Re: [PATCH 0/6] add large command support to the block layer

[Jens Axboe <jens.axboe@oracle.com>]

On Sat, Apr 26 2008, FUJITA Tomonori wrote:
> This is an updated patchset for large command support to the block
> layer:
> 
> http://marc.info/?l=linux-scsi&m=120817127118449&w=2
> 
> We rarely handle large commands. So for optimization, a struct request
> still has a static array for a command. rq_init sets rq->cmd pointer
> to the static array. In short, rq_init() does
> 
> rq->cmd = rq->__cmd;
> 
> So we can access to rq->cmd and rq->cmd_len as before.
> 
> This change requires everyone to initialize the request in a proper
> way (that is, just doing a memset() will not work). Now we have
> rq_init() that works for any path so this patchset can cleanly convert
> users of requests on the stack or kmalloced requests to use it (the
> previous patchset does it in a hacky way):
> 
> http://marc.info/?l=linux-scsi&m=120911792725876&w=2
> 
> This patchset is against Jens' for-linus branch.
> 
> #1-#4 patches can be applied via Jens' tree now. #5 patch is for
> IDE. It cleanly can be applied to both Bart's latest quilt tree and
> Jens' tree though Bart's quilt tree has some pending IDE patches. #4
> patch depends on #4. #6 patch depends on #1-#5.
> 
> I guess that the easiest way to apply this patchset would be:
> 
> 1. Pushing Bart's quilt tree to mainline.
> 2. Rebasing Jens' tree to mainline.
> 3. Pushing this patchset via Jens' tree.
> 
> Jens and Bart, let me know if I can do something to make the process
> easier.
> 
> Bart, I will try to push the patchset to remove the requests on the
> stack for 2.6.27:
> 
> http://marc.info/?l=linux-ide&m=120882410712466&w=2

I've applied all patches to the for-linus branch, it should go up
soonish. If anyone has problems with this, please holler SOON.

-- 
Jens Axboe