From: Michal Hocko <mhocko@suse.cz>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>, linux-mm@kvack.org
Subject: Re: khugepaged eating 100%CPU
Date: Mon, 7 Feb 2011 22:16:01 +0100 [thread overview]
Message-ID: <20110207211601.GA25665@tiehlicka.suse.cz> (raw)
In-Reply-To: <20110207210517.GA24837@tiehlicka.suse.cz>
On Mon 07-02-11 22:06:54, Michal Hocko wrote:
> Hi Andrea,
>
> I am currently running into an issue when khugepaged is running 100% on
> one of my CPUs for a long time (at least one hour as I am writing the
> email). The kernel is the clean 2.6.38-rc3 (i386) vanilla kernel.
>
> I have tried to disable defrag but it didn't help (I haven't rebooted
> after setting the value). I am not sure what information is helpful and
> also not sure whether I am able to reproduce it after restart (it is the
> first time I can see this problem) so sorry for the poor report.
>
> Here is some basic info which might be useful (config and sysrq+t are
> attached):
> =========
And I have just realized that I forgot about the daemon stack:
# cat /proc/573/stack
[<c019c981>] shrink_zone+0x1b9/0x455
[<c019d462>] do_try_to_free_pages+0x9d/0x301
[<c019d803>] try_to_free_pages+0xb3/0x104
[<c01966d7>] __alloc_pages_nodemask+0x358/0x589
[<c01bf314>] khugepaged+0x13f/0xc60
[<c014c301>] kthread+0x67/0x6c
[<c0102db6>] kernel_thread_helper+0x6/0x10
[<ffffffff>] 0xffffffff
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-02-07 21:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-07 21:06 Michal Hocko
2011-02-07 21:16 ` Michal Hocko [this message]
2011-02-07 21:45 ` Michal Hocko
2011-02-07 23:12 ` Andrea Arcangeli
2011-02-08 8:45 ` Michal Hocko
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=20110207211601.GA25665@tiehlicka.suse.cz \
--to=mhocko@suse.cz \
--cc=aarcange@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.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