diff options
| author | Valentin Schneider <[email protected]> | 2023-03-07 14:35:56 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2023-03-24 11:01:28 +0100 |
| commit | 4c8c3c7f70a6779d30f5492acbc9978f4636fe7a (patch) | |
| tree | 96db2ecffefa39802d9b5d59d4eb5f6084beb04e /include/linux | |
| parent | 4468161a5ca2ea239c92de7c0a0dca61854ec4da (diff) | |
treewide: Trace IPIs sent via smp_send_reschedule()
To be able to trace invocations of smp_send_reschedule(), rename the
arch-specific definitions of it to arch_smp_send_reschedule() and wrap it
into an smp_send_reschedule() that contains a tracepoint.
Changes to include the declaration of the tracepoint were driven by the
following coccinelle script:
@func_use@
@@
smp_send_reschedule(...);
@include@
@@
#include <trace/events/ipi.h>
@no_include depends on func_use && !include@
@@
#include <...>
+
+ #include <trace/events/ipi.h>
[csky bits]
[riscv bits]
Signed-off-by: Valentin Schneider <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Guo Ren <[email protected]>
Acked-by: Palmer Dabbelt <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/smp.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/smp.h b/include/linux/smp.h index a80ab58ae3f1..c036a2228d8d 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -125,8 +125,15 @@ extern void smp_send_stop(void); /* * sends a 'reschedule' event to another CPU: */ -extern void smp_send_reschedule(int cpu); - +extern void arch_smp_send_reschedule(int cpu); +/* + * scheduler_ipi() is inline so can't be passed as callback reason, but the + * callsite IP should be sufficient for root-causing IPIs sent from here. + */ +#define smp_send_reschedule(cpu) ({ \ + trace_ipi_send_cpumask(cpumask_of(cpu), _RET_IP_, NULL); \ + arch_smp_send_reschedule(cpu); \ +}) /* * Prepare machine for booting other CPUs. |