[PATCH] fix impossible VmallocChunk
VmallocTotal: 34359738367 kB
VmallocUsed: 266288 kB
VmallocChunk: 18014366299193295 kB
is unsettling - x86_64 and some other architectures keep a separate address
range for modules in vmalloc's vmlist, which /proc/meminfo should pass over.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/proc/mmu.c b/fs/proc/mmu.c
index a704103..25d2d9c 100644
--- a/fs/proc/mmu.c
+++ b/fs/proc/mmu.c
@@ -50,13 +50,23 @@
read_lock(&vmlist_lock);
for (vma = vmlist; vma; vma = vma->next) {
+ unsigned long addr = (unsigned long) vma->addr;
+
+ /*
+ * Some archs keep another range for modules in vmlist
+ */
+ if (addr < VMALLOC_START)
+ continue;
+ if (addr >= VMALLOC_END)
+ break;
+
vmi->used += vma->size;
- free_area_size = (unsigned long) vma->addr - prev_end;
+ free_area_size = addr - prev_end;
if (vmi->largest_chunk < free_area_size)
vmi->largest_chunk = free_area_size;
- prev_end = vma->size + (unsigned long) vma->addr;
+ prev_end = vma->size + addr;
}
if (VMALLOC_END - prev_end > vmi->largest_chunk)