linux-kernel - Re: request_module: runaway loop modprobe net-pf-1 (is Re: Linux 2.6.21-rc1)

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Message-ID: <87abz75hzs.fsf@duaron.myhome.or.jp>
Date:	Thu, 22 Feb 2007 06:16:23 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Greg KH <greg@...ah.com>
Cc:	"YOSHIFUJI Hideaki \/ \?$B5HF#1QL\@" <yoshfuji@...ux-ipv6.org>,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>
Subject: Re: request_module: runaway loop modprobe net-pf-1 (is Re: Linux 2.6.21-rc1)

Greg KH <greg@...ah.com> writes:

> On Thu, Feb 22, 2007 at 04:12:04AM +0900, OGAWA Hirofumi wrote:
>> YOSHIFUJI Hideaki / ?$B5HF#1QL@ <yoshfuji@...ux-ipv6.org> writes:
>> 
>> > In article <Pine.LNX.4.64.0702202043280.4043@...dy.linux-foundation.org> (at Tue, 20 Feb 2007 20:53:45 -0800 (PST)), Linus Torvalds <torvalds@...ux-foundation.org> says:
>> >
>> >> But there's a ton of architecture updates (arm, mips, powerpc, x86, you 
>> >> name it), ACPI updates, and lots of driver work. And just a lot of 
>> >> cleanups.
>> >
>> > I cannot boot 2.6.21-rc1; it falls into OOM-Killer.
>> >
>> > Interesting error message I can see is:
>> >    request_module: runaway loop modprobe net-pf-1
>> >
>> > After bisecting, the commit
>> >   Driver core: let request_module() send a /sys/modules/kmod/-uevent
>> > (id c353c3fb0700a3c17ea2b0237710a184232ccd7f) is to blame.
>> >
>> > Reverting it fixes the issue to me.
>> 
>> /sbin/hotplug needs some module, but request_module() call /sbin/hotplug loop?
>> Hm.. does the patch fix the problem?
>
> How does it loop?

E.g. something calls the request_modle(), and if hotplug is using
socket(PF_UNIX) and af_unix is module, it also calls request_modle()?

Just my guess though...
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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