xfs
[Top] [All Lists]

Re: Metadata CRC error upon unclean unmount

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: Metadata CRC error upon unclean unmount
From: Fanael Linithien <fanael4@xxxxxxxxx>
Date: Tue, 24 Jun 2014 18:19:04 +0200
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=v63/vMly9hby1Gqh4oHqL1vSgim4Kpiz9x9D2AC4ebw=; b=IhusCvi+1GGmtHScMB7J2gh1Yi6WJDPAHiIgVPW7Vru+ZrGGMByNCqyPonCokxfwvN omJRoUZJjrI74Cc2kmlJPPKS+BdFy8QDmzChWY6EKHL3P2ETknVr+fph/y8aXEV0I5ZE ktj4FesiJKzmD7GpeygHRoduvquGeuozjynjaEyiFXetV0YaqLUrNv/bPfwZyB7zaeZp +ZFMT46g5FJCZFs/NHcE+cDPkrLc9eUb7k0FJRq6ildl/ZRQz4bdfFSY55hvc7kRUwW7 PDYczwySnBOONG49hQQRDL38kvwJloZZxvSpt2KlQimjQZ/Nk9Rnhx2rAx/eiOBDlEOn n9sA==
In-reply-to: <53A9A295.8030302@xxxxxxxxxxx>
References: <CA+o=1OW0OXhzU+b9ACMZzg0dq=B7BSj+yPXD2Vrr9F6mWK8ruQ@xxxxxxxxxxxxxx> <53A9A295.8030302@xxxxxxxxxxx>
2014-06-24 18:08 GMT+02:00 Eric Sandeen <sandeen@xxxxxxxxxxx>:
> Do you have any kind of reproducer for this?

The closest thing to a reliable reproducer I found is:
dd if=/dev/urandom of=some.file
<VM reset while dd is still running>

> Any chance you created an xfs_metadump before the xfs_repair?

I still have the broken FS, but the dump is 225 MB. Will it be OK if I
repro it on a clean FS?

> What constitutes an "unclean unmount" in your case; a VM reset?  A host
> crash?

A VM reset.

> (This is a VM, right?)

Right.

> What sort of block device configuration does it have?

What do you mean?

<Prev in Thread] Current Thread [Next in Thread>