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| author | Andi Kleen <ak@suse.de> | 2005-05-16 21:53:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-17 07:59:12 -0700 |
| commit | ac6b931c44fd9988eaa821c339d54ba06b212412 (patch) | |
| tree | 3f3c1abe2e53ced6c73c226767faf6fd8d78b2e6 /arch/x86_64/kernel/nmi.c | |
| parent | 7179906293ebdc333f14a03d3e58b03604848f3c (diff) | |
| download | op-kernel-dev-ac6b931c44fd9988eaa821c339d54ba06b212412.zip op-kernel-dev-ac6b931c44fd9988eaa821c339d54ba06b212412.tar.gz | |
[PATCH] x86_64: Reduce NMI watchdog stack usage
NR_CPUs can be quite big these days. kmalloc the per CPU array instead of
putting it onto the stack
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/nmi.c')
| -rw-r--r-- | arch/x86_64/kernel/nmi.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/nmi.c b/arch/x86_64/kernel/nmi.c index 61de0b3..ec13eb9 100644 --- a/arch/x86_64/kernel/nmi.c +++ b/arch/x86_64/kernel/nmi.c @@ -114,7 +114,7 @@ static __init int cpu_has_lapic(void) static int __init check_nmi_watchdog (void) { - int counts[NR_CPUS]; + int *counts; int cpu; if (nmi_watchdog == NMI_NONE) @@ -125,6 +125,12 @@ static int __init check_nmi_watchdog (void) return -1; } + counts = kmalloc(NR_CPUS * sizeof(int),GFP_KERNEL); + if (!counts) { + nmi_watchdog = NMI_NONE; + return 0; + } + printk(KERN_INFO "Testing NMI watchdog ... "); for (cpu = 0; cpu < NR_CPUS; cpu++) @@ -139,6 +145,7 @@ static int __init check_nmi_watchdog (void) cpu_pda[cpu].__nmi_count); nmi_active = 0; lapic_nmi_owner &= ~LAPIC_NMI_WATCHDOG; + kfree(counts); return -1; } } @@ -149,6 +156,7 @@ static int __init check_nmi_watchdog (void) if (nmi_watchdog == NMI_LOCAL_APIC) nmi_hz = 1; + kfree(counts); return 0; } /* Have this called later during boot so counters are updating */ |
