From: Jens Axboe <axboe@kernel.dk>
To: Bart Van Assche <bvanassche@acm.org>
Cc: linux-scsi <linux-scsi@vger.kernel.org>,
James Bottomley <jbottomley@parallels.com>,
Mike Christie <michaelc@cs.wisc.edu>, Tejun Heo <tj@kernel.org>,
Chanho Min <chanho.min@lge.com>, Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH 0/13 v6] More device removal fixes
Date: Thu, 06 Dec 2012 14:33:57 +0100 [thread overview]
Message-ID: <50C09EC5.7010105@kernel.dk> (raw)
In-Reply-To: <50B60619.4080406@acm.org>
On 2012-11-28 13:39, Bart Van Assche wrote:
> Fix a few race conditions that can be triggered by removing a device:
> - Avoid that request_fn() can be invoked on a dead queue.
> - Avoid that blk_cleanup_queue() can finish while request_fn is still
> running.
> - Fix a race between starved list processing and device removal.
> - Avoid that a SCSI LLD callback can be invoked after scsi_remove_host()
> finished.
> - Speed up device removal by stopping error handling as soon as
> scsi_remove_host() started.
Bart, I've applied 1-6 to the block 3.8 tree. I still am not super happy
with 5/6, but I don't have any better ideas at the moment.
--
Jens Axboe
prev parent reply other threads:[~2012-12-06 13:34 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 12:39 [PATCH 0/13 v6] More device removal fixes Bart Van Assche
2012-11-28 12:42 ` [PATCH v6 01/13] block: Rename queue dead flag Bart Van Assche
2012-11-28 12:43 ` [PATCH v6 02/13] block: Let blk_drain_queue() caller obtain the queue lock Bart Van Assche
2012-11-28 12:44 ` [PATCH v6 03/13] block: Avoid that request_fn is invoked on a dead queue Bart Van Assche
2012-12-02 13:23 ` Tejun Heo
2012-12-02 13:35 ` Bart Van Assche
2012-11-28 12:45 ` [PATCH v6 04/13] block: Avoid scheduling delayed work " Bart Van Assche
2012-12-02 13:26 ` Tejun Heo
2012-12-02 13:41 ` Bart Van Assche
2012-12-02 13:59 ` Tejun Heo
2012-11-28 12:46 ` [PATCH v6 05/13] block: Make blk_cleanup_queue() wait until request_fn finished Bart Van Assche
2012-12-02 13:28 ` Tejun Heo
2012-11-28 12:47 ` [PATCH v6 06/13] bsg: Remove unused function bsg_goose_queue() Bart Van Assche
2012-12-02 13:29 ` Tejun Heo
2012-11-28 12:48 ` [PATCH v6 07/13] Fix race between starved list processing and device removal Bart Van Assche
2012-12-02 13:32 ` Tejun Heo
2012-11-28 12:48 ` [PATCH v6 08/13] Remove get_device() / put_device() pair from scsi_request_fn() Bart Van Assche
2012-12-02 13:34 ` Tejun Heo
2012-11-28 12:50 ` [PATCH v6 09/13] Avoid saving/restoring interrupt state inside scsi_remove_host() Bart Van Assche
2012-12-02 13:35 ` Tejun Heo
2012-11-28 12:51 ` [PATCH v6 10/13] Make scsi_remove_host() wait for device removal Bart Van Assche
2012-12-02 13:45 ` Tejun Heo
2012-12-02 13:48 ` Tejun Heo
2012-12-03 8:23 ` Bart Van Assche
2012-12-03 16:15 ` Tejun Heo
2012-12-03 16:38 ` Bart Van Assche
2012-12-03 16:42 ` Tejun Heo
2012-12-07 7:41 ` Bart Van Assche
2012-11-28 12:52 ` [PATCH v6 11/13] Make scsi_remove_host() wait until error handling finished Bart Van Assche
2012-12-02 13:51 ` Tejun Heo
2012-11-28 12:53 ` [PATCH v6 12/13] Avoid that scsi_device_set_state() triggers a race Bart Van Assche
2012-12-02 13:53 ` Tejun Heo
2012-11-28 12:53 ` [PATCH v6 13/13] Do not queue new I/O after scsi_remove_host() started Bart Van Assche
2012-12-02 13:58 ` Tejun Heo
2012-12-02 14:02 ` [PATCH 0/13 v6] More device removal fixes Tejun Heo
2012-12-06 13:33 ` Jens Axboe [this message]
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