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From: Jens Axboe <[email protected]>
To: [email protected], [email protected]
Cc: [email protected]
Subject: [PATCHSET for-next 0/2] Make pipe honor IOCB_NOWAIT
Date: Tue,  7 Mar 2023 08:45:31 -0700	[thread overview]
Message-ID: <[email protected]> (raw)

Hi,

File types that implement read_iter/write_iter should check for
IOCB_NOWAIT in conjunction with O_NONBLOCK, so it can correctly bail
with -EAGAIN if we need to block for space/data. pipe doesn't currently
do that, and that's the primary reason for why io_uring needs to use
a slower path for it.

Add the appropriate check, and expand the io_uring "understands nonblock"
check so that we catch it.

-- 
Jens Axboe



             reply	other threads:[~2023-03-07 15:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-07 15:45 Jens Axboe [this message]
2023-03-07 15:45 ` [PATCH 1/2] pipe: honor iocb IOCB_NOWAIT flag as well Jens Axboe
2023-03-07 15:45 ` [PATCH 2/2] io_uring: assume read_iter/write_iter are safe for nonblocking Jens Axboe
2023-03-08  0:19 ` [PATCHSET for-next 0/2] Make pipe honor IOCB_NOWAIT Dave Chinner
2023-03-08  0:31   ` Jens Axboe

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