linux-kernel - Re: [3/6] 2.6.21-rc4: known regressions

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Date:	Mon, 26 Mar 2007 13:37:08 +0800
From:	"Jeff Chua" <jeff.chua.linux@...il.com>
To:	"Adrian Bunk" <bunk@...sta.de>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"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,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Michael S. Tsirkin" <mst@...lanox.co.il>,
	"Ingo Molnar" <mingo@...e.hu>
Subject: Re: [3/6] 2.6.21-rc4: known regressions

On 3/26/07, Adrian Bunk <bunk@...sta.de> wrote:

> > Resume from RAM (s2ram) still broke (tried with or without
> > CONFIG_NO_HZ). Suspend to RAM seems ok, but upon resume, the screen
> > will only display "inu" and only after pressing the power button will
> > the system return to console. But "date" still doesn't advance.
>
> This might be related to the following regression:
>
> Subject    : first disk access after resume takes several minutes
>              ('date' does not advance after resume from RAM, CONFIG_NO_HZ=n)
> References : http://lkml.org/lkml/2007/3/8/117
>              http://lkml.org/lkml/2007/3/25/20
> Submitter  : Michael S. Tsirkin <mst@...lanox.co.il>
> Handled-By : Thomas Gleixner <tglx@...utronix.de>
>              Ingo Molnar <mingo@...e.hu>
> Status     : problem is being debugged

Adrian,

It's related. I tested without CONFIG_HPET_TIMER, and now my X60 can
suspend and resume from RAM (s2ram). Even better, it works
with/without CONFIG_NO_HZ.

But, suspend to disk still broke with CONFIG_NO_HZ set.

Thanks,
Jeff.
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