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| author | Filipe Manana <fdmanana@suse.com> | 2022-02-17 12:12:05 +0000 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-03-14 13:13:52 +0100 |
| commit | 96acb3753e0740e0a3148640927dcf3249f09f5d (patch) | |
| tree | 3fb5e6b96c7ad3f8cb699ed43804f9dc01fe6902 | |
| parent | 5b7ce5e287f030d1d3c799abea769b1a308067ba (diff) | |
| download | linux-96acb3753e0740e0a3148640927dcf3249f09f5d.tar.bz2 | |
btrfs: voluntarily relinquish cpu when doing a full fsync
Doing a full fsync may require processing many leaves of metadata, which
can take some time and result in a task monopolizing a cpu for too long.
So add a cond_resched() after processing a leaf when doing a full fsync,
while not holding any locks on any tree (a subvolume or a log tree).
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/tree-log.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 0b841eab6169..b6abc716aff2 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -5712,6 +5712,13 @@ next_key: } else { break; } + + /* + * We may process many leaves full of items for our inode, so + * avoid monopolizing a cpu for too long by rescheduling while + * not holding locks on any tree. + */ + cond_resched(); } if (ins_nr) { ret = copy_items(trans, inode, dst_path, path, ins_start_slot, |