linux-kernel - Re: Warning in during hotplug on 2.6.27-rc2-git5

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200808171925.48584.rjw@sisk.pl>
Date:	Sun, 17 Aug 2008 19:25:47 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Greg KH <greg@...ah.com>,
	"Langsdorf, Mark" <mark.langsdorf@....com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Warning in during hotplug on 2.6.27-rc2-git5

On Sunday, 17 of August 2008, Andi Kleen wrote:
> > > > I'm still seeing it on 2.6.27-rc2, even with the 
> > > > patch here http://lkml.org/lkml/2008/7/30/171 and the
> > > > wbinvd_halt code patch applied.  Maybe something else
> > > > broke in some of the recent hotplug changes?
> > > 
> > > My guess is that MCE does somthing that is not allowed by sysfs any more.
> > 
> > Hm, sysfs hasn't changed any in 2.6.27-rcX that I know of.
> 
> mce hasn't either in this regard. My current theory is that the CPU 
> up/down notifiers are not balanced anymore (as in duplicated up events) 

It doesn't look like this is the case.  Moreover, had that been the case, we'd
have had many reports from people doing suspend/hibernation, but it doesn't
happen.

I think that cpu_down() fails for some reason and that causes the subsequent
onlining to fail.  I'd like to find out what's the root cause of that.

Thanks,
Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/