On Tue, 2007-09-11 at 13:16 -0600, David Bahi wrote: > sorry to pull your work in to this thread wrongly Daniel. my point was > really that the 23-rc4 kernel does not experience either failure for me > and that the current work being done for nmi_watchdog is unrelated so > this still needs attention. No big deal.. you could try 2.6.23-rc6 if your inclined too. > no hang with nmi_watchdog=2 in 23-rc4 (non -rt) > no hang with nmi_watchdog=2 in 23-rc4-rt1 I guess I'm confused what's happening .. It sounds like with nmi_watchdog=1 , the system hangs and the watchdog catches it. With nmi_watchdog=2 the system doesn't hang, and the watchdog doesn't catch anything (assuming it's working)? > finally, i didn't try nmi_watchdog=2 earlier because the > Documentation/nmi_watchdog.txt file says it's not a useful setting for > x86_64. quote: > > For x86-64, the needed APIC is always compiled in, and the NMI > watchdog is always enabled with I/O-APIC mode (nmi_watchdog=1). > Currently, local APIC mode (nmi_watchdog=2) does not work on x86-64. > > Is this no longer true? My experience with nmi_watchdog=2 and this LTP > openposix sched_yeild 1-1.test is that this test hardlocks the host and > that no watchdog is triggered with this setting. It looks like it should work .. I'd be surprised if it didn't work.. You can check if it's ticking in /proc/interrupts under NMI (it stops when the system is idle tho) Daniel - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
