From: Nigel Cunningham <ncunningham@cyclades.com>
To: vatsa@in.ibm.com
Cc: Li Shaohua <shaohua.li@intel.com>, Andrew Morton <akpm@osdl.org>,
Linus Torvalds <torvalds@osdl.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: PATCH: Fix race in cpu_down (hotplug cpu)
Date: Mon, 19 Sep 2005 15:35:22 +1000 [thread overview]
Message-ID: <1127108122.9696.90.camel@localhost> (raw)
In-Reply-To: <20050919052830.GB8653@in.ibm.com>
On Mon, 2005-09-19 at 15:28, Srivatsa Vaddagiri wrote:
> On Mon, Sep 19, 2005 at 03:23:01PM +1000, Nigel Cunningham wrote:
> > Maybe I'm just an ignoramus, but I was thinking (without being a
> > scheduler expert at all) that if the idle thread was already running,
> > trying to set it up to run next might possibly have zero effect. I've
>
> sched_idle_next actually adds the idle task to its runqueue (normally
> it is not present in a runqueue while running) and as well changes its
> priority/policy. So it does have *some* effect!
Ok.
> > added a bit of debugging code to try and see in better detail what's
> > happening.
>
> Could you elaborate (with some stack traces maybe) on the deadlock you are
> seeing during resume? Maybe that can throw some light.
I'll try. I'm having trouble reproducing it now (yes, having reversed my
patch!).
Regards,
Nigel
--
next prev parent reply other threads:[~2005-09-19 5:35 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-19 4:48 PATCH: Fix race in cpu_down (hotplug cpu) Li, Shaohua
2005-09-19 5:10 ` Srivatsa Vaddagiri
2005-09-19 5:31 ` Shaohua Li
2005-09-19 5:57 ` Srivatsa Vaddagiri
2005-09-19 6:11 ` Nigel Cunningham
2005-09-19 6:23 ` Srivatsa Vaddagiri
2005-09-19 6:29 ` Nick Piggin
2005-09-19 7:00 ` Srivatsa Vaddagiri
2005-09-19 6:31 ` Nigel Cunningham
2005-09-19 7:09 ` Srivatsa Vaddagiri
2005-09-19 6:37 ` Shaohua Li
2005-09-19 6:36 ` Nick Piggin
2005-09-19 6:54 ` Nigel Cunningham
2005-09-19 7:12 ` Shaohua Li
2005-09-19 7:22 ` Nick Piggin
2005-09-19 7:28 ` Ingo Molnar
2005-09-19 7:37 ` Nick Piggin
2005-09-19 22:55 ` Nigel Cunningham
2005-09-20 4:41 ` Srivatsa Vaddagiri
2005-09-19 7:07 ` Srivatsa Vaddagiri
2005-09-19 5:23 ` Nigel Cunningham
2005-09-19 5:28 ` Srivatsa Vaddagiri
2005-09-19 5:35 ` Nigel Cunningham [this message]
2005-09-19 7:43 ` Where do packets sent to 255.255.255.255 go? Wei-Che, Hsu
-- strict thread matches above, loose matches on Subject: below --
2005-09-19 3:28 PATCH: Fix race in cpu_down (hotplug cpu) Nigel Cunningham
2005-09-19 4:22 ` Srivatsa Vaddagiri
2005-09-19 3:15 Nigel Cunningham
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 \
--in-reply-to=1127108122.9696.90.camel@localhost \
--to=ncunningham@cyclades.com \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
--cc=shaohua.li@intel.com \
--cc=torvalds@osdl.org \
--cc=vatsa@in.ibm.com \
--cc=zwane@arm.linux.org.uk \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.