Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=27eb0b288fb3b46350f3e6c2fad0b36937a4cc85
Commit:     27eb0b288fb3b46350f3e6c2fad0b36937a4cc85
Parent:     509a80c49c512ac88bd67b981145f925a306111b
Author:     Prarit Bhargava <[EMAIL PROTECTED]>
AuthorDate: Wed Oct 17 18:04:34 2007 +0200
Committer:  Thomas Gleixner <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 20:15:41 2007 +0200

    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 <[EMAIL PROTECTED]>
    Cc: Andi Kleen <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
 arch/x86/mm/pgtable_32.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index bbaa2b1..be61a1d 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))
-
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