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ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback
The multiblock allocator needs to be able to release blocks (and issue a blkdev discard request) when the transaction which freed those blocks is committed. Previously this was done via a polling mechanism when blocks are allocated or freed. A much better way of doing things is to create a jbd2 callback function and attaching the list of blocks to be freed directly to the transaction structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Theodore Ts'o
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Oct 17, 2008
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