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authorIngo Molnar <mingo@elte.hu>2008-05-12 15:43:53 +0200
committerIngo Molnar <mingo@elte.hu>2008-05-30 14:15:02 +0200
commit02ff375590ac4140d88afc76505df1ad45c6af59 (patch)
tree6c24cfb6d0e652f691325dc63afab1373b808442 /drivers/edac/mpc85xx_edac.c
parent1c4cd6dd1d0fd3057bb6b8c87460049497889d1b (diff)
softlockup: fix false positives on nohz if CPU is 100% idle for more than 60 seconds
Fix (probably theoretical only) rq->clock update bug: in tick_nohz_update_jiffies() [which is called on all irq entry on all cpus where the irq entry hits an idle cpu] we call touch_softlockup_watchdog() before we update jiffies. That works fine most of the time when idle timeouts are within 60 seconds. But when an idle timeout is beyond 60 seconds, jiffies is updated with a jump of more than 60 seconds, which causes a jump in cpu-clock of more than 60 seconds, triggering a false positive. Reported-by: David Miller <davem@davemloft.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/edac/mpc85xx_edac.c')
0 files changed, 0 insertions, 0 deletions