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From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-ext4@vger.kernel.org
Subject: Re: [PATCH] ext4: don't block for O_DIRECT if IOCB_NOWAIT is set
Date: Thu, 28 May 2020 23:15:00 -0400	[thread overview]
Message-ID: <20200529031500.GK228632@mit.edu> (raw)
In-Reply-To: <76152096-2bbb-7682-8fce-4cb498bcd909@kernel.dk>

On Sun, May 24, 2020 at 04:53:16PM -0600, Jens Axboe wrote:
> Running with some debug patches to detect illegal blocking triggered the
> extend/unaligned condition in ext4. If ext4 needs to extend the file (and
> hence go to buffered IO), or if the app is doing unaligned IO, then ext4
> asks the iomap code to wait for IO completion. If the caller asked for
> no-wait semantics by setting IOCB_NOWAIT, then ext4 should return -EAGAIN
> instead.
> 
> Signed-off-by: Jens Axboe <axboe@kernel.dk>

Thanks, applied.

					- Ted

      reply	other threads:[~2020-05-29  3:15 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-24 22:53 [PATCH] ext4: don't block for O_DIRECT if IOCB_NOWAIT is set Jens Axboe
2020-05-29  3:15 ` Theodore Y. Ts'o [this message]

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