[PATCH v5 1/4] nmi_backtrace: add more trigger_*_cpu_backtrace() methods
atomlin at redhat.com
Thu Apr 14 08:17:05 PDT 2016
On Tue 2016-04-05 13:26 -0400, Chris Metcalf wrote:
> Currently you can only request a backtrace of either all cpus, or
> all cpus but yourself. It can also be helpful to request a remote
> backtrace of a single cpu, and since we want that, the logical
> extension is to support a cpumask as the underlying primitive.
> This change modifies the existing lib/nmi_backtrace.c code to take
> a cpumask as its basic primitive, and modifies the linux/nmi.h code
> to use either the old "all/all_but_self" arch methods, or the new
> "cpumask" method, depending on which is available.
> The existing clients of nmi_backtrace (arm and x86) are converted
> to using the new cpumask approach in this change.
> Signed-off-by: Chris Metcalf <cmetcalf at mellanox.com>
> arch/arm/include/asm/irq.h | 4 +--
> arch/arm/kernel/smp.c | 4 +--
> arch/x86/include/asm/irq.h | 4 +--
> arch/x86/kernel/apic/hw_nmi.c | 6 ++---
> include/linux/nmi.h | 63 ++++++++++++++++++++++++++++++++++---------
> lib/nmi_backtrace.c | 15 +++++------
> 6 files changed, 65 insertions(+), 31 deletions(-)
Looks good to me.
Reviewed-by: Aaron Tomlin <atomlin at redhat.com>
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