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0647bf564f
linux/fs/btrfs
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Wang Shilong 0647bf564f Btrfs: improve forever loop when doing balance relocation 
We hit a forever loop when doing balance relocation,the reason
is that we firstly reserve 4M(node size is 16k).and within transaction
we will try to add extra reservation for snapshot roots,this will
return -EAGAIN if there has been a thread flushing space to reserve
space.We will do this again and again with filesystem becoming nearly
full.

If the above '-EAGAIN' case happens, we try to refill reservation more
outsize of transaction, and this will return eariler in enospc case,however,
this dosen't really hurt because it makes no sense doing balance relocation
with the filesystem nearly full.

Miao Xie helped a lot to track this issue, thanks.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
2014-01-28 13:19:43 -08:00
..
tests Btrfs: add a sanity test for a vacant extent at the front of a file 2013-11-11 21:58:19 -05:00
acl.c Btrfs: fix incorrect inode acl reset 2013-11-11 22:02:51 -05:00
async-thread.c Btrfs: fix __btrfs_start_workers retval 2013-11-20 20:42:11 -05:00
async-thread.h Btrfs: eliminate races in worker stopping code 2013-10-04 16:02:13 -04:00
backref.c btrfs: bootstrap generic btrfs_find_item interface 2014-01-28 13:19:36 -08:00
backref.h Btrfs: allocate prelim_ref with a slab allocater 2013-09-01 08:16:27 -04:00
btrfs_inode.h Btrfs: improve inode hash function/inode lookup 2013-11-11 21:55:19 -05:00
check-integrity.c Btrfs: fix check-integrity to look at the referenced data properly 2014-01-28 13:19:21 -08:00
check-integrity.h block: submit_bio_wait() conversions 2013-11-24 16:33:41 -07:00
compression.c btrfs: Fix checkpatch.pl warning of spacing issues 2013-11-11 22:12:31 -05:00
compression.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ctree.c btrfs: expand btrfs_find_item() to include find_orphan_item functionality 2014-01-28 13:19:37 -08:00
ctree.h Btrfs: make btrfs_debug match pr_debug handling related to DEBUG 2014-01-28 13:19:39 -08:00
delayed-inode.c btrfs: Replace kmalloc with kmalloc_array 2013-11-11 22:12:22 -05:00
delayed-inode.h [readdir] convert btrfs 2013-06-29 12:57:00 +04:00
delayed-ref.c Btrfs: skip merge part for delayed data refs 2014-01-28 13:19:23 -08:00
delayed-ref.h Btrfs: introduce a head ref rbtree 2014-01-28 13:19:22 -08:00
dev-replace.c btrfs: fix typo in the log message 2013-11-20 20:44:47 -05:00
dev-replace.h Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
dir-item.c Btrfs: fix verification of dir_item 2013-11-11 22:10:36 -05:00
disk-io.c btrfs: expand btrfs_find_item() to include find_orphan_item functionality 2014-01-28 13:19:37 -08:00
disk-io.h Btrfs: add a sanity test for btrfs_split_item 2013-11-11 21:51:02 -05:00
export.c btrfs: remove fs/btrfs/compat.h 2013-11-11 22:03:19 -05:00
export.h
extent_io.c btrfs: remove unused variables from extent_io.c 2014-01-28 13:19:33 -08:00
extent_io.h Btrfs: Simplify the logic in alloc_extent_buffer() for existing extent buffer case 2013-11-11 21:59:11 -05:00
extent_map.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
extent_map.h btrfs: Enclose macros with complex values within parenthesis 2013-11-11 22:12:06 -05:00
extent-tree.c btrfs: remove unused variable from find_free_extent 2014-01-28 13:19:32 -08:00
file-item.c btrfs: Use WARN_ON()'s return value in place of WARN_ON(1) 2013-11-11 22:11:53 -05:00
file.c Btrfs: fix ordered extent check in btrfs_punch_hole 2014-01-28 13:19:42 -08:00
free-space-cache.c btrfs: remove unused variable from setup_cluster_no_bitmap 2014-01-28 13:19:33 -08:00
free-space-cache.h Btrfs: remove path arg from btrfs_truncate_free_space_cache 2013-11-11 21:51:33 -05:00
hash.h btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-item.c btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index' 2014-01-28 13:19:39 -08:00
inode-map.c btrfs: Use WARN_ON()'s return value in place of WARN_ON(1) 2013-11-11 22:11:53 -05:00
inode-map.h
inode.c btrfs: expand btrfs_find_item() to include find_root_ref functionality 2014-01-28 13:19:36 -08:00
ioctl.c btrfs: add ioctl to export size of global metadata reservation 2014-01-28 13:19:28 -08:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-11-22 08:38:55 -08:00
locking.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
locking.h Btrfs: remove btrfs_try_spin_lock 2013-03-14 14:57:10 -04:00
lzo.c Btrfs: return -1 when lzo compression makes data bigger 2013-09-01 07:57:19 -04:00
Makefile Btrfs: add tests for btrfs_get_extent 2013-11-11 21:57:30 -05:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: fix list delete warning when removing ordered root from the list 2013-11-20 20:44:46 -05:00
ordered-data.h Btrfs: don't wait for the completion of all the ordered extents 2013-11-11 22:13:44 -05:00
orphan.c btrfs: expand btrfs_find_item() to include find_orphan_item functionality 2014-01-28 13:19:37 -08:00
print-tree.c btrfs: drop unused parameter from btrfs_item_nr 2013-11-11 21:50:48 -05:00
print-tree.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
qgroup.c btrfs: fix unused variables in qgroup.c 2014-01-28 13:19:35 -08:00
raid56.c btrfs: remove fs/btrfs/compat.h 2013-11-11 22:03:19 -05:00
raid56.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
rcu-string.h Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
reada.c Btrfs: fix reada debug code compilation 2013-05-06 15:54:55 -04:00
relocation.c Btrfs: improve forever loop when doing balance relocation 2014-01-28 13:19:43 -08:00
root-tree.c btrfs: expand btrfs_find_item() to include find_root_ref functionality 2014-01-28 13:19:36 -08:00
scrub.c btrfs: remove unused variable from scrub_fixup_nodatasum 2014-01-28 13:19:34 -08:00
send.c Btrfs: incompatible format change to remove hole extents 2014-01-28 13:19:21 -08:00
send.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: don't clear the default compression type 2013-12-12 07:11:19 -08:00
sysfs.c btrfs: replace BUG in can_modify_feature 2014-01-28 13:19:41 -08:00
sysfs.h btrfs: publish allocation data in sysfs 2014-01-28 13:19:29 -08:00
transaction.c Btrfs: introduce a head ref rbtree 2014-01-28 13:19:22 -08:00
transaction.h Btrfs: fix BUG_ON() casued by the reserved space migration 2013-11-11 21:54:28 -05:00
tree-defrag.c Btrfs: cleanup dead code of defragment 2013-11-11 21:59:45 -05:00
tree-log.c btrfs: expand btrfs_find_item() to include find_orphan_item functionality 2014-01-28 13:19:37 -08:00
tree-log.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ulist.c Btrfs: fix crash regarding to ulist_add_merge 2013-07-02 11:50:59 -04:00
ulist.h Btrfs: add a rb_tree to improve performance of ulist search 2013-05-06 15:54:44 -04:00
uuid-tree.c Btrfs: remove unused max_key arg from btrfs_search_forward 2013-11-11 21:54:57 -05:00
volumes.c btrfs: fix bio_size_ok() for max_sectors > 0xffff 2013-11-20 20:48:44 -05:00
volumes.h btrfs: Pack struct btrfs_device 2013-11-11 22:11:26 -05:00
xattr.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
xattr.h
zlib.c btrfs: fix message printing 2012-10-09 09:19:57 -04:00