linux-kernel - Re: BTRFS/EXT4 Data Corruption

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Message-ID: <20200702211629.GA5787@amd>
Date:   Thu, 2 Jul 2020 23:16:29 +0200
From:   Pavel Machek <pavel@....cz>
To:     Sebastian Hyrwall <sh@...f.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: BTRFS/EXT4 Data Corruption

Hi!

> After alot of fiddling around it turned out that the problem goes away if
> doing "cp --sparse=never"
> when copying the files. This would to me exclude any hardware errors and
> feels more like something
> deeper inside the kernel.

If files contain random data, they are never sparse. It is strange
that sparse=never would make any difference.

> The box runs Kernel 3.10.105. Version >4 seems unaffected (not 100%
> confirmed, too few testboxes).

I'm afraid relevant developers will not be willing to debug 3.10
kernel.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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