Ingo Molnar wrote:
* Gleb Natapov <gleb@xxxxxxxxxx> wrote:
Hi,
S3 sleep no longer works on x86_64 (at least in KVM, but it looks like
this is the kernel bug). Kernel 2.6.26 works. I think that the commit
that caused the problem is a939098af, but I can't be 100% sure since
compilation is broken at this point.
Triple fault happens during S3 resume. It happens in
arch/x86/kernel/head_64.S during access to GDT after it was loaded on
line 213 (lgdt early_gdt_descr(%rip)) early_gdt_descr points to
per_cpu__gdt_page and this address contains valid GDT entries during a
regular boot, but on S3 resume in contains garbage. It seems that
per_cpu area is reallocated somewhere, but I don't understand this
magic enough to fix it. Can somebody look at this and explain what
happens?
could you check whether the (post-v2.6.27) upstream fix below does the
trick for you?
Ingo
From 3038edabf48f01421c621cb77a712b446d3a5d67 Mon Sep 17 00:00:00 2001
From: Rafael J. Wysocki <rjw@xxxxxxx>
Date: Fri, 17 Oct 2008 01:26:27 +0200
Subject: [PATCH] x86 ACPI: fix breakage of resume on 64-bit UP systems with SMP kernel
x86 ACPI: Fix breakage of resume on 64-bit UP systems with SMP kernel
Is this patch scheduled for 2.6.27-stable? If not, it sounds like it
should be.
-hpa
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