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From: Jens Axboe <[email protected]>
To: Stefano Garzarella <[email protected]>
Cc: Alexander Viro <[email protected]>,
	[email protected], [email protected],
	[email protected]
Subject: Re: [PATCH] io_uring: wakeup threads waiting for EPOLLOUT events
Date: Thu, 16 Jan 2020 08:29:07 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 1/16/20 6:49 AM, Stefano Garzarella wrote:
> io_uring_poll() sets EPOLLOUT flag if there is space in the
> SQ ring, then we should wakeup threads waiting for EPOLLOUT
> events when we expose the new SQ head to the userspace.
> 
> Signed-off-by: Stefano Garzarella <[email protected]>
> ---
> 
> Do you think is better to change the name of 'cq_wait' and 'cq_fasync'?

I honestly think it'd be better to have separate waits for in/out poll,
the below patch will introduce some unfortunate cacheline traffic
between the submitter and completer side.

-- 
Jens Axboe


  reply	other threads:[~2020-01-16 15:29 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16 13:49 [PATCH] io_uring: wakeup threads waiting for EPOLLOUT events Stefano Garzarella
2020-01-16 15:29 ` Jens Axboe [this message]
2020-01-16 15:55   ` Stefano Garzarella
2020-01-16 16:00     ` Jens Axboe
2020-01-16 16:26       ` Stefano Garzarella
2020-01-16 16:30         ` Jens Axboe
2020-01-16 17:03           ` Stefano Garzarella
2020-01-23 19:13             ` Jens Axboe
2020-01-23 21:45               ` Stefano Garzarella
2020-01-24  1:28                 ` Jens Axboe

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