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authorChris Mason <chris.mason@oracle.com>2009-09-18 16:07:03 -0400
committerChris Mason <chris.mason@oracle.com>2009-09-18 16:08:52 -0400
commitb917b7c3be50435fa8257591b964934e917f2d45 (patch)
treeefdc2f768da474a4904dc6c065cc6e4b9a2379d3 /init
parentf85d7d6c8f2ad4a86a1f4f4e3791f36dede2fa76 (diff)
Btrfs: search for an allocation hint while filling file COW
The allocator has some nice knobs for sending hints about where to try and allocate new blocks, but when we're doing file allocations we're not sending any hint at all. This commit adds a simple extent map search to see if we can quickly and easily find a hint for the allocator. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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