Re: port-amd64/52596

[coypu%sdf.org@localhost]

The following reply was made to PR port-amd64/52596; it has been noted by GNATS.

From: coypu%sdf.org@localhost
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-amd64/52596
Date: Tue, 10 Oct 2017 20:48:28 +0000

 Hi,
 
 NetBSD should be doing the following thing almost constantly:
 if (x86_xsave_features != 0) {
 	xsave()
 
 which for your machine can be read as:
 if (x86_xsave_features != 0) {
 	panic("complain about xsave")
 
 x86_xsave_features is only written to at boot.
 If it doesn't panic instantly, something is likely corrupting its value.
 
 The ACPI functions are unrelated, it's silly about what the last
 function it prints at a backtrace is (it's after vpanic).
 
 With DEBUG/DIAGNOSTIC and some other options you might have a chance of
 tracking down the cause too
 
 can you share a kernel that caused this panic?