ext4: yield during large unlinks
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>
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@ -2835,6 +2835,9 @@ again:
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err = -EIO;
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break;
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}
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/* Yield here to deal with large extent trees.
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* Should be a no-op if we did IO above. */
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cond_resched();
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if (WARN_ON(i + 1 > depth)) {
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err = -EIO;
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break;
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