linux-kernel - blk-mq timeout handling fixes

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-next>] [day] [month] [year] [list]

Message-Id: <1410651613-1993-1-git-send-email-hch@lst.de>
Date:	Sat, 13 Sep 2014 16:40:07 -0700
From:	Christoph Hellwig <hch@....de>
To:	Jens Axboe <axboe@...com>
Cc:	Robert Elliott <elliott@...com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: blk-mq timeout handling fixes

This series fixes various issues with timeout handling that Robert
ran into when testing scsi-mq heavily.  He tested an earlier version,
and couldn't reproduce the issues anymore, although the series changed
quite significantly since and should probably be retested.

In summary we not only start the blk-mq timer inside the drivers
->queue_rq method after the request has been fully setup, and we
also tell the drivers if we're timing out a reserved (internal)
request or a real one.  Many drivers including will need to handle
those internal ones differently, e.g. for scsi-mq we don't even
have a scsi command structure allocated for the reserved commands.

--
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/