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alistair23-linux/fs/xfs
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David Chinner 84e1e99f11 [XFS] Prevent ENOSPC from aborting transactions that need to succeed 
During delayed allocation extent conversion or unwritten extent
conversion, we need to reserve some blocks for transactions reservations.
We need to reserve these blocks in case a btree split occurs and we need
to allocate some blocks.

Unfortunately, we've only ever reserved the number of data blocks we are
allocating, so in both the unwritten and delalloc case we can get ENOSPC
to the transaction reservation. This is bad because in both cases we
cannot report the failure to the writing application.

The fix is two-fold:

1 - leverage the reserved block infrastructure XFS already
has to reserve a small pool of blocks by default to allow
specially marked transactions to dip into when we are at
ENOSPC.
Default setting is min(5%, 1024 blocks).

2 - convert critical transaction reservations to be allowed
to dip into this pool. Spots changed are delalloc
conversion, unwritten extent conversion and growing a
filesystem at ENOSPC.
This also allows growing the filesytsem to succeed at ENOSPC.

SGI-PV: 964468
SGI-Modid: xfs-linux-melb:xfs-kern:28865a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-07-14 15:35:19 +10:00
..
linux-2.6 [XFS] Map unwritten extents correctly for I/o completion processing 2007-07-14 15:32:49 +10:00
quota [XFS] Use generic shrinker interfaces in XFS. 2007-07-14 15:23:53 +10:00
support [XFS] reducing the number of random number functions. 2007-05-08 13:49:03 +10:00
Kbuild
Kconfig
Makefile
Makefile-linux-2.6
xfs.h
xfs_acl.c
xfs_acl.h
xfs_ag.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc_btree.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc_btree.h
xfs_arch.h
xfs_attr.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_attr.h
xfs_attr_leaf.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_attr_leaf.h
xfs_attr_sf.h
xfs_behavior.c
xfs_behavior.h
xfs_bit.c
xfs_bit.h
xfs_bmap.c [XFS] xfs_bmapi fails to update the previous extent pointer 2007-07-14 15:29:37 +10:00
xfs_bmap.h
xfs_bmap_btree.c
xfs_bmap_btree.h
xfs_btree.c
xfs_btree.h
xfs_buf_item.c
xfs_buf_item.h
xfs_clnt.h
xfs_da_btree.c
xfs_da_btree.h
xfs_dfrag.c [XFS] propogate return codes from flush routines 2007-05-08 13:49:27 +10:00
xfs_dfrag.h
xfs_dinode.h
xfs_dir2.c
xfs_dir2.h
xfs_dir2_block.c [XFS] the "aendp" arg to xfs_dir2_data_freescan is always NULL, remove it. 2007-05-08 13:48:49 +10:00
xfs_dir2_block.h
xfs_dir2_data.c [XFS] the "aendp" arg to xfs_dir2_data_freescan is always NULL, remove it. 2007-05-08 13:48:49 +10:00
xfs_dir2_data.h [XFS] the "aendp" arg to xfs_dir2_data_freescan is always NULL, remove it. 2007-05-08 13:48:49 +10:00
xfs_dir2_leaf.c [XFS] the "aendp" arg to xfs_dir2_data_freescan is always NULL, remove it. 2007-05-08 13:48:49 +10:00
xfs_dir2_leaf.h
xfs_dir2_node.c [XFS] the "aendp" arg to xfs_dir2_data_freescan is always NULL, remove it. 2007-05-08 13:48:49 +10:00
xfs_dir2_node.h
xfs_dir2_sf.c
xfs_dir2_sf.h
xfs_dir2_trace.c
xfs_dir2_trace.h
xfs_dmapi.h
xfs_dmops.c
xfs_error.c [XFS] reducing the number of random number functions. 2007-05-08 13:49:03 +10:00
xfs_error.h
xfs_extfree_item.c
xfs_extfree_item.h
xfs_fs.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_fsops.c [XFS] Prevent ENOSPC from aborting transactions that need to succeed 2007-07-14 15:35:19 +10:00
xfs_fsops.h
xfs_ialloc.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_ialloc.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_ialloc_btree.c
xfs_ialloc_btree.h
xfs_iget.c [XFS] Add lockdep support for XFS 2007-05-08 13:50:19 +10:00
xfs_imap.h
xfs_inode.c [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. 2007-05-08 13:49:46 +10:00
xfs_inode.h [XFS] Add lockdep support for XFS 2007-05-08 13:50:19 +10:00
xfs_inode_item.c
xfs_inode_item.h
xfs_inum.h
xfs_iocore.c [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. 2007-05-08 13:49:46 +10:00
xfs_iomap.c [XFS] Prevent ENOSPC from aborting transactions that need to succeed 2007-07-14 15:35:19 +10:00
xfs_iomap.h [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. 2007-05-08 13:49:46 +10:00
xfs_itable.c Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
xfs_itable.h
xfs_log.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_log.h
xfs_log_priv.h
xfs_log_recover.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_log_recover.h
xfs_mount.c [XFS] Prevent ENOSPC from aborting transactions that need to succeed 2007-07-14 15:35:19 +10:00
xfs_mount.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_qmops.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_quota.h [XFS] Fix uquota and oquota enforcement problems. 2007-05-08 13:49:33 +10:00
xfs_refcache.h
xfs_rename.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_rtalloc.c [XFS] Don't grow filesystems past the size they can index. 2007-07-14 15:21:29 +10:00
xfs_rtalloc.h
xfs_rw.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_rw.h [XFS] Make hole punching at EOF atomic. 2007-07-14 15:23:40 +10:00
xfs_sb.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_trans.c [XFS] Apply transaction delta counts atomically to incore counters 2007-07-14 15:32:09 +10:00
xfs_trans.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_trans_ail.c
xfs_trans_buf.c
xfs_trans_extfree.c
xfs_trans_inode.c
xfs_trans_item.c
xfs_trans_priv.h
xfs_trans_space.h
xfs_types.h
xfs_utils.c [XFS] propogate return codes from flush routines 2007-05-08 13:49:27 +10:00
xfs_utils.h
xfs_vfsops.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_vnodeops.c [XFS] Make hole punching at EOF atomic. 2007-07-14 15:23:40 +10:00