btrfs: skip superblocks during discard

[email protected] linux-btrfs 1 version Jun 11, 2015 In review

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#	Subject and files	Size	Replies
1/4	btrfs: skip superblocks during discard`fs/btrfs/extent-tree.c`	+44 -6	9 replies
2/4	btrfs: iterate over unused chunk space in FITRIM`fs/btrfs/extent-tree.c` `fs/btrfs/volumes.c` `fs/btrfs/volumes.h`	+141 ~~-23~~	0 replies
3/4	btrfs: explictly delete unused block groups in close_ctree and ro-remount`fs/btrfs/disk-io.c` `fs/btrfs/super.c`	+20 -0	0 replies
4/4	btrfs: add missing discards when unpinning extents with -o discard`fs/btrfs/ctree.h` `fs/btrfs/extent-tree.c` `fs/btrfs/free-space-cache.c` +3 more	+106 ~~-29~~	0 replies

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