From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: Re: [PATCH 8/8] io_uring: warn when ring exit takes too long
Date: Fri, 5 Mar 2021 11:15:50 +0000 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 05/03/2021 04:25, Jens Axboe wrote:
> On 3/4/21 6:59 AM, Pavel Begunkov wrote:
>> We use system_unbound_wq to run io_ring_exit_work(), so it's hard to
>> monitor whether removal hang or not. Add WARN_ONCE to catch hangs.
>
> Minor nit, but I'd just use jiffies for this. Ala:
>
> unsigned long timeout = jiffies + 60 * HZ;
>
> if (time_after(jiffies, timeout))
> complain();
>
> That's a well known idiom, and we don't need better precision than that.
And also looks much nicer, thanks
--
Pavel Begunkov
prev parent reply other threads:[~2021-03-05 11:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 13:59 [PATCH 5.12 0/8] remove task file notes Pavel Begunkov
2021-03-04 13:59 ` [PATCH 1/8] io_uring: cancel-match based on flags Pavel Begunkov
2021-03-04 13:59 ` [PATCH 2/8] io_uring: reliably cancel linked timeouts Pavel Begunkov
2021-03-04 13:59 ` [PATCH 3/8] io_uring: make del_task_file more forgiving Pavel Begunkov
2021-03-04 13:59 ` [PATCH 4/8] io_uring: introduce ctx to tctx back map Pavel Begunkov
2021-03-04 13:59 ` [PATCH 5/8] io_uring: do ctx initiated file note removal Pavel Begunkov
2021-03-04 13:59 ` [PATCH 6/8] io_uring: don't take task ring-file notes Pavel Begunkov
2021-03-04 13:59 ` [PATCH 7/8] io_uring: index io_uring->xa by ctx not file Pavel Begunkov
2021-03-04 13:59 ` [PATCH 8/8] io_uring: warn when ring exit takes too long Pavel Begunkov
2021-03-05 4:25 ` Jens Axboe
2021-03-05 11:15 ` Pavel Begunkov [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox