Hi! > [ Upstream commit a7f8b1c2ac21bf081b41264c9cfd6260dffa6246 ] > > The incoming qgroup reserved space timing will move the data reservation > to ordered extent completely. > > However in btrfs_punch_hole_lock_range() will call > btrfs_invalidate_page(), which will clear QGROUP_RESERVED bit for the > range. > > In current stage it's OK, but if we're making ordered extents handle the > reserved space, then btrfs_punch_hole_lock_range() can clear the > QGROUP_RESERVED bit before we submit ordered extent, leading to qgroup > reserved space leakage. > > So here change the timing to make reserve data space after > btrfs_punch_hole_lock_range(). > The new timing is fine for either current code or the new code.
I'm not sure why this is queued for -stable. It is preparation for
future work, and that work is not queued for -stable.
Best regards,
Pavel
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