linux-ext4 - Re: Ext4 deadlock (+lockdep splat) during rsync

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Message-ID: <20170110034050.do5q5d4feuqqhgj3@thunk.org>
Date:   Mon, 9 Jan 2017 22:40:50 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     George Spelvin <linux@...encehorizons.net>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: Ext4 deadlock (+lockdep splat) during rsync

On Sun, Jan 08, 2017 at 05:41:14PM -0500, George Spelvin wrote:
> After replacing a drive in a RAID array, I tried to bring some things
> up to date with rsync and ran into an annoyingly repeatable deadlock.

Thanks for the bug report!  I'm able to reproduce this, so it's a
matter of my tracking down the bug.

In the meantime, do you need a workaround?  If you're not using the
new project quota feature, I can send you a quick patch to disable
attempts to move the extended attributes to resereve space for the
project ID --- this is what is causing the deadlock.

	       	       	       	       - Ted
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