From: Jens Axboe <[email protected]>
To: Linus Torvalds <[email protected]>
Cc: io-uring <[email protected]>
Subject: Re: [GIT PULL] io_uring fixes for 5.12-rc3
Date: Fri, 12 Mar 2021 14:35:59 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAHk-=wiNcvKE8QbP1x08F_SfjnnehehUyak8bZryxJt=EcL7Mw@mail.gmail.com>
On 3/12/21 2:34 PM, Linus Torvalds wrote:
> On Fri, Mar 12, 2021 at 1:25 PM Linus Torvalds
> <[email protected]> wrote:
>>
>> Note: I've pulled your tree, I just want you to dig deeper, verify,
>> and check this for perhaps re-instating freezability.
>
> Also note that I don't think it's _just_ that freeze_task() thing that
> is needed for the fix.
>
> I think the io_uring threads then need to do the whole
> "try_to_freeze()" dance in the main loop or something, so that it does
> actually freeze.
Right, and they did before the change. The freezing did work, the thaw
just left us with that sigpending and caused the never-scheduler busy
behavior. But I'll unify it all when the thawing is sorted (which I
think it is), and then enable it for all three types.
--
Jens Axboe
next prev parent reply other threads:[~2021-03-12 21:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 19:48 [GIT PULL] io_uring fixes for 5.12-rc3 Jens Axboe
2021-03-12 21:17 ` Linus Torvalds
2021-03-12 21:24 ` Linus Torvalds
2021-03-12 21:25 ` Linus Torvalds
2021-03-12 21:34 ` Linus Torvalds
2021-03-12 21:35 ` Jens Axboe [this message]
2021-03-12 21:33 ` Jens Axboe
2021-03-12 21:31 ` Jens Axboe
2021-03-12 21:52 ` pr-tracker-bot
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