From: Yanjun Zhu <yanjun.zhu@linux.dev>
To: Jason Gunthorpe <jgg@nvidia.com>, Zhu Yanjun <zyjzyj2000@gmail.com>
Cc: Bart Van Assche <bvanassche@acm.org>,
Bob Pearson <rpearsonhpe@gmail.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
Bernard Metzler <bmt@zurich.ibm.com>
Subject: Re: Apparent regression in blktests since 5.18-rc1+
Date: Mon, 9 May 2022 20:31:22 +0800 [thread overview]
Message-ID: <ff097539-3359-cf8a-14fd-7b0d460e8451@linux.dev> (raw)
In-Reply-To: <20220509115233.GI49344@nvidia.com>
在 2022/5/9 19:52, Jason Gunthorpe 写道:
> On Mon, May 09, 2022 at 04:01:19PM +0800, Zhu Yanjun wrote:
>> I delved into the above calltrace. It is the same with the problem in
>> the link https://www.spinics.net/lists/linux-rdma/msg109875.html
> Yes
>
>> So IMHO, the fix in this link
>> https://patchwork.kernel.org/project/linux-rdma/patch/20220422194416.983549-1-yanjun.zhu@linux.dev/
>> should fix this problem.
> I'm not going to apply a hacky patch like that, it needs proper fixing.
Can you explain "a hacky patch like that"? Thanks.
>
>> And if we want to use BH, it is very possible that the problem in the
>> link https://patchwork.kernel.org/project/linux-rdma/patch/20220210073655.42281-4-guoqing.jiang@linux.dev/
>> will occur.
>>
>> And to the RCU patch series in the link
>> https://patchwork.kernel.org/project/linux-rdma/patch/20220421014042.26985-2-rpearsonhpe@gmail.com/
>> I also delved into this patch series. And I found that an atomic
>> problem will occur if we apply RCU patches onto V5.18-rc5.
>> And because of the atomic problem, I can not verify that this RCU
>> patches can fix this problem currently.
> What is the oops?
The oops is like the following:
[ 36.700281] Call Trace:
[ 36.700285] <TASK>
[ 36.700291] dump_stack_lvl+0x70/0xa0
[ 36.700323] dump_stack+0x10/0x12
[ 36.700329] __might_resched.cold+0x102/0x13a
[ 36.700350] __might_sleep+0x43/0x70
[ 36.700368] wait_for_completion_timeout+0x40/0x160
[ 36.700373] ? _raw_spin_unlock_irqrestore+0x4f/0x80
[ 36.700381] ? complete+0x4c/0x60
[ 36.700403] __rxe_cleanup+0xaf/0xc0 [rdma_rxe]
[ 36.700431] rxe_destroy_ah+0x12/0x20 [rdma_rxe]
[ 36.700440] rdma_destroy_ah_user+0x3a/0x80 [ib_core]
[ 36.700464] cm_free_priv_msg+0x44/0xf0 [ib_cm]
[ 36.700477] cm_send_handler+0x10b/0x2f0 [ib_cm]
[ 36.700510] timeout_sends+0x1aa/0x230 [ib_core]
[ 36.700544] process_one_work+0x2a9/0x5e0
[ 36.700567] worker_thread+0x4d/0x3c0
[ 36.700582] ? process_one_work+0x5e0/0x5e0
[ 36.700588] kthread+0x10a/0x130
[ 36.700594] ? kthread_complete_and_exit+0x20/0x20
[ 36.700604] ret_from_fork+0x22/0x30
[ 36.700650] </TASK>
Zhu Yanjun
>
> Jason
next prev parent reply other threads:[~2022-05-09 12:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-06 18:11 Apparent regression in blktests since 5.18-rc1+ Bob Pearson
2022-05-07 0:10 ` Bart Van Assche
2022-05-07 0:29 ` Yanjun Zhu
2022-05-07 1:29 ` Jason Gunthorpe
2022-05-07 1:55 ` Yanjun Zhu
2022-05-07 13:43 ` Bob Pearson
2022-05-08 4:13 ` Bart Van Assche
2022-05-10 15:24 ` Pearson, Robert B
2022-05-12 21:57 ` Bob Pearson
2022-05-12 22:25 ` Bart Van Assche
2022-05-13 0:41 ` Bob Pearson
2022-05-13 3:40 ` Bart Van Assche
2022-05-17 15:21 ` Bob Pearson
2022-05-17 20:44 ` Bart Van Assche
2022-05-17 20:54 ` Bob Pearson
2022-05-17 20:59 ` Bob Pearson
2022-05-08 8:43 ` Yanjun Zhu
2022-05-09 8:01 ` Zhu Yanjun
2022-05-09 11:52 ` Jason Gunthorpe
2022-05-09 12:31 ` Yanjun Zhu [this message]
2022-05-09 12:33 ` Jason Gunthorpe
2022-05-09 12:42 ` Yanjun Zhu
2022-05-07 13:40 ` Bob Pearson
2022-05-09 6:56 ` Thorsten Leemhuis
2022-05-10 3:53 ` Bart Van Assche
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