Re: [PATCH 0/2] sd: Fix a deadlock between event checking and device removal

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On 11/12/2016 09:47 PM, James Bottomley wrote:
On Fri, 2016-11-11 at 16:38 -0800, Bart Van Assche wrote:
Hello James and Martin,

This short patch series fixes a deadlock that I ran into for the
first time several months ago but for which I had not yet had the
time to post a fix. As usual, feedback is appreciated.

First question would be why do we need to push highly dm specific
knowledge into block, like REQ_FAIL_IF_NO_PATH.  Can't we just use
REQ_FAILFAST_X for this?

Also, I don't quite understand how you've configured multipath
underneath SCSI.  I thought dm-mp always went on top?

Hello James,

dm-multipath was running on top of SCSI in my setup which means that at least the patch description is wrong. Since it was some time ago that I ran into this deadlock, I will check first whether I can still reproduce it.

Bart.

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