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Re: kern/37933: very frequent crashes after suspend/resume
The following reply was made to PR kern/37933; it has been noted by GNATS.
From: "Jared D. McNeill" <jmcneill%invisible.ca@localhost>
To: "Steven M. Bellovin" <smb%cs.columbia.edu@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, kern-bug-people%NetBSD.org@localhost,
Subject: Re: kern/37933: very frequent crashes after suspend/resume
Date: Sun, 10 Feb 2008 11:12:27 -0500
Steven M. Bellovin wrote:
> On Sat, 09 Feb 2008 21:16:56 -0500
> "Jared D. McNeill" <jmcneill%invisible.ca@localhost> wrote:
>> Are you using cpuctl to offline all APs before you suspend?
> I hadn't -- should I have? It does seem to prevent the problem; at
> least, I wasn't able to cause any crashes when I tried that. (To be
> sure, I got another crash when I shut down the machine to try that
> test; I haven't looked at that dump yet....)
> For now, I'm going to put a cpuctl in my suspend/resume scripts -- it
> had reached the point where I was shutting down rather than risking a
> second suspend.
I can't remember if I raised a PR on this or not, but there are issues
with spinning up the APs as early as we do.
My powerd scripts simply do:
/usr/sbin/cpuctl offline 1
sysctl -w machdep.sleep_state=3
/usr/sbin/cpuctl online 1
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