* Rafael J. Wysocki <rjw@xxxxxxx> wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > Subject: x86: Hibernate: Fix breakage on x86_32 with CONFIG_NUMA set > > The NUMA code on x86_32 creates special memory mapping that allows > each node's pgdat to be located in this node's memory. For this > purpose it allocates a memory area at the end of each node's memory > and maps this area so that it is accessible with virtual addresses > belonging to low memory. As a result, if there is high memory, > these NUMA-allocated areas are physically located in high memory, > although they are mapped to low memory addresses. > > Our hibernation code does not take that into account and for this > reason hibernation fails on all x86_32 systems with CONFIG_NUMA=y and > with high memory present. Fix this by adding a special mapping for > the NUMA-allocated memory areas to the temporary page tables created > during the last phase of resume. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> > Cc: Pavel Machek <pavel@xxxxxxx> > Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> > Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> > --- > arch/x86/include/asm/mmzone_32.h | 4 ++++ > arch/x86/mm/numa_32.c | 35 +++++++++++++++++++++++++++++++++++ > arch/x86/power/hibernate_32.c | 4 ++++ > 3 files changed, 43 insertions(+) Applied to tip/x86/numa, thanks Rafael for the detective work! Ingo _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
