From: Nikolay Borisov <kernel@kyup.com>
To: Theodore Ts'o <tytso@mit.edu>,
adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] ext4: make use of sb_getblk_gfp
Date: Thu, 02 Jul 2015 09:16:34 +0300 [thread overview]
Message-ID: <5594D742.6040202@kyup.com> (raw)
In-Reply-To: <20150702061427.GB3108@thunk.org>
On 07/02/2015 09:14 AM, Theodore Ts'o wrote:
> On Tue, Jun 30, 2015 at 09:26:49AM +0300, Nikolay Borisov wrote:
>> Switch ext4 to using sb_getblk_gfp with GFP_NOFS added, this fixes
>> possible deadlocks in the page writeback path.
>>
>> Signed-off-by: Nikolay Borisov <kernel@kyup.com>
>
> I've added this to the ext4.git tree, thanks.
>
> - Ted
Thanks!
Just a question that popped to my mind after discussing with a colleague
- Is GFP_NOFS enough here or should it be GFP_NOIO? Presumably the
latter is a stronger guarantee that we are not going to hit any
fs/writeback related code?
Nikolay
next prev parent reply other threads:[~2015-07-02 6:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-30 6:26 [PATCH 1/2] bufferhead: Add _gfp version for sb_getblk() Nikolay Borisov
2015-06-30 6:26 ` [PATCH 2/2] ext4: make use of sb_getblk_gfp Nikolay Borisov
2015-07-02 6:14 ` Theodore Ts'o
2015-07-02 6:16 ` Nikolay Borisov [this message]
2015-07-02 14:17 ` Theodore Ts'o
2015-07-02 6:14 ` [PATCH 1/2] bufferhead: Add _gfp version for sb_getblk() Theodore Ts'o
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