linux-kernel - Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325

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: <200806181640.45595.rjw@sisk.pl>
Date:	Wed, 18 Jun 2008 16:40:44 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325

On Wednesday, 18 of June 2008, Thomas Gleixner wrote:
> On Wed, 18 Jun 2008, Thomas Gleixner wrote:
> > On Wed, 18 Jun 2008, Rafael J. Wysocki wrote:
> > > On Wednesday, 18 of June 2008, Rafael J. Wysocki wrote:
> > > > On Tuesday, 17 of June 2008, Rafael J. Wysocki wrote:
> > > > > On Tuesday, 17 of June 2008, Thomas Gleixner wrote:
> > > > > > On Tue, 17 Jun 2008, Rafael J. Wysocki wrote:
> > > > > > > 
> > > > > > > BTW, with the C1E patches reverted I don't get the
> > > > > > > WARNING: at /home/rafael/src/linux-next/kernel/smp.c:215 smp_call_function_single+0x3d/0xa2
> > > > > > > in the log.  Thomas?
> > > > > > 
> > > > > > Yeah, my bad. Fix below.
> > > > > 
> > > > > Thanks, it eliminates the WARNING, but still the box doesn't work with
> > > > > the "x86: add C1E aware idle function" patch applied, even with 'highres=off'.
> > > > > 
> > > > > The main symptom is that CPU loads are computed incorrectly (I got X using 126%
> > > > > of CPU time from 'top', for example).  Apart from this, some processes (like
> > > > > gkrellm) seem to be 'frozen' and only change their state in 'jumps', as though
> > > > > they only got CPU from time to time at random.
> > > > > 
> > > > > Reverting the above-mentioned patch fixes those problems.
> > > > 
> > > > Ah.  If your fix is replaced with the appended one, the system happily works
> > > > with C1E and highres.
> > > 
> > > Scratch that.  The symptoms appeared later this time, that's all.  I've just got
> > > b43 consuming 90+ % of the CPU time. :-(
> > 
> > I would have been pretty surprised if it had helped :)
> > 
> > Does the box boot when you disable the local apic timer on the kernel
> > command line with the patch applied ?
> > 
> > Also does forcing hpet change anything ?
> 
> I just checked that the original c1e series and the affected code in
> tip are not different. IIRC you confirmed that the C1E patches would
> work on your box. So I wonder what else got changed which causes these
> problems.

Well, to eliminate any possible correlations, do you have a version of the
series or a single patch against the current mainline?

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/