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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
[IA64] Stop bogus NMI & softlockup warnings in ia64 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>
Signed-off-by: Tony Luck <tony.luck@intel.com>
authored by Prarit Bhargava and committed by Tony Luck 99a19cf1 6e9de181
+3
arch/ia64/mm/contig.c
+3
arch/ia64/mm/contig.c
···
17
#include <linux/bootmem.h>
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#include <linux/efi.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <asm/meminit.h>
···
57
present = pgdat->node_present_pages;
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for(i = 0; i < pgdat->node_spanned_pages; i++) {
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struct page *page;
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if (pfn_valid(pgdat->node_start_pfn + i))
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page = pfn_to_page(pgdat->node_start_pfn + i);
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else {
···
17
#include <linux/bootmem.h>
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#include <linux/efi.h>
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#include <linux/mm.h>
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+
#include <linux/nmi.h>
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#include <linux/swap.h>
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#include <asm/meminit.h>
···
56
present = pgdat->node_present_pages;
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for(i = 0; i < pgdat->node_spanned_pages; i++) {
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struct page *page;
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+
if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
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+
touch_nmi_watchdog();
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if (pfn_valid(pgdat->node_start_pfn + i))
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page = pfn_to_page(pgdat->node_start_pfn + i);
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else {
+3
arch/ia64/mm/discontig.c
+3
arch/ia64/mm/discontig.c
···
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/bootmem.h>
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#include <linux/acpi.h>
···
534
present = pgdat->node_present_pages;
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for(i = 0; i < pgdat->node_spanned_pages; i++) {
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struct page *page;
537
if (pfn_valid(pgdat->node_start_pfn + i))
538
page = pfn_to_page(pgdat->node_start_pfn + i);
539
else {
···
16
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#include <linux/kernel.h>
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#include <linux/mm.h>
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+
#include <linux/nmi.h>
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#include <linux/swap.h>
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#include <linux/bootmem.h>
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#include <linux/acpi.h>
···
533
present = pgdat->node_present_pages;
534
for(i = 0; i < pgdat->node_spanned_pages; i++) {
535
struct page *page;
536
+
if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
537
+
touch_nmi_watchdog();
538
if (pfn_valid(pgdat->node_start_pfn + i))
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page = pfn_to_page(pgdat->node_start_pfn + i);
540
else {