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From: Stefan Hajnoczi <[email protected]>
To: Ming Lei <[email protected]>
Cc: Jens Axboe <[email protected]>, [email protected]
Subject: Re: Resizing io_uring SQ/CQ?
Date: Fri, 10 Mar 2023 11:56:28 -0500	[thread overview]
Message-ID: <20230310165628.GA491749@fedora> (raw)
In-Reply-To: <[email protected]>

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On Fri, Mar 10, 2023 at 11:14:04PM +0800, Ming Lei wrote:

Hi Ming,
Another question about this:

Does the io worker thread pool have limits so that eventually work
queues up and new work is not able to execute until in-flight work
completes?

In that case, even if io_uring_enter(2) accepts requests without
returning EBUSY/EAGAIN, it seems like there is still a deadlock scenario
when work that is executing depends on later work that is unable to
execute.

Stefan

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  parent reply	other threads:[~2023-03-10 16:59 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-09 13:48 Resizing io_uring SQ/CQ? Stefan Hajnoczi
2023-03-10  1:38 ` Ming Lei
2023-03-10  2:58   ` Jens Axboe
2023-03-10  3:42     ` Vito Caputo
2023-03-10 13:44     ` Stefan Hajnoczi
2023-03-10 15:14       ` Ming Lei
2023-03-10 16:39         ` Stefan Hajnoczi
2023-03-10 16:56         ` Stefan Hajnoczi [this message]
2023-03-15 15:18           ` Jens Axboe
2023-03-15 15:15         ` Stefan Hajnoczi
2023-03-15 15:19           ` Jens Axboe
2023-03-15 19:01             ` Stefan Hajnoczi
2023-03-15 19:10               ` Jens Axboe

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