From: Jane Chu <jane.chu@oracle.com>
To: "Luck, Tony" <tony.luck@intel.com>,
Borislav Petkov <bp@alien8.de>,
"djwong@kernel.org" <djwong@kernel.org>
Cc: "x86@kernel.org" <x86@kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Is it possible to corrupt disk when writeback page with undetected UE?
Date: Thu, 15 Sep 2022 22:36:30 +0000 [thread overview]
Message-ID: <44fe39d7-ac92-0abc-220b-5f5875faf3a9@oracle.com> (raw)
Hi,
Suppose there is a UE in a DRAM page that is backed by a disk file.
The UE hasn't been reported to the kernel, but low level firmware
initiated scrubbing has already logged the UE.
The page is then dirtied by a write, although the write clearly failed,
it didn't trigger an MCE.
And without a subsequent read from the page, at some point, the page is
written back to the disk, leaving a PAGE_SIZE of zeros in the targeted
disk blocks.
Is this mode of disk corruption possible?
Thanks a lot!
-jane
next reply other threads:[~2022-09-15 22:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-15 22:36 Jane Chu [this message]
2022-09-15 22:50 ` Is it possible to corrupt disk when writeback page with undetected UE? Luck, Tony
2022-09-16 0:26 ` Jane Chu
2022-09-16 0:30 ` Yang Shi
2022-09-16 0:51 ` Jane Chu
2022-09-16 16:17 ` Luck, Tony
2022-09-16 19:26 ` Jane Chu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=44fe39d7-ac92-0abc-220b-5f5875faf3a9@oracle.com \
--to=jane.chu@oracle.com \
--cc=bp@alien8.de \
--cc=djwong@kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=tony.luck@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.