linux-kernel - Re: [PATCH 0/2] swim3: use blk_end_request

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 13 May 2009 00:51:22 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	tj@...nel.org
Cc:	fujita.tomonori@....ntt.co.jp, jens.axboe@...cle.com,
	linux-kernel@...r.kernel.org, benh@...nel.crashing.org
Subject: Re: [PATCH 0/2] swim3: use blk_end_request_all()

On Wed, 13 May 2009 00:36:41 +0900
Tejun Heo <tj@...nel.org> wrote:

> FUJITA Tomonori wrote:
> > On Wed, 13 May 2009 00:25:51 +0900
> > Tejun Heo <tj@...nel.org> wrote:
> > 
> >> Hello,
> >>
> >> FUJITA Tomonori wrote:
> >>> This is against for-2.6.31 branch in the block tree.
> >>>
> >>> Tejun, don't we need to use blk_end_request_all() when we hit the
> >>> maximum retry count in swim3_interrupt? Looks like we can't handle a
> >>> request properly if we doesn't complete the request there.
> >> Ummm.... why so?  Can you elaborate the bug scenario a bit?  I was
> >> trying to keep the original behavior whereever possible.
> > 
> > If when a request hits the maximum retry count and
> > swim3_end_request_cur() doesn't complete the request there, where the
> > request will be freed?
> 
> It won't be freed.  The current segment will be failed and the next
> segment of the request will be tried on the next iteration, which was
> the original behavior.  ie. it always fails requests
> segment-by-segment and hitting max retry count doesn't fail the whole
> request.

Ah, I see. Thanks, then the current code is fine.

Well, it might be better to update some of the description of
blk_update_request, e.g., "the special helper function is only for
request stacking drivers".
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/