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

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Message-ID: <20170119231931.bxnltnlwinjdzvxa@thunk.org>
Date:   Thu, 19 Jan 2017 18:19:31 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     Jan Kara <jack@...e.cz>
Cc:     George Spelvin <linux@...encehorizons.net>,
        linux-ext4@...r.kernel.org
Subject: Re: Ext4 deadlock (+lockdep splat) during rsync

On Thu, Jan 19, 2017 at 06:37:07PM +0100, Jan Kara wrote:
> OK, the problem is that we call ext4_mark_inode_dirty() while holding
> xattr_sem and that recurses into ext4_expand_extra_isize_ea() which tries
> to grab it again. This may happen in several place in inline.c, generally
> when handling inline directories. I'll try to craft a fix tomorrow...

I think the inline_data patches I posted should have taken care of
George's initial set of bug reports?

(And George, the reason why you're seeing lots of problems is because
inline_data isn't enabled by default yet, and as the old joke goes,
the Early Christians get the best Lions.  :-)

						- Ted
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