linux-kernel - Re: [linus:master] [RDMA/iwcm] aee2424246: WARNING:at_kernel/workqueue.c:#check_flush

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Message-ID: <ZsP0ae1Y5ztsqFj1@xsang-OptiPlex-9020>
Date: Tue, 20 Aug 2024 09:42:01 +0800
From: Oliver Sang <oliver.sang@...el.com>
To: Zhu Yanjun <yanjun.zhu@...ux.dev>
CC: Bart Van Assche <bvanassche@....org>, <oe-lkp@...ts.linux.dev>,
	<lkp@...el.com>, <linux-kernel@...r.kernel.org>, Leon Romanovsky
	<leon@...nel.org>, Shin'ichiro Kawasaki <shinichiro.kawasaki@....com>,
	<linux-rdma@...r.kernel.org>, <oliver.sang@...el.com>
Subject: Re: [linus:master] [RDMA/iwcm] aee2424246:
 WARNING:at_kernel/workqueue.c:#check_flush_dependency

hi, Zhu Yanjun,

On Sun, Aug 18, 2024 at 02:24:52PM +0800, Oliver Sang wrote:
> hi, Yanjun.Zhu,
> 
> On Sat, Aug 17, 2024 at 04:46:23PM +0800, Zhu Yanjun wrote:
> > 
> > 在 2024/8/17 1:10, Bart Van Assche 写道:
> > > On 8/16/24 5:49 AM, Zhu Yanjun wrote:
> > > > Hi, kernel test robot
> > > > 
> > > > Please help to make tests with the following commits.
> > > > 
> > > > Please let us know the result.
> > > I don't think that the kernel test robot understands the above request.
> > 
> > Got it. I do not know how to let test robot make tests with this patch.^_^
> 
> we can test the patch for you. just cannot test quickly due to resource
> constraint. will let you know the results in one or two days. thanks

the WARNING is random in our tests. for aee2424246, it shows up 6 times in 20
runs as below table.

the "e0cc1e2cd74a66b5252ea674a26" is just your fix patch.

we run it to 100 times, and the issue doesn't show.

Tested-by: kernel test robot <oliver.sang@...el.com>

a1babdb5b615751e aee2424246f9f1dadc33faa7899 e0cc1e2cd74a66b5252ea674a26
---------------- --------------------------- ---------------------------
       fail:runs  %reproduction    fail:runs  %reproduction    fail:runs
           |             |             |             |             |
           :20          30%           6:20           0%            :100   dmesg.RIP:check_flush_dependency
           :20          30%           6:20           0%            :100   dmesg.WARNING:at_kernel/workqueue.c:#check_flush_dependency


> 
> > 
> > Follow your advice, I have sent out a patch to rdma maillist. Please review.
> > 
> > Best Regards,
> > 
> > Zhu Yanjun
> > 
> > > 
> > > Thanks,
> > > 
> > > Bart.
> > 
> > -- 
> > Best Regards,
> > Yanjun.Zhu
> >