Commit a90afe8d authored by Robin H. Johnson's avatar Robin H. Johnson Committed by Steven Rostedt (VMware)

tracing: Show size of requested perf buffer

If the perf buffer isn't large enough, provide a hint about how large it
needs to be for whatever is running.

Link: https://lkml.kernel.org/r/20210831043723.13481-1-robbat2@gentoo.orgSigned-off-by: default avatarRobin H. Johnson <robbat2@gentoo.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 39d9c1c1
...@@ -400,7 +400,8 @@ void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp) ...@@ -400,7 +400,8 @@ void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp)
BUILD_BUG_ON(PERF_MAX_TRACE_SIZE % sizeof(unsigned long)); BUILD_BUG_ON(PERF_MAX_TRACE_SIZE % sizeof(unsigned long));
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"perf buffer not large enough")) "perf buffer not large enough, wanted %d, have %d",
size, PERF_MAX_TRACE_SIZE))
return NULL; return NULL;
*rctxp = rctx = perf_swevent_get_recursion_context(); *rctxp = rctx = perf_swevent_get_recursion_context();
......
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