Messages in this thread Patch in this message | | | Date | Mon, 28 Apr 2008 11:17:48 -0700 | From | Hiroshi Shimamoto <> | Subject | [PATCH -rt 3/4] x86: nmi_watchdog NMI needed for irq_show_regs_callback() |
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From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
The -rt kernel doesn't panic immediately when NMI lockup detected. Because the kernel waits show_regs on all cpus, but NMI is not come so frequently.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> --- arch/x86/kernel/nmi_32.c | 7 +++++++ arch/x86/kernel/nmi_64.c | 8 +++++++- 2 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/nmi_32.c b/arch/x86/kernel/nmi_32.c index f55f05b..da9deb3 100644 --- a/arch/x86/kernel/nmi_32.c +++ b/arch/x86/kernel/nmi_32.c @@ -428,6 +428,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason) if (i == cpu) continue; nmi_show_regs[i] = 1; + } + + smp_send_nmi_allbutself(); + + for_each_online_cpu(i) { + if (i == cpu) + continue; while (nmi_show_regs[i] == 1) cpu_relax(); } diff --git a/arch/x86/kernel/nmi_64.c b/arch/x86/kernel/nmi_64.c index 69cc737..5d3073c 100644 --- a/arch/x86/kernel/nmi_64.c +++ b/arch/x86/kernel/nmi_64.c @@ -412,10 +412,16 @@ nmi_watchdog_tick(struct pt_regs * regs, unsigned reason) if (i == cpu) continue; nmi_show_regs[i] = 1; + } + + smp_send_nmi_allbutself(); + + for_each_online_cpu(i) { + if (i == cpu) + continue; while (nmi_show_regs[i] == 1) cpu_relax(); } - die_nmi("NMI Watchdog detected LOCKUP on CPU %d\n", regs, panic_on_timeout); } -- 1.5.4.1
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