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| author | Jeff Mahoney <jeffm@suse.com> | 2015-06-15 15:41:19 +0200 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-07-29 17:15:29 +0200 |
| commit | e33e17ee1098d8d751552ac11c111e1c1a3db014 (patch) | |
| tree | 49b4c9b5c4123db86d9256a5b9122da73275d730 /fs/btrfs/transaction.h | |
| parent | btrfs: explictly delete unused block groups in close_ctree and ro-remount (diff) | |
| download | linux-e33e17ee1098d8d751552ac11c111e1c1a3db014.tar.xz linux-e33e17ee1098d8d751552ac11c111e1c1a3db014.zip | |
btrfs: add missing discards when unpinning extents with -o discard
When we clear the dirty bits in btrfs_delete_unused_bgs for extents
in the empty block group, it results in btrfs_finish_extent_commit being
unable to discard the freed extents.
The block group removal patch added an alternate path to forget extents
other than btrfs_finish_extent_commit. As a result, any extents that
would be freed when the block group is removed aren't discarded. In my
test run, with a large copy of mixed sized files followed by removal, it
left nearly 2/3 of extents undiscarded.
To clean up the block groups, we add the removed block group onto a list
that will be discarded after transaction commit.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
| -rw-r--r-- | fs/btrfs/transaction.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index eb09c2067fa8..edc2fbc262d7 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -74,6 +74,8 @@ struct btrfs_transaction { */ struct mutex cache_write_mutex; spinlock_t dirty_bgs_lock; + struct list_head deleted_bgs; + spinlock_t deleted_bgs_lock; struct btrfs_delayed_ref_root delayed_refs; int aborted; int dirty_bg_run; |