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

[Adrian Bunk]

On Mon, Mar 26, 2007 at 09:25:51AM +0800, Jeff Chua wrote:
> On 3/19/07, Adrian Bunk <bunk@xxxxxxxxx> wrote:
> 
> >Subject    : ThinkPad doesn't resume from suspend to RAM
> >References : http://lkml.org/lkml/2007/2/27/80
> >             http://lkml.org/lkml/2007/2/28/348
> >Submitter  : Jens Axboe <jens.axboe@xxxxxxxxxx>
> >             Jeff Chua <jeff.chua.linux@xxxxxxxxx>
> >Status     : unknown
> >
> >
> >Subject    : suspend to disk hangs
> >References : http://lkml.org/lkml/2007/3/6/142
> >Submitter  : Jeff Chua <jeff.chua.linux@xxxxxxxxx>
> >Status     : unknown
> 
> The good news is on 2.6.21-rc5, suspend to disk, and resume from disk works.
> But, it only works with CONFIG_NO_HZ unset.

Thanks for this information.

> Setting CONFIG_NO_HZ will cause suspend to disk to hang just before
> saving memory to disk.

Thanks, noted.

> 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@xxxxxxxxxxxxxx>
Handled-By : Thomas Gleixner <tglx@xxxxxxxxxxxxx>
             Ingo Molnar <mingo@xxxxxxx>
Status     : problem is being debugged

> Thanks,
> Jeff.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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