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From: John Baldwin <jhb@freebsd.org>
To: Adrian Chadd <adrian@freebsd.org>
Subject: Re: signal 8 (floating point exception) upon resume
Date: Tue, 25 Mar 2014 15:46:51 -0400
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Cc: "freebsd-mobile@freebsd.org" <freebsd-mobile@freebsd.org>,
 freebsd-current <freebsd-current@freebsd.org>,
 Konstantin Belousov <kib@freebsd.org>, Bruce Evans <bde@freebsd.org>,
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On Sunday, March 23, 2014 4:41:24 pm Adrian Chadd wrote:
> [snip]
> 
> Hi,
> 
> As part of this thread, a whole lot of stuff was thrown around to try
> and fix / improve the correctness of this.
> 
> But it still happens to me in -HEAD i386. I updated to r263418 and
> it's now doing it around 30-50% of the time I resume.

Yes, nothing has changed in HEAD.

> So, since I really am trying to avoid getting neck deep in learning
> (by myself) a new thing right now, would someone be willing to help me
> through the process of (a) learning how this is all supposed to work
> (which thanks to jhb and bde, I think I've learnt from the posts in
> this thread) and (b) some things to try out? I'll be able to report
> the results of this pretty quickly.

You can try www.freebsd.org/~jhb/patches/i386_fpu_suspend2.patch.  You
could have tried the first patch I posted here earlier when I first
posted it as well. :)

-- 
John Baldwin