On Fri 2008-10-17 01:26:27, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > x86 ACPI: Fix breakage of resume on 64-bit UP systems with SMP kernel > > We are now using per CPU GDT tables in head_64.S and the original > early_gdt_descr.address is invalidated after boot by > setup_per_cpu_areas(). This breaks resume from suspend to RAM on > x86_64 UP systems using SMP kernels, because this part of head_64.S > is also executed during the resume and the invalid GDT address > causes the system to crash. It doesn't break on 'true' SMP systems, > because early_gdt_descr.address is modified every time > native_cpu_up() runs. However, during resume it should point to the > GDT of the boot CPU rather than to another CPU's GDT. > > For this reason, during suspend to RAM always make > early_gdt_descr.address point to the boot CPU's GDT. > > This fixes http://bugzilla.kernel.org/show_bug.cgi?id=11568, which > is a regression from 2.6.26. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> > Reported-and-tested-by: Andy Wettstein <ajw1980@xxxxxxxxx> Acked-by: Pavel Machek <pavel@xxxxxxx> Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
