linux-kernel - Re: [PATCH v2] Add suspend/resume for HPET

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Message-Id: <1175357387.28263.31.camel@localhost.localdomain>
Date:	Sat, 31 Mar 2007 18:09:47 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	Maxim Levitsky <maximlevitsky@...il.com>,
	Sergei Shtylyov <sshtylyov@...mvista.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, pavel@...e.cz,
	linux-pm@...ts.osdl.org, gregkh@...e.de,
	linux-pci@...ey.karlin.mff.cuni.cz,
	Jens Axboe <jens.axboe@...cle.com>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	jgarzik@...ox.com, linux-ide@...r.kernel.org,
	"Michael S. Tsirkin" <mst@...lanox.co.il>
Subject: Re: [PATCH v2] Add suspend/resume for HPET

On Sun, 2007-04-01 at 00:01 +0800, Jeff Chua wrote:
> On 3/31/07, Thomas Gleixner <tglx@...utronix.de> wrote:
> 
> > Jeff still seems to have problems with CONFIG_NO_HZ=n and it might be
> > caused by time keeping / tick management resume happening before the
> > HPET resume.
> 
> 
> me>Confirmed that suspend/resume disk/ram works on X60s with
> me>CONFIG_HPET_TIMER=y and CONFIG_NO_HZ unset.
> me> But suspend to disk still hang with CONFIG_NO_HZ unset.
> 
> 
> Oops, sorry. Typo (as a result copy/paste using mouse)
>     ... I actually meant CONFIG_NO_HZ "set".
> 
> Just to be clear, suspend to disk still hang with CONFIG_NO_HZ=y. It
> hang just before you see the percent saving %.

Ah, that's a different one then. In that path the timers should be
alive, but who knows.

	tglx


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