AcoSail/kernel_optimize_test
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4be536debe
kernel_optimize_test/fs/xfs
History
David Chinner 4be536debe [XFS] Prevent free space oversubscription and xfssyncd looping. 
The fix for recent ENOSPC deadlocks introduced certain limitations on
allocations. The fix could cause xfssyncd to loop endlessly if we did not
leave some space free for the allocator to work correctly. Basically, we
needed to ensure that we had at least 4 blocks free for an AG free list
and a block for the inode bmap btree at all times.

However, this did not take into account the fact that each AG has a free
list that needs 4 blocks. Hence any filesystem with more than one AG could
cause oversubscription of free space and make xfssyncd spin forever trying
to allocate space needed for AG freelists that was not available in the
AG.

The following patch reserves space for the free lists in all AGs plus the
inode bmap btree which prevents oversubscription. It also prevents those
blocks from being reported as free space (as they can never be used) and
makes the SMP in-core superblock accounting code and the reserved block
ioctl respect this requirement.

SGI-PV: 955674
SGI-Modid: xfs-linux-melb:xfs-kern:26894a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: David Chatterton <chatz@sgi.com>
2006-09-07 14:26:50 +10:00
..
linux-2.6 [XFS] Fix a barrier related forced shutdown on mounts with quota enabled. 2006-07-28 17:05:13 +10:00
quota [XFS] All xfs_disk_dquot_t values are (as the name says) disk endian. 2006-07-28 17:04:26 +10:00
support
Kbuild
Kconfig
Makefile
Makefile-linux-2.6 [XFS] Remove files from the build that are now unused. 2006-06-20 14:53:51 +10:00
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_ag.h
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
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_arch.h
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_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_behavior.c
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
xfs_bit.h
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
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
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
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
xfs_cap.h
xfs_clnt.h
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
xfs_dinode.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
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
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
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
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
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
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_dmapi.h
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
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_fs.h
xfs_fsops.c [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
xfs_fsops.h
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
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
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
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.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_inum.h
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
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_log_priv.h
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
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
xfs_mac.h
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_refcache.h
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
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_sb.h
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_trans_priv.h
xfs_trans_space.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
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_types.h
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_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
xfs.h