diff options
| author | David Ahern <david.ahern@oracle.com> | 2015-03-19 16:06:53 -0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-04-09 13:13:51 +0200 |
| commit | 14b7dc59ca97898e99eb3b93e2e3a756856d0742 (patch) | |
| tree | d0e52e247aa33c066ef5173975d94fda115891b9 /arch | |
| parent | 6b74b2d800e5ea2f023eef045180a0f563d8b5bc (diff) | |
sparc: Touch NMI watchdog when walking cpus and calling printk
[ Upstream commit 31aaa98c248da766ece922bbbe8cc78cfd0bc920 ]
With the increase in number of CPUs calls to functions that dump
output to console (e.g., arch_trigger_all_cpu_backtrace) can take
a long time to complete. If IRQs are disabled eventually the NMI
watchdog kicks in and creates more havoc. Avoid by telling the NMI
watchdog everything is ok.
Signed-off-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/kernel/process_64.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c index fa49b80d8ab6..6616c775c4dd 100644 --- a/arch/sparc/kernel/process_64.c +++ b/arch/sparc/kernel/process_64.c @@ -280,6 +280,8 @@ void arch_trigger_all_cpu_backtrace(void) printk(" TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n", gp->tpc, gp->o7, gp->i7, gp->rpc); } + + touch_nmi_watchdog(); } memset(global_cpu_snapshot, 0, sizeof(global_cpu_snapshot)); @@ -355,6 +357,8 @@ static void pmu_snapshot_all_cpus(void) (cpu == this_cpu ? '*' : ' '), cpu, pp->pcr[0], pp->pcr[1], pp->pcr[2], pp->pcr[3], pp->pic[0], pp->pic[1], pp->pic[2], pp->pic[3]); + + touch_nmi_watchdog(); } memset(global_cpu_snapshot, 0, sizeof(global_cpu_snapshot)); |