From: Stefan Hajnoczi <stefanha@redhat.com>
To: Ming Lei <ming.lei@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
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: <ZAtJPG3NDCbhAvZ7@ovpn-8-16.pek2.redhat.com>
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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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next prev 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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