From: Jens Axboe <[email protected]>
To: Pavel Begunkov <[email protected]>, [email protected]
Cc: [email protected]
Subject: Re: [PATCH 1/2] io_uring: wait potential ->release() on resurrect
Date: Fri, 19 Feb 2021 20:40:46 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <75e1c94aff46a5bc409f50e50207f4d9a01ff9a0.1613785076.git.asml.silence@gmail.com>
On 2/19/21 6:39 PM, Pavel Begunkov wrote:
> There is a short window where percpu_refs are already turned zero, but
> we try to do resurrect(). Play nicer and wait for all users to leave RCU
> section.
We need to do something better than synchronize_rcu() here, that can
take a long time on a loaded box. I'll try and think about this one.
--
Jens Axboe
next prev parent reply other threads:[~2021-02-20 3:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-20 1:39 [PATCH 0/2] random fixes Pavel Begunkov
2021-02-20 1:39 ` [PATCH 1/2] io_uring: wait potential ->release() on resurrect Pavel Begunkov
2021-02-20 3:40 ` Jens Axboe [this message]
2021-02-20 3:47 ` Pavel Begunkov
2021-02-20 3:53 ` Jens Axboe
2021-02-20 1:39 ` [PATCH 2/2] io_uring: fix leaving invalid req->flags Pavel Begunkov
2021-02-20 4:17 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2021-02-20 17:21 [PATCH 0/2] resurrect Pavel Begunkov
2021-02-20 17:21 ` [PATCH 1/2] io_uring: wait potential ->release() on resurrect Pavel Begunkov
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