On Wed 12-07-06 09:29:40, Hu, Fenghua wrote:
> Hi all,
> 
> I am struggling with a S4 issue. On a Napa dual-core laptop, sometimes
> when resuming from S4, kernel panic occurs, then system reboots. After
> some investigation, I found it's due to CPU1(AP) can't be woken up in
> time, and
> this can be alleviated, even eliminated by introducing more delay in
> function wakeup_secondary_cpu().In official kernel tree, there were
> three lines in this function for delaying: mdelay(10), udelay(300) and
> udelay(200), now I changed them all to mdelay(500). Seems incorrect
> timing has led to the issue. Could you help me to root cause it? Thanks.

Do you have a copy of panic message and a patch? Or perhaps you just
want to ask on lkml for testing?

-- 
Thanks for all the (sleeping) penguins.
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