Re: kern/37933: very frequent crashes after suspend/resume

["Jared D. McNeill" <jmcneill%invisible.ca@localhost>]

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, 
 gnats-admin%NetBSD.org@localhost, netbsd-bugs%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
 
 Cheers,
 Jared