From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: "Matthew C. Dobson [imap]" <colpatch@us.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: sched domains bringup race?
Date: Fri, 16 Jul 2004 13:03:53 +1000 [thread overview]
Message-ID: <40F74599.7000606@yahoo.com.au> (raw)
In-Reply-To: <1089944026.32312.47.camel@nighthawk>
Dave Hansen wrote:
> I keep getting oopses for the non-boot CPU in find_busiest_group().
> This occurs the first time that the CPU goes idle. Those groups are set
> up in sched_init_smp(), which is called after smp_init():
>
> static int init(void * unused)
> {
> ...
> fixup_cpu_present_map();
> smp_init();
> sched_init_smp();
>
> But, the idle threads for the secondary CPUs are initialized in
> smp_init(). So, what happens when a CPU tries to schedule (using sched
> domains) before sched_init_smp() completes? I think it goes boom! :)
>
It shouldn't because sched_init sets up dummy domains for
all runqueues.
Obviously something is going wrong somewhere though.
next prev parent reply other threads:[~2004-07-16 3:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-16 2:13 sched domains bringup race? Dave Hansen
2004-07-16 3:03 ` Nick Piggin [this message]
2004-07-16 3:30 ` Dave Hansen
2004-07-16 3:46 ` Nick Piggin
2004-07-16 5:27 ` Nick Piggin
2004-07-18 20:45 ` Keshavamurthy Anil S
2004-07-19 7:31 ` Nick Piggin
2004-07-22 21:55 ` Nathan Lynch
2004-07-22 23:23 ` Keshavamurthy Anil S
2004-07-23 0:33 ` Nick Piggin
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=40F74599.7000606@yahoo.com.au \
--to=nickpiggin@yahoo.com.au \
--cc=colpatch@us.ibm.com \
--cc=haveblue@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
/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