From: liubo <liubo2009@cn.fujitsu.com>
To: "Yan, Zheng " <yanzheng@21cn.com>
Cc: Linux Btrfs <linux-btrfs@vger.kernel.org>,
Josef Bacik <josef@redhat.com>,
Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Subject: Re: [RFC PATCH 2/4 v2] Btrfs: avoid transaction stuff when readonly
Date: Thu, 02 Dec 2010 13:38:50 +0800 [thread overview]
Message-ID: <4CF730EA.9040507@cn.fujitsu.com> (raw)
In-Reply-To: <AANLkTi=2j4MEJ0s3Ot6+gFP=g3TWVdEsFmhwPKvpTRo-@mail.gmail.com>
On 12/02/2010 12:28 PM, Yan, Zheng wrote:
> On Thu, Dec 2, 2010 at 11:42 AM, liubo <liubo2009@cn.fujitsu.com> wrote:
>> On 12/01/2010 06:20 PM, liubo wrote:
>>> When the filesystem is readonly, avoid transaction stuff by checking MS_RDONLY at
>>> start transaction time.
>>>
>> This patch may lead btrfs panic.
>>
>> Since btrfs allows transaction under readonly fs state, which is a bit weird, btrfs
>> does not even check the returned transaction from start_transaction, although it may
>> return -ENOMEM.
>
> btrfs may do log replay even mount as readonly.
Yeah, it it right.
log replay maybe does take place when btrfs is mounted as readonly, but after the FS is
broken, is btrfs willing to do log replay in such case?
thanks,
Liu Bo
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next prev parent reply other threads:[~2010-12-02 5:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-01 10:20 [RFC PATCH 2/4 v2] Btrfs: avoid transaction stuff when readonly liubo
2010-12-02 3:42 ` liubo
2010-12-02 4:28 ` Yan, Zheng
2010-12-02 5:38 ` liubo [this message]
2010-12-02 5:41 ` Mike Fedyk
2010-12-02 6:36 ` liubo
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