Messages in this thread Patch in this message | | | From | Jiang Liu <> | Subject | [RFC Patch V1 11/30] mm, char/mspec.c: Use cpu_to_mem()/numa_mem_id() to support memoryless node | Date | Fri, 11 Jul 2014 15:37:28 +0800 |
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When CONFIG_HAVE_MEMORYLESS_NODES is enabled, cpu_to_node()/numa_node_id() may return a node without memory, and later cause system failure/panic when calling kmalloc_node() and friends with returned node id. So use cpu_to_mem()/numa_mem_id() instead to get the nearest node with memory for the/current cpu.
If CONFIG_HAVE_MEMORYLESS_NODES is disabled, cpu_to_mem()/numa_mem_id() is the same as cpu_to_node()/numa_node_id().
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> --- drivers/char/mspec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c index f1d7fa45c275..20e893cde9fd 100644 --- a/drivers/char/mspec.c +++ b/drivers/char/mspec.c @@ -206,7 +206,7 @@ mspec_fault(struct vm_area_struct *vma, struct vm_fault *vmf) maddr = (volatile unsigned long) vdata->maddr[index]; if (maddr == 0) { - maddr = uncached_alloc_page(numa_node_id(), 1); + maddr = uncached_alloc_page(numa_mem_id(), 1); if (maddr == 0) return VM_FAULT_OOM; -- 1.7.10.4
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