Messages in this thread | | | Subject | Re: md_raid: mdX_raid6 looping after sync_action "check" to "idle" transition | From | Yu Kuai <> | Date | Tue, 5 Sep 2023 11:50:10 +0800 |
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Hi,
在 2023/08/30 9:36, Yu Kuai 写道: > 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.
oops, I forgot that you need to backport this patch first to reporduce this problem:
https://lore.kernel.org/all/20230529132037.2124527-2-yukuai1@huaweicloud.com/
The patch fix the deadlock as well, but it introduce some regressions.
Thanks, Kuai
>> >> 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. >> > > . >
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