linux-kernel - Re: 2.6.19-rc5: grub is much slower resuming from suspend-to-disk than in 2.6.18

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Date:	Mon, 13 Nov 2006 21:54:38 +0300
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	Stefan Seyfried <seife@...e.de>
Cc:	linux-kernel@...r.kernel.org, Pavel Machek <pavel@....cz>
Subject: Re: 2.6.19-rc5: grub is much slower resuming from suspend-to-disk than in 2.6.18

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On Monday 13 November 2006 11:15, Stefan Seyfried wrote:
> Hi,
>
> On Mon, Nov 13, 2006 at 06:42:15AM +0300, Andrey Borzenkov wrote:
> > On Sunday 12 November 2006 17:55, Pavel Machek wrote:
> > > On Sun 12-11-06 14:36:41, Andrey Borzenkov wrote:
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> > > > This is rather funny; in 2.6.19-rc5 grub is *really* slow loading
> > > > kernel when I switch on the system after suspend to disk. Actually,
> > > > after kernel has been loaded, the whole resuming (up to the point I
> > > > have usable
>
> The most important question:
> What filesystem is your /boot on? I'd bet quite some money that it is
> reiser or some other journaling FS (not ext3).
>

there is no /boot, I use single / which is reiser.

> > > > desktop again) takes about three time less than the process of
> > > > loading kernel + initrd. During loading disk LED is constantly lit.
> > > > This almost looks like kernel leaves HDD in some strange state,
> > > > although I always assumed HDD/IDE is completely reinitialized in this
> > > > case.
> > >
> > > Seems like broken hw, really. No state should survive machine
> > > poweroff.
>
> No. Broken FS / crappy GRUB.
>
> > To recap - this never happens upon simple power off; I do not remember
> > this to
>
> I am pretty sure that it will also happen if you do "updatedb &", wait a
> minute and then do a _HARD_ power off.
>
> I am pretty sure that it has nothing to do with the kernel version, just
> with the layout of your /boot partition (which of course changes with every
> kernel update). In other words: until now, you just have been lucky.

The idea is nice; unfortunately it fails to explain the difference 
between 'poweroff' and 'suspend disk' cases. I doubt disk layout is changed 
between them.

regards

- -andrey
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