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| author | Konrad Rzeszutek <konrad@darnok.org> | 2007-07-17 04:03:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:04 -0700 |
| commit | 1c978b935e81da9434342f0bc8263c6cfe1214ce (patch) | |
| tree | 5455b42f7853317be7cafbdb42fae0f591990805 /arch | |
| parent | 2a41de48b81e61fbe260ae5031ebcb6f935f35fb (diff) | |
| download | linux-stable-1c978b935e81da9434342f0bc8263c6cfe1214ce.tar.gz linux-stable-1c978b935e81da9434342f0bc8263c6cfe1214ce.tar.bz2 linux-stable-1c978b935e81da9434342f0bc8263c6cfe1214ce.zip | |
Inhibit NMI watchdog when Alt-SysRq-T operation is underway
On large memory configuration with not so fast CPUs the NMI watchdog is
triggered when memory addresses are being gathered and printed. The code
paths for Alt-SysRq-t are sprinkled with touch_nmi_watchdog in various
places but not in this routine (or in the loop that utilizes this
function). The patch has been tested for regression on large CPU+memory
configuration (128 logical CPUs + 224 GB) and 1,2,4,16-CPU sockets with
various memory sizes (1,2,4,6,20).
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/kernel/traps.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index 6963b64a76ca..74cbeb2e99a6 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -330,6 +330,7 @@ static int print_trace_stack(void *data, char *name) static void print_trace_address(void *data, unsigned long addr) { + touch_nmi_watchdog(); printk_address(addr); } |