https://github.com/torvalds/linux
Revision 32c00aff718bb54a214b39146bdd9ac01511cd25 authored by Josef Bacik on 08 October 2009, 17:34:05 UTC, committed by Chris Mason on 08 October 2009, 19:21:10 UTC
This patch fixes an issue with the delalloc metadata space reservation code. The problem is we used to free the reservation as soon as we allocated the delalloc region. The problem with this is if we are not inserting an inline extent, we don't actually insert the extent item until after the ordered extent is written out. This patch does 3 things, 1) It moves the reservation clearing stuff into the ordered code, so when we remove the ordered extent we remove the reservation. 2) It adds a EXTENT_DO_ACCOUNTING flag that gets passed when we clear delalloc bits in the cases where we want to clear the metadata reservation when we clear the delalloc extent, in the case that we do an inline extent or we invalidate the page. 3) It adds another waitqueue to the space info so that when we start a fs wide delalloc flush, anybody else who also hits that area will simply wait for the flush to finish and then try to make their allocation. This has been tested thoroughly to make sure we did not regress on performance. Signed-off-by: Josef Bacik <jbacik@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
1 parent a3429ab
Tip revision: 32c00aff718bb54a214b39146bdd9ac01511cd25 authored by Josef Bacik on 08 October 2009, 17:34:05 UTC
Btrfs: release delalloc reservations on extent item insertion
Btrfs: release delalloc reservations on extent item insertion
Tip revision: 32c00af
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| README | -rw-r--r-- | 17.0 KB |
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