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Nathan Scott f07c225036 [XFS] Improve xfsbufd delayed write submission patterns, after blktrace 
analysis.

Under a sequential create+allocate workload, blktrace reported backward
writes being issued by xfsbufd, and frequent inappropriate queue unplugs.
We now insert at the tail when moving from the delwri lists to the temp
lists, which maintains correct ordering, and we avoid unplugging queues
deep in the submit paths when we'd shortly do it at a higher level anyway.
blktrace now reports much healthier write patterns from xfsbufd for this
workload (and likely many others).

SGI-PV: 954310
SGI-Modid: xfs-linux-melb:xfs-kern:26396a

Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
 		2006-09-28 10:52:15 +10:00
..
linux-2.6 [XFS] Improve xfsbufd delayed write submission patterns, after blktrace 2006-09-28 10:52:15 +10:00
quota [XFS] Fix a bad pointer dereference in the quota statvfs handling. 2006-09-07 14:27:23 +10:00
support [XFS] Portability changes: remove prdev, stick to one diagnostic 2006-06-09 15:29:40 +10:00
Kbuild
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Kconfig [XFS] Remove unneeded conditional code on NFS export interface related 2006-06-19 08:40:27 +10:00
Makefile
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Makefile-linux-2.6 [XFS] Remove files from the build that are now unused. 2006-06-20 14:53:51 +10:00
xfs.h
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xfs_acl.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_acl.h [XFS] Resolve a namespace collision on remaining vtypes for FreeBSD 2006-06-09 17:07:12 +10:00
xfs_ag.h
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xfs_alloc.c [XFS] Fix xfs_free_extent related NULL pointer dereference. 2006-08-10 14:40:41 +10:00
xfs_alloc.h [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
xfs_alloc_btree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_alloc_btree.h
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xfs_arch.h
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xfs_attr.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_attr.h [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters. 2006-06-09 17:00:52 +10:00
xfs_attr_leaf.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_attr_leaf.h
…
xfs_attr_sf.h
…
xfs_behavior.c
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xfs_behavior.h [XFS] remove unused behaviour lock - shrink XFS vnode as a side effect. 2006-06-27 16:12:15 +10:00
xfs_bit.c
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xfs_bit.h
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xfs_bmap.c [XFS] Fix char size overflow in bmap_alloc call for unwritten extent 2006-08-30 13:41:58 +10:00
xfs_bmap.h
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xfs_bmap_btree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_bmap_btree.h
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xfs_btree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_btree.h
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xfs_buf_item.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_buf_item.h
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xfs_cap.h [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters. 2006-06-09 17:00:52 +10:00
xfs_clnt.h
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xfs_da_btree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_da_btree.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dfrag.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dfrag.h
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xfs_dinode.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_block.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_block.h
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xfs_dir2_data.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_data.h
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xfs_dir2_leaf.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_leaf.h
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xfs_dir2_node.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_node.h
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xfs_dir2_sf.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_sf.h
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xfs_dir2_trace.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_trace.h
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xfs_dmapi.h [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters. 2006-06-09 16:48:30 +10:00
xfs_dmops.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_error.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_error.h
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xfs_extfree_item.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_extfree_item.h [XFS] inode items and EFI/EFDs have different ondisk format for 32bit and 2006-06-09 14:55:38 +10:00
xfs_fs.h [XFS] Add degframentation exclusion support 2006-06-09 14:54:19 +10:00
xfs_fsops.c [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
xfs_fsops.h
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xfs_ialloc.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_ialloc.h
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xfs_ialloc_btree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_ialloc_btree.h
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xfs_iget.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_imap.h
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xfs_inode.c [XFS] Ensure bulkstat from an invalid inode number gets caught always with 2006-07-28 17:05:51 +10:00
xfs_inode.h [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters. 2006-06-09 17:00:52 +10:00
xfs_inode_item.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_inode_item.h [XFS] inode items and EFI/EFDs have different ondisk format for 32bit and 2006-06-09 14:55:38 +10:00
xfs_inum.h
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xfs_iocore.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_iomap.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_iomap.h
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xfs_itable.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_itable.h [XFS] Remove dead code from come bulkstat paths. 2006-06-09 15:29:22 +10:00
xfs_log.c [XFS] Fix remount vs no/barrier options by ensuring we clear unwanted 2006-07-28 17:04:44 +10:00
xfs_log.h
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xfs_log_priv.h
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xfs_log_recover.c [XFS] Rework code snippets slightly to remove remaining recent-gcc 2006-06-28 10:13:52 +10:00
xfs_log_recover.h
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xfs_mac.h
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xfs_mount.c [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
xfs_mount.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_qmops.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_quota.h [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters. 2006-06-09 16:48:30 +10:00
xfs_refcache.h
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xfs_rename.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_rtalloc.c [XFS] Fix realtime subvolume expansion, a porting bug b0rked it. Coverity 2006-06-28 08:42:26 +10:00
xfs_rtalloc.h
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xfs_rw.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_rw.h [XFS] Push some common code out of write path into core XFS code for 2006-06-19 08:39:53 +10:00
xfs_sb.h
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xfs_trans.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans.h [XFS] Reduce size of xfs_trans_t structure. * remove ->t_forw, ->t_back -- 2006-06-27 16:12:40 +10:00
xfs_trans_ail.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans_buf.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans_extfree.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans_inode.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans_item.c [XFS] Portability changes: remove prdev, stick to one diagnostic 2006-06-09 15:29:40 +10:00
xfs_trans_priv.h
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xfs_trans_space.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_types.h
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xfs_utils.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_utils.h [XFS] Resolve a namespace collision on remaining vtypes for FreeBSD 2006-06-09 17:07:12 +10:00
xfs_vfsops.c [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
xfs_vnodeops.c [XFS] link(2) on directory is banned in VFS. 2006-06-27 12:45:17 +10:00