lkml.org 
[lkml]   [2018]   [Apr]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 4.4 52/97] mtip32xx: use runtime tag to initialize command header
From
Date
On Fri, 2018-03-23 at 10:54 +0100, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
>
> ------------------
>
> From: Ming Lei <ming.lei@redhat.com>
>
>
> [ Upstream commit a4e84aae8139aca9fbfbced1f45c51ca81b57488 ]
>
> mtip32xx supposes that 'request_idx' passed to .init_request()
> is tag of the request, and use that as request's tag to initialize
> command header.
>
> After MQ IO scheduler is in, request tag assigned isn't same with
> the request index anymore, so cause strange hardware failure on
> mtip32xx, even whole system panic is triggered.
[...]

MQ IO schedulers were introduced in 4.11, so this shouldn't be needed
in older branches. It also causes a performance regression (fixed
upstream). Please revert this for 4.4 and 4.9.

Ben.

--
Ben Hutchings
Software Developer, Codethink Ltd.

\
 
 \ /
  Last update: 2018-04-03 23:01    [W:0.442 / U:8.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site