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From: Yu Kuai <yukuai1@huaweicloud.com>
To: Dragan Stancevic <dragan@stancevic.com>,
	Yu Kuai <yukuai1@huaweicloud.com>,
	song@kernel.org
Cc: buczek@molgen.mpg.de, guoqing.jiang@linux.dev,
	it+raid@molgen.mpg.de, linux-kernel@vger.kernel.org,
	linux-raid@vger.kernel.org, msmith626@gmail.com,
	"yangerkun@huawei.com" <yangerkun@huawei.com>,
	"yukuai (C)" <yukuai3@huawei.com>
Subject: Re: md_raid: mdX_raid6 looping after sync_action "check" to "idle" transition
Date: Wed, 30 Aug 2023 09:36:53 +0800	[thread overview]
Message-ID: <0d79d1f9-00e8-93be-3c7c-244030521cd7@huaweicloud.com> (raw)
In-Reply-To: <cf765117-7270-1b98-7e82-82a1ca1daa2a@stancevic.com>

Hi,

在 2023/08/29 4:32, Dragan Stancevic 写道:

> Just a followup on 6.1 testing. I tried reproducing this problem for 5 
> days with 6.1.42 kernel without your patches and I was not able to 
> reproduce it.
> 
> It seems that 6.1 has some other code that prevents this from happening.
> 

I see that there are lots of patches for raid456 between 5.10 and 6.1,
however, I remember that I used to reporduce the deadlock after 6.1, and
it's true it's not easy to reporduce, see below:

https://lore.kernel.org/linux-raid/e9067438-d713-f5f3-0d3d-9e6b0e9efa0e@huaweicloud.com/

My guess is that 6.1 is harder to reporduce than 5.10 due to some
changes inside raid456.

By the way, raid10 had a similiar deadlock, and can be fixed the same
way, so it make sense to backport these patches.

https://lore.kernel.org/r/20230529132037.2124527-5-yukuai1@huaweicloud.com

Thanks,
Kuai


> On 5.10 I can reproduce it within minutes to an hour.
> 


  reply	other threads:[~2023-08-30  1:37 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-28 12:25 md_raid: mdX_raid6 looping after sync_action "check" to "idle" transition Donald Buczek
2020-11-30  2:06 ` Guoqing Jiang
2020-12-01  9:29   ` Donald Buczek
2020-12-02 17:28     ` Donald Buczek
2020-12-03  1:55       ` Guoqing Jiang
2020-12-03 11:42         ` Donald Buczek
2020-12-21 12:33           ` Donald Buczek
2021-01-19 11:30             ` Donald Buczek
2021-01-20 16:33               ` Guoqing Jiang
2021-01-23 13:04                 ` Donald Buczek
2021-01-25  8:54                   ` Donald Buczek
2021-01-25 21:32                     ` Donald Buczek
2021-01-26  0:44                       ` Guoqing Jiang
2021-01-26  9:50                         ` Donald Buczek
2021-01-26 11:14                           ` Guoqing Jiang
2021-01-26 12:58                             ` Donald Buczek
2021-01-26 14:06                               ` Guoqing Jiang
2021-01-26 16:05                                 ` Donald Buczek
2021-02-02 15:42                                   ` Guoqing Jiang
2021-02-08 11:38                                     ` Donald Buczek
2021-02-08 14:53                                       ` Guoqing Jiang
2021-02-08 18:41                                         ` Donald Buczek
2021-02-09  0:46                                           ` Guoqing Jiang
2021-02-09  9:24                                             ` Donald Buczek
2023-03-14 13:25                                             ` Marc Smith
2023-03-14 13:55                                               ` Guoqing Jiang
2023-03-14 14:45                                                 ` Marc Smith
2023-03-16 15:25                                                   ` Marc Smith
2023-03-29  0:01                                                     ` Song Liu
2023-08-22 21:16                                                       ` Dragan Stancevic
2023-08-23  1:22                                                         ` Yu Kuai
2023-08-23 15:33                                                           ` Dragan Stancevic
2023-08-24  1:18                                                             ` Yu Kuai
2023-08-28 20:32                                                               ` Dragan Stancevic
2023-08-30  1:36                                                                 ` Yu Kuai [this message]
2023-09-05  3:50                                                                   ` Yu Kuai
2023-09-05 13:54                                                                     ` Dragan Stancevic
2023-09-13  9:08                                                                       ` Donald Buczek
2023-09-13 14:16                                                                         ` Dragan Stancevic
2023-09-14  6:03                                                                           ` Donald Buczek
2023-09-17  8:55                                                                             ` Donald Buczek
2023-09-24 14:35                                                                               ` Donald Buczek
2023-09-25  1:11                                                                                 ` Yu Kuai
2023-09-25  9:11                                                                                   ` Donald Buczek
2023-09-25  9:32                                                                                     ` Yu Kuai
2023-03-15  3:02                                                 ` Yu Kuai
2023-03-15  9:30                                                   ` Guoqing Jiang
2023-03-15  9:53                                                     ` Yu Kuai
2023-03-15  7:52                                               ` Donald Buczek

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