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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-11-12 23:22:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 23:28:51 +0100 |
| commit | 97a70e548bd97d5a46ae9d44f24aafcc013fd701 (patch) | |
| tree | d6374f548e88c41d212cef1494cf347f514e4cf3 /arch/x86/include/asm/mmzone_32.h | |
| parent | 3edac25f2e8ac8c2a84904c140e1aeb434e73e75 (diff) | |
| download | linux-0-day-97a70e548bd97d5a46ae9d44f24aafcc013fd701.tar.gz linux-0-day-97a70e548bd97d5a46ae9d44f24aafcc013fd701.tar.xz | |
x86, hibernate: fix breakage on x86_32 with CONFIG_NUMA set
Impact: fix crash during hibernation on 32-bit NUMA
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@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/mmzone_32.h')
| -rw-r--r-- | arch/x86/include/asm/mmzone_32.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h index 485bdf059ffbe..07f1af494ca5c 100644 --- a/arch/x86/include/asm/mmzone_32.h +++ b/arch/x86/include/asm/mmzone_32.h @@ -34,10 +34,14 @@ static inline void get_memcfg_numa(void) extern int early_pfn_to_nid(unsigned long pfn); +extern void resume_map_numa_kva(pgd_t *pgd); + #else /* !CONFIG_NUMA */ #define get_memcfg_numa get_memcfg_numa_flat +static inline void resume_map_numa_kva(pgd_t *pgd) {} + #endif /* CONFIG_NUMA */ #ifdef CONFIG_DISCONTIGMEM |