Re: [Xen-devel] Xen4.2 S3 regression?

[Ben Guthro <ben@xxxxxxxxxx>]

The attached patch is essentially the change you suggested, plus a
check for NULL in irq_complete_move()

This patch seems to fix some of the issues I was seeing, but not all.
MSI's are now delivered, after a handful of suspend / resumes, which
is the issue I was setting out to solve here.

However, once I get out of my debugging mode, and run without a serial
console - things start to go bad.
I am unable to get the machine to resume from S3. The fan comes on,
but I never see any graphics, or HDD activity. Of course, without a
console, I have no clues to go on, as to what is wrong.

This is similar to the other S3 problem I have observed on laptops
that never get out of the "pulsing power button" state.

I suspect they are related, but with the behavior changing so
drastically while running with the serial connection enabled - it is
rather difficult to narrow down where it might be...



On Thu, Aug 23, 2012 at 4:38 PM, Ben Guthro <ben@xxxxxxxxxx> wrote:
> On Thu, Aug 23, 2012 at 3:38 PM, Andrew Cooper
> <andrew.cooper3@xxxxxxxxxx> wrote:
>>
>> On 23/08/12 20:06, Ben Guthro wrote:
>>> No such luck.
>>
>> Huh.  It was a shot in the dark, but I was really not expecting this.
>
> Thanks for taking a look.
>
> I tested the equivalent change against the offending changeset, and it
> did, in fact solve the S3 issue back then (but not against the 4.1.3
> tag)
>
> I guess I'll do some more bisecting, with this change in place.
>
> Ben

Attachment: s3-debug
Description: Binary data

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