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| author |   Prarit Bhargava <prarit@redhat.com> | 2007-10-17 18:04:34 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@inhelltoy.tec.linutronix.de> | 2007-10-17 20:15:41 +0200 |
| commit | 27eb0b288fb3b46350f3e6c2fad0b36937a4cc85 (patch) | |
| tree | ccd2d7cc752036b1e3654ce6b984c885ab6a0629 /arch/x86/mm | |
| parent | x86: fix CONFIG_PAGEALLOC related boot hangs/OOMs (diff) | |
| download | linux-dev-27eb0b288fb3b46350f3e6c2fad0b36937a4cc85.tar.xz linux-dev-27eb0b288fb3b46350f3e6c2fad0b36937a4cc85.zip | |
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/x86/mm')
| -rw-r--r-- | 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 bbaa2b153934..be61a1d845a4 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)) |