From: Sarah Newman <srn@prgmr.com>
To: Chris Murphy <lists@colorremedies.com>,
Michal Soltys <msoltyspl@yandex.pl>
Cc: John Stoffel <john@stoffel.org>,
Roger Heflin <rogerheflin@gmail.com>,
Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: [general question] rare silent data corruption when writing data
Date: Sun, 10 May 2020 12:05:00 -0700 [thread overview]
Message-ID: <cd93b47a-7d77-5491-9632-0cea1f34bbe4@prgmr.com> (raw)
In-Reply-To: <CAJCQCtRWvsKwwoZejERq=_OLXEa3JQd5RJ65tCz=X=Sp1xtRMQ@mail.gmail.com>
On 5/7/20 8:44 PM, Chris Murphy wrote:
>
> I would change very little until you track this down, if the goal is
> to track it down and get it fixed.
>
> I'm not sure if LVM thinp is supported with LVM raid still, which if
> it's not supported yet then I can understand using mdadm raid5 instead
> of LVM raid5.
My apologies if this ideas was considered and discarded already, but the bug being hard to reproduce right after reboot and the error being exactly
the size of a page sounds like a memory use after free bug or similar.
A debug kernel build with one or more of these options may find the problem:
CONFIG_DEBUG_PAGEALLOC
CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT
CONFIG_PAGE_POISONING + page_poison=1
CONFIG_KASAN
--Sarah
next prev parent reply other threads:[~2020-05-10 19:05 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 17:30 [general question] rare silent data corruption when writing data Michal Soltys
2020-05-07 18:24 ` Roger Heflin
2020-05-07 21:01 ` John Stoffel
2020-05-07 22:33 ` Michal Soltys
2020-05-08 0:54 ` John Stoffel
2020-05-08 11:10 ` Michal Soltys
2020-05-08 11:10 ` [linux-lvm] " Michal Soltys
2020-05-08 16:10 ` John Stoffel
2020-05-08 16:10 ` [linux-lvm] " John Stoffel
2020-05-08 3:44 ` Chris Murphy
2020-05-10 19:05 ` Sarah Newman [this message]
2020-05-10 19:12 ` Sarah Newman
2020-05-11 9:41 ` Michal Soltys
2020-05-11 19:42 ` Sarah Newman
2020-05-20 21:40 ` Michal Soltys
2020-05-07 22:13 ` Michal Soltys
2020-05-13 6:31 ` Chris Dunlop
2020-05-13 17:49 ` John Stoffel
2020-05-14 0:39 ` Chris Dunlop
2020-05-20 20:29 ` Michal Soltys
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