From: Chris Mason <clm@fb.com>
To: Filipe David Borba Manana <fdmanana@gmail.com>,
<linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH] Btrfs: fix qgroups sanity test crash or hang
Date: Wed, 11 Jun 2014 20:35:05 -0400 [thread overview]
Message-ID: <5398F5B9.3000207@fb.com> (raw)
In-Reply-To: <1402531956-27668-1-git-send-email-fdmanana@gmail.com>
On 06/11/2014 08:12 PM, Filipe David Borba Manana wrote:
> Often when running the qgroups sanity test, a crash or a hang happened.
> This is because the extent buffer the test uses for the root node doesn't
> have an header level explicitly set, making it have a random level value.
> This is a problem when it's not zero for the btrfs_search_slot() calls
> the test ends up doing, resulting in crashes or hangs such as the following:
>
> Therefore initialize the extent buffer as an empty leaf (level 0).
>
> Issue easy to reproduce when btrfs is built as a module via:
>
> $ for ((i = 1; i <= 1000000; i++)); do rmmod btrfs; modprobe btrfs; done
Nice, thanks Filipe, I hadn't been able to trigger this yet.
-chris
next prev parent reply other threads:[~2014-06-12 0:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-12 0:12 [PATCH] Btrfs: fix qgroups sanity test crash or hang Filipe David Borba Manana
2014-06-12 0:35 ` Chris Mason [this message]
2014-06-12 15:43 ` Filipe David Manana
2014-06-12 1:47 ` [PATCH v2] " Filipe David Borba Manana
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