From: Josef Bacik <jbacik@fusionio.com>
To: Miao Xie <miaox@cn.fujitsu.com>
Cc: <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH] Btrfs: don't clear the default compression type
Date: Fri, 22 Nov 2013 12:30:37 -0500 [thread overview]
Message-ID: <20131122173037.GD5349@localhost.localdomain> (raw)
In-Reply-To: <1385117279-32009-1-git-send-email-miaox@cn.fujitsu.com>
On Fri, Nov 22, 2013 at 06:47:59PM +0800, Miao Xie wrote:
> We met a oops caused by the wrong compression type:
> [ 556.512356] BUG: unable to handle kernel NULL pointer dereference at (null)
> [ 556.512370] IP: [<ffffffff811dbaa0>] __list_del_entry+0x1/0x98
> [SNIP]
> [ 556.512490] [<ffffffff811dbb44>] ? list_del+0xd/0x2b
> [ 556.512539] [<ffffffffa05dd5ce>] find_workspace+0x97/0x175 [btrfs]
> [ 556.512546] [<ffffffff813c14b5>] ? _raw_spin_lock+0xe/0x10
> [ 556.512576] [<ffffffffa05de276>] btrfs_compress_pages+0x2d/0xa2 [btrfs]
> [ 556.512601] [<ffffffffa05af060>] compress_file_range.constprop.54+0x1f2/0x4e8 [btrfs]
> [ 556.512627] [<ffffffffa05af388>] async_cow_start+0x32/0x4d [btrfs]
> [ 556.512655] [<ffffffffa05cc7a1>] worker_loop+0x144/0x4c3 [btrfs]
> [ 556.512661] [<ffffffff81059404>] ? finish_task_switch+0x80/0xb8
> [ 556.512689] [<ffffffffa05cc65d>] ? btrfs_queue_worker+0x244/0x244 [btrfs]
> [ 556.512695] [<ffffffff8104fa4e>] kthread+0x8d/0x95
> [ 556.512699] [<ffffffff81050000>] ? bit_waitqueue+0x34/0x7d
> [ 556.512704] [<ffffffff8104f9c1>] ? __kthread_parkme+0x65/0x65
> [ 556.512709] [<ffffffff813c7eec>] ret_from_fork+0x7c/0xb0
> [ 556.512713] [<ffffffff8104f9c1>] ? __kthread_parkme+0x65/0x65
>
> Steps to reproduce:
> # mkfs.btrfs -f <dev>
> # mount -o nodatacow <dev> <mnt>
> # touch <mnt>/<file>
> # chattr =c <mnt>/<file>
> # dd if=/dev/zero of=<mnt>/<file> bs=1M count=10
>
Please turn this into an xfstest. Thanks,
Josef
next prev parent reply other threads:[~2013-11-22 17:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-22 10:47 [PATCH] Btrfs: don't clear the default compression type Miao Xie
2013-11-22 17:30 ` Josef Bacik [this message]
2013-12-11 9:19 ` Liu Bo
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