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Date: Thu, 28 May 2020 23:15:00 -0400 From: "Theodore Y. Ts'o" <tytso@....edu> To: Jens Axboe <axboe@...nel.dk> Cc: linux-ext4@...r.kernel.org Subject: Re: [PATCH] ext4: don't block for O_DIRECT if IOCB_NOWAIT is set 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@...nel.dk> Thanks, applied. - Ted
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