linux-kernel - Re: [patch]blk-mq: blk_mq_tag_to

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]

Message-ID: <20140604111133.GA7826@infradead.org>
Date:	Wed, 4 Jun 2014 04:11:33 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Shaohua Li <shli@...nel.org>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch]blk-mq: blk_mq_tag_to_rq should handle flush request

On Fri, May 30, 2014 at 08:09:51AM -0600, Jens Axboe wrote:
> I have applied this one, but it irks me a little bit since we have
> to touch q->flush_rq->stuff from a potential hot path. I haven't
> thought much about this yet, but it would be a lot better if we
> could fold in the flush tag somehow.

This one also breaks scsi-mq by changing the first parameter of
blk_mq_tag_to_rq.  With host-wide tags we won't have a hardware context
easily available when looking for a request by tag.

--
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/