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authorJan Schmidt <list.btrfs@jan-o-sch.net>2012-05-29 15:06:54 (GMT)
committerJan Schmidt <list.btrfs@jan-o-sch.net>2012-05-30 16:18:21 (GMT)
commit95a06077f7edbd00d32612562be4d857a5b7df54 (patch)
tree664ff2a92a2de3ba96be5a49ac36531d933ee5eb /mm/msync.c
parent20b297d620cd1bb94127942bbb3702fb7b1030b2 (diff)
downloadlinux-fsl-qoriq-95a06077f7edbd00d32612562be4d857a5b7df54.tar.xz
Btrfs: use delayed ref sequence numbers for all fs-tree updates
The sequence number for delayed refs is needed to postpone certain delayed refs for a very short period while walking backrefs. Before the tree modification log, we thought we'd only have to hold back those references that don't have a counter operation. While now we've the tree mod log, we're rewinding fs tree blocks to a defined consistent state. We cannot know in advance for which tree block we'll be doing rewind operations later. Therefore, we must postpone all the delayed refs for fs-tree blocks, even those having a counter operation. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
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