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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-13 13:34:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-13 13:34:46 -0700
commitec1bc8e4cf47914349cbecf327ea86636bb3265e (patch)
tree026bbc1c7e10ca49c005257cbcabe01dc804e125 /arch
parent07f2d8c63fa439613405760841e41fce3041023f (diff)
parent22ef882e6b5bd2bf668d10b1e2be3dc2fc365b99 (diff)
downloadkernel-ec1bc8e4cf47914349cbecf327ea86636bb3265e.tar.gz
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.c11
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++) {