os/bluestore: fix inappropriate ENOSPC from avl/hybrid allocator#38438
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tchaikov merged 1 commit intoceph:masterfrom Dec 5, 2020
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os/bluestore: fix inappropriate ENOSPC from avl/hybrid allocator#38438tchaikov merged 1 commit intoceph:masterfrom
tchaikov merged 1 commit intoceph:masterfrom
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tchaikov
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Dec 4, 2020
Under high fragmentation circumstances (in best-fit mode) these allocators might fail to return continuous(longer than a single alloc unit) extents. Occurs when requested size is longer than the maximum available extents and these extents are unaligned with alloc unit. The latter results in the actual lengths of these extens are shorter than the requested length and they do not match to the lookup. Which finally causes no allocation at all. Fixes: https://tracker.ceph.com/issues/47883 Signed-off-by: Igor Fedotov <ifedotov@suse.com>
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Under high fragmentation circumstances (in best-fit mode) these allocators might fail to
return continuous(longer than a single alloc unit) extents. Occurs when
requested size is longer than the maximum available extents and these
extents are unaligned with alloc unit. The latter results in the actual lengths of these extens are shorter
than the requested length and they do not match to the lookup. Which
finally causes no allocation at all.
Fixes: https://tracker.ceph.com/issues/47883
Signed-off-by: Igor Fedotov ifedotov@suse.com
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