On Thu, 2007-04-05 at 19:50 -0700, Linus Torvalds wrote:
> Ok,
>  I don't think there really is anything very interesting here, but we're 
> hopefully whittling down the list of regressions, and fixing various 
> random other small issues while at it.
> 
> Some smallish MIPS updates, networking (and network driver) fixes, removal 
> of a long obsolete framebuffer driver, etc etc. The shortlog really tells 
> the story.
> 
> We should be getting close to a 2.6.21 release, so please update any 
> regression reports you've done,

regression update for 21-rc6:

1) all s2ram and NO_HZ related things seem to be resolved on my macbook
pro, also 
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y

don't break resume anymore.

2) However I am still having problems with
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_HPET=y
+CONFIG_HPET_MMAP=y
although the machine resumes, I've managed to get the attached oops.

3) Subject    : SATA breakage on resume
References : http://lkml.org/lkml/2007/3/7/233
Submitter  : Thomas Gleixner <tglx@linutronix.de>
             Soeren Sonnenburg <kernel@nn7.de>
Status     : unknown

I am still seeing these messages after a suspend/resume cycle (though
all devices work even after multiple suspend/resume cycles)

ATA: abnormal status 0x80 on port 0x000140df
ata3.01: revalidation failed (errno=-2)
ata3: failed to recover some devices, retrying in 5 secs
ata1.00: configured for UDMA/33
ATA: abnormal status 0x7F on port 0x000140df
ATA: abnormal status 0x7F on port 0x000140df
ata3.01: configured for UDMA/133

So that's been a big step forward...
Soeren
-- 
For the one fact about the future of which we can be certain is that it
will be utterly fantastic. -- Arthur C. Clarke, 1962