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Dave Chinner 9d7fef74b2 xfs: inform the xfsaild of the push target before sleeping 
When trying to reserve log space, we find the amount of space
we need, then go to sleep waiting for space. When we are
woken, we try to push the tail of the log forward to make
sure we have space available.

Unfortunately, this means that if there is not space available, and
everyone who needs space goes to sleep there is no-one left to push
the tail of the log to make space available. Once we have a thread
waiting for space to become available, the others queue up behind
it in a FIFO, and none of them push the tail of the log.

This can result in everyone going to sleep in xlog_grant_log_space()
if the first sleeper races with the last I/O that moves the tail
of the log forward. With no further I/O tomove the tail of the log,
there is nothing to wake the sleepers and hence all transactions
just stop.

Fix this by making sure the xfsaild will create enough space for the
transaction that is about to sleep by moving the push target far
enough forwards to ensure that that the curent proceeees will have
enough space available when it is woken. That is, we push the
AIL before we go to sleep.

Because we've inserted the log ticket into the queue before we've
pushed and gone to sleep, subsequent transactions will wait behind
this one. Hence we are guaranteed to have space available when we
are woken.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 		2009-04-06 18:42:59 +02:00
..
linux-2.6 xfs: prevent unwritten extent conversion from blocking I/O completion 2009-04-06 18:42:11 +02:00
quota xfs: kill mutex_t typedef 2009-03-29 09:51:00 +02:00
support xfs: cleanup uuid handling 2009-03-30 10:21:31 +02:00
Kconfig xfs: fix dentry aliasing issues in open_by_handle 2009-01-19 02:02:57 +01:00
Makefile xfs: get rid of indirections in the quotaops implementation 2009-02-09 08:47:34 +01:00
xfs.h [XFS] make btree tracing generic 2008-10-30 16:55:13 +11:00
xfs_acl.c CRED: Wrap task credential accesses in the XFS filesystem 2008-11-14 10:39:04 +11:00
xfs_acl.h Revert "xfs: increase the maximum number of supported ACL entries" 2009-03-31 00:23:37 -05:00
xfs_ag.h xfs: remove uchar_t/ushort_t/uint_t/ulong_t types 2009-02-09 08:37:39 +01:00
xfs_alloc.c xfs: factor out code to find the longest free extent in the AG 2009-03-16 08:29:46 +01:00
xfs_alloc.h xfs: factor out code to find the longest free extent in the AG 2009-03-16 08:29:46 +01:00
xfs_alloc_btree.c [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
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] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_attr.c [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_attr.h [XFS] Move attr log alloc size calculator to another function. 2008-08-13 16:03:35 +10:00
xfs_attr_leaf.c xfs: remove m_attroffset 2009-03-29 19:26:46 +02:00
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] 2008-07-28 16:58:35 +10:00
xfs_bit.c [XFS] Use the generic bitops rather than implementing them ourselves. 2008-08-13 15:41:12 +10:00
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: remove m_attroffset 2009-03-29 19:26:46 +02:00
xfs_bmap.h xfs: remove m_attroffset 2009-03-29 19:26:46 +02:00
xfs_bmap_btree.c [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_bmap_btree.h [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_btree.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_btree.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_btree_trace.c [XFS] make btree tracing generic 2008-10-30 16:58:50 +11:00
xfs_btree_trace.h [XFS] make btree tracing generic 2008-10-30 16:58:50 +11:00
xfs_buf_item.c [XFS] Remove XFS_BUF_SHUT() and friends 2008-12-22 17:52:58 +11:00
xfs_buf_item.h [XFS] Fix up sparse warnings. 2008-02-07 18:14:38 +11:00
xfs_da_btree.c xfs: remove uchar_t/ushort_t/uint_t/ulong_t types 2009-02-09 08:37:39 +01:00
xfs_da_btree.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_dfrag.c xfs: reject swapext ioctl on swapfiles 2009-02-12 19:56:00 +01:00
xfs_dfrag.h [XFS] Move copy_from_user calls out of ioctl helpers into ioctl switch. 2008-12-02 17:08:01 +11:00
xfs_dinode.h xfs: remove m_litino 2009-03-29 09:51:14 +02:00
xfs_dir2.c xfs: move declaration to header file 2009-03-06 17:20:15 -06:00
xfs_dir2.h [XFS] Return case-insensitive match for dentry cache 2008-07-28 16:58:40 +10:00
xfs_dir2_block.c xfs: kill ino64 mount option 2009-03-29 09:51:08 +02:00
xfs_dir2_block.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_data.c [XFS] Name operation vector for hash and compare 2008-07-28 16:58:36 +10:00
xfs_dir2_data.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_dir2_leaf.c xfs: kill ino64 mount option 2009-03-29 09:51:08 +02:00
xfs_dir2_leaf.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_node.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_dir2_node.h [XFS] Reduce shouting by removing unnecessary macros from dir2 code. 2007-07-14 15:37:02 +10:00
xfs_dir2_sf.c xfs: kill ino64 mount option 2009-03-29 09:51:08 +02:00
xfs_dir2_sf.h [XFS] kill xfs_dinode_core_t 2008-12-01 11:37:35 +11:00
xfs_dir2_trace.c [XFS] Add op_flags field and helpers to xfs_da_args 2008-07-28 16:58:37 +10:00
xfs_dir2_trace.h
…
xfs_dmapi.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
xfs_dmops.c [XFS] kill struct xfs_mount_args 2008-10-30 17:53:24 +11:00
xfs_error.c [XFS] avoid memory allocations in xfs_fs_vcmn_err 2008-12-22 18:02:01 +11:00
xfs_error.h [XFS] avoid memory allocations in xfs_fs_vcmn_err 2008-12-22 18:02:01 +11:00
xfs_extfree_item.c [XFS] Finish removing the mount pointer from the AIL API 2008-10-30 17:39:58 +11:00
xfs_extfree_item.h [XFS] remove always-true #ifndef HAVE_FORMAT32 tests 2009-01-22 14:07:31 +11:00
xfs_filestream.c xfs: factor out code to find the longest free extent in the AG 2009-03-16 08:29:46 +01:00
xfs_filestream.h [XFS] Concurrent Multi-File Data Streams 2007-07-14 15:40:53 +10:00
xfs_fs.h filesystem freeze: remove XFS specific ioctl interfaces for freeze feature 2009-01-09 16:54:42 -08:00
xfs_fsops.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_fsops.h filesystem freeze: add error handling of write_super_lockfs/unlockfs 2009-01-09 16:54:42 -08:00
xfs_ialloc.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_ialloc.h [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_ialloc_btree.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_ialloc_btree.h xfs: remove superflous inobt macros 2009-02-09 08:37:14 +01:00
xfs_iget.c xfs: fix double free of inode 2009-04-06 18:40:17 +02:00
xfs_inode.c xfs: sanity check attr fork size 2009-01-19 02:04:16 +01:00
xfs_inode.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_inode_item.c [XFS] embededd struct xfs_imap into xfs_inode 2008-12-01 11:38:08 +11:00
xfs_inode_item.h [XFS] remove always-true #ifndef HAVE_FORMAT32 tests 2009-01-22 14:07:31 +11:00
xfs_inum.h
…
xfs_iomap.c [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_iomap.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_itable.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_itable.h [XFS] Fix xfs_bulkstat_one size checks & error handling 2008-12-02 17:16:03 +11:00
xfs_log.c xfs: inform the xfsaild of the push target before sleeping 2009-04-06 18:42:59 +02:00
xfs_log.h xfs: cleanup log unmount handling 2009-03-16 08:19:29 +01:00
xfs_log_priv.h xfs: cleanup xlog_bread 2009-03-16 08:24:13 +01:00
xfs_log_recover.c xfs: cleanup xlog_bread 2009-03-16 08:24:13 +01:00
xfs_log_recover.h
…
xfs_mount.c xfs: cleanup uuid handling 2009-03-30 10:21:31 +02:00
xfs_mount.h xfs: remove m_attroffset 2009-03-29 19:26:46 +02:00
xfs_mru_cache.c [XFS] streamline init/exit path 2008-07-28 16:59:25 +10:00
xfs_mru_cache.h [XFS] On-demand reaping of the MRU cache 2007-09-17 16:42:02 +10:00
xfs_qmops.c xfs: get rid of indirections in the quotaops implementation 2009-02-09 08:47:34 +01:00
xfs_quota.h xfs: get rid of indirections in the quotaops implementation 2009-02-09 08:47:34 +01:00
xfs_refcache.h [XFS] Cleanup cosmetic differences between source trees. 2005-11-03 16:14:31 +11:00
xfs_rename.c [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_rtalloc.c xfs: make sure to free the real-time inodes in the mount error path 2009-02-04 09:33:58 +01:00
xfs_rtalloc.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_rw.c [XFS] replace b_fspriv with b_mount 2008-12-11 13:13:33 +11:00
xfs_rw.h [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_sb.h [XFS] Remove the rest of the macro-to-function indirections. 2009-01-16 17:10:42 +11:00
xfs_trans.c [XFS] Fix double free of log tickets 2008-11-17 17:37:10 +11:00
xfs_trans.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_trans_ail.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_trans_buf.c [XFS] Finish removing the mount pointer from the AIL API 2008-10-30 17:39:58 +11:00
xfs_trans_extfree.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_trans_inode.c use xfs_trans_ijoin in xfs_trans_iget 2008-12-04 15:39:23 +11:00
xfs_trans_item.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_trans_priv.h [XFS] Finish removing the mount pointer from the AIL API 2008-10-30 17:39:58 +11:00
xfs_trans_space.h xfs: remove superflous inobt macros 2009-02-09 08:37:14 +01:00
xfs_types.h xfs: remove uchar_t/ushort_t/uint_t/ulong_t types 2009-02-09 08:37:39 +01:00
xfs_utils.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_utils.h [XFS] implement IHOLD/IRELE directly 2008-08-13 16:13:45 +10:00
xfs_vnodeops.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_vnodeops.h xfs: merge xfs_mkdir into xfs_create 2009-02-09 08:38:02 +01:00