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author | 2023-10-16 10:41:55 -0700 | |
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committer | 2023-10-19 08:34:33 -0700 | |
commit | e23aaf450de733044a74bc95528f728478b61c2a (patch) | |
tree | 914e368b9df0c28a963aa475190bfd3870147e73 /fs/xfs/xfs_extfree_item.h | |
parent | xfs: simplify rt bitmap/summary block accessor functions (diff) | |
download | linux-e23aaf450de733044a74bc95528f728478b61c2a.tar.gz linux-e23aaf450de733044a74bc95528f728478b61c2a.tar.bz2 linux-e23aaf450de733044a74bc95528f728478b61c2a.zip |
xfs: invert the realtime summary cache
In commit 355e3532132b ("xfs: cache minimum realtime summary level"), I
added a cache of the minimum level of the realtime summary that has any
free extents. However, it turns out that the _maximum_ level is more
useful for upcoming optimizations, and basically equivalent for the
existing usage. So, let's change the meaning of the cache to be the
maximum level + 1, or 0 if there are no free extents.
For example, if the cache contains:
{0, 4}
then there are no free extents starting in realtime bitmap block 0, and
there are no free extents larger than or equal to 2^4 blocks starting in
realtime bitmap block 1. The cache is a loose upper bound, so there may
or may not be free extents smaller than 2^4 blocks in realtime bitmap
block 1.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_extfree_item.h')
0 files changed, 0 insertions, 0 deletions