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From: Qu Wenruo <quwenruo.btrfs@gmx.com>
To: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Regression that causes data csum mismatch
Date: Tue, 13 Jun 2023 14:26:39 +0800	[thread overview]
Message-ID: <da414ecc-f329-48ec-94d2-67c94755effb@gmx.com> (raw)

Hi,

Recently I am testing scrub preparing for the incoming logical scrub.

But I noticed some rare and random test cases failure from scrub and
replace groups.

E.g. btrfs/072 has a chance of failure around 1/30.

Initially I thought it's my scrub patches screwing things up, but with
more digging, it turns out that it's real data corruption.


After scrubbing found errors, btrfs check --check-data-csum also reports
csum mismatch.

Furthermore this is profile independent, I have see all profiles hitting
such data corruption.

Currently trying to bisect, but 6.4-rc4 already shows the bug.

And I can reproduce the problem on both x86_64 and aarch64 (both 4K page
size)

Thanks,
Qu

             reply	other threads:[~2023-06-13  6:26 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-13  6:26 Qu Wenruo [this message]
2023-06-13  6:27 ` Regression that causes data csum mismatch Qu Wenruo
2023-06-13 13:21 ` Linux regression tracking #adding (Thorsten Leemhuis)
2023-06-13 16:02 ` David Sterba
2023-06-13 22:17   ` Qu Wenruo
2023-06-15 15:32     ` David Sterba
2023-06-15 18:00       ` Linux regression tracking (Thorsten Leemhuis)

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