Message ID | 1373665514-709-1-git-send-email-tytso@mit.edu |
---|---|
State | Accepted, archived |
Headers | show |
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 3d99b18..cc4731fd 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2861,6 +2861,9 @@ again: err = PTR_ERR(bh); break; } + /* Yield here to deal with large extent trees. Should be + * a no-op if we did IO for the above sb_bread. */ + cond_resched(); if (WARN_ON(i + 1 > depth)) { err = -EIO; break;
During large unlink operations on files with extents, we can use a lot of CPU time. This adds a cond_resched() call when starting to examine the next level of a multi-level extent tree. Multi-level extent trees are rare in the first place, and this should rarely be executed. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> --- fs/ext4/extents.c | 3 +++ 1 file changed, 3 insertions(+)