39 -05:00
xfs_rtalloc.h	xfs: be more explicit if RT mount fails due to config	2010-05-28 14:58:24 -05:00
xfs_rw.c	xfs: remove unneeded #include statements	2010-07-26 13:16:33 -05:00
xfs_rw.h	xfs: only clear the suid bit once in xfs_write	2010-02-12 13:43:57 -06:00
xfs_sb.h	[XFS] Remove the rest of the macro-to-function indirections.	2009-01-19 14:45:55 +11:00
xfs_trans.c	xfs: unlock items before allowing the CIL to commit	2010-08-24 11:42:52 +10:00
xfs_trans.h	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_trans_ail.c	xfs: drop dmapi hooks	2010-07-26 13:16:33 -05:00
xfs_trans_buf.c	xfs: give li_cb callbacks the correct prototype	2010-07-26 13:16:35 -05:00
xfs_trans_extfree.c	xfs: simplify log item descriptor tracking	2010-07-26 13:16:34 -05:00
xfs_trans_inode.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_trans_priv.h	xfs: unlock items before allowing the CIL to commit	2010-08-24 11:42:52 +10:00
xfs_trans_space.h	xfs: remove superflous inobt macros	2009-02-09 08:37:14 +01:00
xfs_types.h	xfs: make the log ticket ID available outside the log infrastructure	2010-05-24 10:33:52 -05:00
xfs_utils.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_utils.h	xfs: simplify xfs_truncate_file	2010-07-26 13:16:52 -05:00
xfs_vnodeops.c	xfs: don't use vfs writeback for pure metadata modifications	2010-10-18 15:07:45 -05:00
xfs_vnodeops.h	xfs: kill xfs_lrw.h	2010-03-01 16:35:44 -06:00