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authorPrarit Bhargava <prarit@redhat.com>2007-10-17 18:04:34 +0200
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-17 20:15:41 +0200
commit27eb0b288fb3b46350f3e6c2fad0b36937a4cc85 (patch)
treeccd2d7cc752036b1e3654ce6b984c885ab6a0629 /arch
parent509a80c49c512ac88bd67b981145f925a306111b (diff)
x86: stop nmi softlockup warnings in show_mem()
When dumping memory via sysrq-m it is possible to take a bogus NMI watchdog or softlockup watchdog because the dump can take a long time on big memory systems. Occasionally tickle the watchdog when doing the dump. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/mm/pgtable_32.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index bbaa2b15393..be61a1d845a 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -6,6 +6,7 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/mm.h>
+#include <linux/nmi.h>
#include <linux/swap.h>
#include <linux/smp.h>
#include <linux/highmem.h>
@@ -39,6 +40,8 @@ void show_mem(void)
for_each_online_pgdat(pgdat) {
pgdat_resize_lock(pgdat, &flags);
for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+ if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+ touch_nmi_watchdog();
page = pgdat_page_nr(pgdat, i);
total++;
if (PageHighMem(page))