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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-13 13:34:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-13 13:34:46 -0700 |
| commit | ec1bc8e4cf47914349cbecf327ea86636bb3265e (patch) | |
| tree | 026bbc1c7e10ca49c005257cbcabe01dc804e125 /arch | |
| parent | 07f2d8c63fa439613405760841e41fce3041023f (diff) | |
| parent | 22ef882e6b5bd2bf668d10b1e2be3dc2fc365b99 (diff) | |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Ingo Molnar:
"Leftover from 4.0
Fix a local stack variable corruption with certain kdump usage
patterns (Dave Young)"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm/numa: Fix kernel stack corruption in numa_init()->numa_clear_kernel_node_hotplug()
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/numa.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index cd4785bbacb9..4053bb58bf92 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -482,9 +482,16 @@ static void __init numa_clear_kernel_node_hotplug(void) &memblock.reserved, mb->nid); } - /* Mark all kernel nodes. */ + /* + * Mark all kernel nodes. + * + * When booting with mem=nn[kMG] or in a kdump kernel, numa_meminfo + * may not include all the memblock.reserved memory ranges because + * trim_snb_memory() reserves specific pages for Sandy Bridge graphics. + */ for_each_memblock(reserved, r) - node_set(r->nid, numa_kernel_nodes); + if (r->nid != MAX_NUMNODES) + node_set(r->nid, numa_kernel_nodes); /* Clear MEMBLOCK_HOTPLUG flag for memory in kernel nodes. */ for (i = 0; i < numa_meminfo.nr_blks; i++) { |