Re: [PATCH, RFC] ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback

Aneesh Kumar K.V
2008-10-17T06:04:41Z

On Thu, Oct 16, 2008 at 08:02:43PM -0400, Theodore Ts'o wrote:
> 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.

Why not use journal commit callback patch from andreas
(MID:20080929201752.GN10950@webber.adilger.int
http://article.gmane.org/gmane.comp.file-systems.ext4/9148)

The patch you sent will allows only one call back to be registered.

-aneesh