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Darrick J. Wong e1a4e37cc7 xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent 
In a pathological scenario where we are trying to bunmapi a single
extent in which every other block is shared, it's possible that trying
to unmap the entire large extent in a single transaction can generate so
many EFIs that we overflow the transaction reservation.

Therefore, use a heuristic to guess at the number of blocks we can
safely unmap from a reflink file's data fork in an single transaction.
This should prevent problems such as the log head slamming into the tail
and ASSERTs that trigger because we've exceeded the transaction
reservation.

Note that since bunmapi can fail to unmap the entire range, we must also
teach the deferred unmap code to roll into a new transaction whenever we
get low on reservation.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
[hch: random edits, all bugs are my fault]
Signed-off-by: Christoph Hellwig <hch@lst.de>
 		2017-06-19 08:59:10 -07:00
..
libxfs xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent 2017-06-19 08:59:10 -07:00
Kconfig xfs: implement iomap based buffered write path 2016-06-21 09:53:44 +10:00
Makefile xfs: implement the GETFSMAP ioctl 2017-04-03 15:18:17 -07:00
kmem.c mm, vmalloc: use __GFP_HIGHMEM implicitly 2017-05-08 17:15:13 -07:00
kmem.h mm: introduce memalloc_nofs_{save,restore} API 2017-05-03 15:52:09 -07:00
mrlock.h
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uuid.c
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uuid.h
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xfs.h
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xfs_acl.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
xfs_acl.h xfs: Change how listxattr generates synthetic attributes 2015-12-06 21:34:16 -05:00
xfs_aops.c Changes for 4.12: 2017-05-06 11:46:16 -07:00
xfs_aops.h xfs: use iomap_dio_rw 2016-11-30 14:37:15 +11:00
xfs_attr.h xfs: several xattr functions can be void 2016-12-05 12:32:14 +11:00
xfs_attr_inactive.c xfs: make several functions static 2016-06-01 17:38:15 +10:00
xfs_attr_list.c xfs: several xattr functions can be void 2016-12-05 12:32:14 +11:00
xfs_bmap_item.c xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent 2017-06-19 08:59:10 -07:00
xfs_bmap_item.h xfs: log bmap intent items 2016-10-04 11:05:44 -07:00
xfs_bmap_util.c xfs: bad assertion for delalloc an extent that start at i_size 2017-05-16 09:24:36 -07:00
xfs_bmap_util.h xfs: remove unused full argument from bmap 2017-01-30 16:32:25 -08:00
xfs_buf.c xfs: push buffer of flush locked dquot to avoid quotacheck deadlock 2017-06-19 08:59:10 -07:00
xfs_buf.h xfs: push buffer of flush locked dquot to avoid quotacheck deadlock 2017-06-19 08:59:10 -07:00
xfs_buf_item.c xfs: reset b_first_retry_time when clear the retry status of xfs_buf_t 2017-02-03 14:39:07 -08:00
xfs_buf_item.h xfs: fix non-debug build warnings 2015-08-25 10:05:13 +10:00
xfs_dir2_readdir.c xfs: refactor dir2 leaf readahead shadow buffer cleverness 2017-06-19 08:59:10 -07:00
xfs_discard.c xfs: Allow user to kill fstrim process 2017-04-27 10:45:34 -07:00
xfs_discard.h xfs: don't block the log commit handler for discards 2017-02-09 11:36:40 -08:00
xfs_dquot.c xfs: don't wrap ID in xfs_dq_get_next_id 2017-01-17 11:43:38 -08:00
xfs_dquot.h
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xfs_dquot_item.c xfs: allocate log vector buffers outside CIL context lock 2016-07-22 09:52:35 +10:00
xfs_dquot_item.h
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xfs_error.c Merge branch 'xfs-4.8-misc-fixes-3' into for-next 2016-07-20 11:51:08 +10:00
xfs_error.h xfs: simulate per-AG reservations being critically low 2016-10-05 16:26:31 -07:00
xfs_export.c xfs: abstract block export operations from nfsd layouts 2016-07-15 15:31:29 -04:00
xfs_export.h
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xfs_extent_busy.c xfs: fix len comparison in xfs_extent_busy_trim 2017-02-16 17:20:12 -08:00
xfs_extent_busy.h xfs: improve handling of busy extents in the low-level allocator 2017-02-09 10:50:25 -08:00
xfs_extfree_item.c xfs: better log intent item refcount checking 2017-04-25 09:40:42 -07:00
xfs_extfree_item.h xfs: refactor redo intent item processing 2016-08-03 11:23:49 +10:00
xfs_file.c xfs: Move handling of missing page into one place in xfs_find_get_desired_pgoff() 2017-05-25 09:42:25 -07:00
xfs_filestream.c Merge branch 'xfs-4.9-log-recovery-fixes' into for-next 2016-10-03 09:56:28 +11:00
xfs_filestream.h
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xfs_fsmap.c xfs: only return detailed fsmap info if the caller has CAP_SYS_ADMIN 2017-05-16 12:26:16 -07:00
xfs_fsmap.h xfs: implement the GETFSMAP ioctl 2017-04-03 15:18:17 -07:00
xfs_fsops.c xfs: remove boilerplate around xfs_btree_init_block 2017-01-30 16:32:24 -08:00
xfs_fsops.h xfs: preallocate blocks for worst-case btree expansion 2016-10-05 16:26:27 -07:00
xfs_globals.c xfs: garbage collect old cowextsz reservations 2016-10-05 16:26:28 -07:00
xfs_icache.c xfs: fix spurious spin_is_locked() assert failures on non-smp kernels 2017-06-08 08:23:07 -07:00
xfs_icache.h xfs: update ag iterator to support wait on new inodes 2017-04-28 08:11:08 -07:00
xfs_icreate_item.c fs: xfs: xfs_icreate_item: constify xfs_item_ops structure 2016-11-28 14:57:42 +11:00
xfs_icreate_item.h
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xfs_inode.c xfs: drop iolock from reclaim context to appease lockdep 2017-04-12 08:43:23 -07:00
xfs_inode.h xfs: support ability to wait on new inodes 2017-04-28 08:11:08 -07:00
xfs_inode_item.c xfs: remove xfs_trans_ail_delete_bulk 2017-04-25 09:40:42 -07:00
xfs_inode_item.h xfs: remove timestamps from incore inode 2016-02-09 16:54:58 +11:00
xfs_ioctl.c xfs: fix getfsmap userspace memory corruption while setting OF_LAST 2017-04-25 09:40:42 -07:00
xfs_ioctl.h xfs: don't pass ioflags around in the ioctl path 2016-07-20 11:29:35 +10:00
xfs_ioctl32.c xfs: implement the GETFSMAP ioctl 2017-04-03 15:18:17 -07:00
xfs_ioctl32.h
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xfs_iomap.c dax, xfs, ext4: compile out iomap-dax paths in the FS_DAX=n case 2017-05-13 17:52:16 -07:00
xfs_iomap.h xfs: introduce xfs_aligned_fsb_count 2017-02-06 17:47:46 -08:00
xfs_iops.c xfs: report crtime and attribute flags to statx 2017-04-03 01:05:59 -04:00
xfs_iops.h xfs: Propagate dentry down to inode_change_ok() 2016-09-22 10:56:19 +02:00
xfs_itable.c xfs: fix kernel memory exposure problems 2017-04-03 15:18:15 -07:00
xfs_itable.h
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xfs_linux.h xfs: remove custom do_div implementations 2017-04-12 08:42:51 -07:00
xfs_log.c xfs: corruption needs to respect endianess too! 2017-04-25 09:40:42 -07:00
xfs_log.h xfs: remove unused struct declarations 2017-01-30 16:32:25 -08:00
xfs_log_cil.c xfs: don't block the log commit handler for discards 2017-02-09 11:36:40 -08:00
xfs_log_priv.h xfs: don't block the log commit handler for discards 2017-02-09 11:36:40 -08:00
xfs_log_recover.c scripts/spelling.txt: add "intialise(d)" pattern and fix typo instances 2017-05-08 17:15:13 -07:00
xfs_message.c xfs: more info from kmem deadlocks and high-level error msgs 2015-10-12 16:04:45 +11:00
xfs_message.h
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xfs_mount.c xfs: publish UUID in struct super_block 2017-04-28 08:10:53 -07:00
xfs_mount.h xfs: more do_div cleanups 2017-04-25 09:40:41 -07:00
xfs_mru_cache.c
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xfs_mru_cache.h
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xfs_ondisk.h xfs: define the on-disk refcount btree format 2016-10-03 09:11:18 -07:00
xfs_pnfs.c xfs: remove i_iolock and use i_rwsem in the VFS inode instead 2016-11-30 14:33:25 +11:00
xfs_pnfs.h xfs: remove i_iolock and use i_rwsem in the VFS inode instead 2016-11-30 14:33:25 +11:00
xfs_qm.c xfs: push buffer of flush locked dquot to avoid quotacheck deadlock 2017-06-19 08:59:10 -07:00
xfs_qm.h xfs: Split default quota limits by quota type 2016-02-08 11:27:55 +11:00
xfs_qm_bhv.c
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xfs_qm_syscalls.c xfs: wait on new inodes during quotaoff dquot release 2017-04-28 08:11:08 -07:00
xfs_quota.h xfs: fix quota block reservation leak when tp allocates and frees blocks 2015-06-01 07:15:37 +10:00
xfs_quotaops.c xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk 2016-02-08 11:27:38 +11:00
xfs_refcount_item.c xfs: better log intent item refcount checking 2017-04-25 09:40:42 -07:00
xfs_refcount_item.h xfs: log refcount intent items 2016-10-03 09:11:21 -07:00
xfs_reflink.c xfs: reserve enough blocks to handle btree splits when remapping 2017-05-03 13:21:40 -07:00
xfs_reflink.h xfs: only reclaim unwritten COW extents periodically 2017-03-07 16:45:58 -08:00
xfs_rmap_item.c xfs: better log intent item refcount checking 2017-04-25 09:40:42 -07:00
xfs_rmap_item.h xfs: convert RUI log formats to use variable length arrays 2016-09-19 10:24:27 +10:00
xfs_rtalloc.c xfs: simplify xfs_rtallocate_extent 2017-02-17 16:52:52 -08:00
xfs_rtalloc.h xfs: add a couple of queries to iterate free extents in the rtbitmap 2017-04-03 15:18:17 -07:00
xfs_stats.c xfs: make xfs btree stats less huge 2016-12-05 14:38:58 +11:00
xfs_stats.h xfs: make xfs btree stats less huge 2016-12-05 14:38:58 +11:00
xfs_super.c Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2017-05-12 15:43:10 -07:00
xfs_super.h xfs: don't block the log commit handler for discards 2017-02-09 11:36:40 -08:00
xfs_symlink.c xfs: remove i_iolock and use i_rwsem in the VFS inode instead 2016-11-30 14:33:25 +11:00
xfs_symlink.h
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xfs_sysctl.c xfs: garbage collect old cowextsz reservations 2016-10-05 16:26:28 -07:00
xfs_sysctl.h xfs: garbage collect old cowextsz reservations 2016-10-05 16:26:28 -07:00
xfs_sysfs.c xfs: resurrect debug mode drop buffered writes mechanism 2017-02-16 17:19:15 -08:00
xfs_sysfs.h xfs: configurable error behavior via sysfs 2016-05-18 10:58:51 +10:00
xfs_trace.c xfs: implement the GETFSMAP ioctl 2017-04-03 15:18:17 -07:00
xfs_trace.h xfs: push buffer of flush locked dquot to avoid quotacheck deadlock 2017-06-19 08:59:10 -07:00
xfs_trans.c Changes for 4.12: 2017-05-06 11:46:16 -07:00
xfs_trans.h xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent 2017-06-19 08:59:10 -07:00
xfs_trans_ail.c xfs: remove xfs_trans_ail_delete_bulk 2017-04-25 09:40:42 -07:00
xfs_trans_bmap.c xfs: try to avoid blowing out the transaction reservation when bunmaping a shared extent 2017-06-19 08:59:10 -07:00
xfs_trans_buf.c xfs: remove XBF_STALE flag wrapper macros 2016-02-10 15:01:11 +11:00
xfs_trans_dquot.c xfs: Split default quota limits by quota type 2016-02-08 11:27:55 +11:00
xfs_trans_extfree.c xfs: set up per-AG free space reservations 2016-09-19 10:30:52 +10:00
xfs_trans_inode.c fs: Replace current_fs_time() with current_time() 2016-09-27 21:06:22 -04:00
xfs_trans_priv.h xfs: remove xfs_trans_ail_delete_bulk 2017-04-25 09:40:42 -07:00
xfs_trans_refcount.c xfs: connect refcount adjust functions to upper layers 2016-10-03 09:11:22 -07:00
xfs_trans_rmap.c xfs: add shared rmap map/unmap/convert log item types 2016-10-05 16:26:29 -07:00
xfs_xattr.c xfs: several xattr functions can be void 2016-12-05 12:32:14 +11:00