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From: Jan Kara <jack@suse.cz>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: Naoto Kobayashi <naoto.kobayashi4c@gmail.com>,
	adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org
Subject: Re: [PATCH v2 2/3] ext4: Rename ext4_kvmalloc() to ext4_kvmalloc_nofs() and drop its flags argument
Date: Thu, 16 Jan 2020 13:37:24 +0100
Message-ID: <20200116123724.GD8446@quack2.suse.cz> (raw)
In-Reply-To: <20200113223237.GL76141@mit.edu>

On Mon 13-01-20 17:32:37, Theodore Y. Ts'o wrote:
> On Fri, Dec 27, 2019 at 05:05:22PM +0900, Naoto Kobayashi wrote:
> > Rename ext4_kvmalloc() to ext4_kvmalloc_nofs() and drop
> > its flags argument, because ext4_kvmalloc() callers must be
> > under GFP_NOFS (otherwise, they should use generic kvmalloc()
> > helper function).
> > 
> > Signed-off-by: Naoto Kobayashi <naoto.kobayashi4c@gmail.com>
> 
> Thanks, applied.

Ted, I don't think this patch is needed at all - see my email [1]. Sadly
Naoto didn't reply to my question whether he really saw any deadlock /
lockdep splat or whether it was just a theoretical concern he had...

								Honza

[1] https://lore.kernel.org/linux-ext4/20200109100007.GC27035@quack2.suse.cz

-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR

  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-27  8:05 [PATCH v2 0/3] ext4: Prevent memory reclaim from re-entering the filesystem and deadlocking Naoto Kobayashi
2019-12-27  8:05 ` [PATCH v2 1/3] ext4: Delete ext4_kvzvalloc() Naoto Kobayashi
2020-01-09  9:51   ` Jan Kara
2020-01-13 22:32   ` Theodore Y. Ts'o
2019-12-27  8:05 ` [PATCH v2 2/3] ext4: Rename ext4_kvmalloc() to ext4_kvmalloc_nofs() and drop its flags argument Naoto Kobayashi
2020-01-09 10:00   ` Jan Kara
2020-01-13 22:32   ` Theodore Y. Ts'o
2020-01-16 12:37     ` Jan Kara [this message]
2020-01-16 15:12       ` Theodore Y. Ts'o
2020-01-16 15:50         ` [PATCH] ext4: drop ext4_kvmalloc() Theodore Ts'o
2020-01-17 10:30           ` Jan Kara
2020-01-17 16:36             ` Theodore Y. Ts'o
2019-12-27  8:05 ` [PATCH v2 3/3] ext4: Prevent ext4_kvmalloc_nofs() from re-entering the filesystem and deadlocking Naoto Kobayashi

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