From: Arnaldo Carvalho de Melo <[email protected]> When testing system wide tracing without filtering the syscalls called by 'perf trace' itself we get into a feedback loop, drop for now those two syscalls, that are the ones that 'perf trace' does in its loop for writing the syscalls it intercepts, to help with testing till we get that filtering in place.
Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/examples/bpf/augmented_raw_syscalls.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c index ec109c12ff24..7d729319618c 100644 --- a/tools/perf/examples/bpf/augmented_raw_syscalls.c +++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c @@ -43,7 +43,9 @@ struct augmented_filename { char value[256]; }; +#define SYS_WRITE 1 #define SYS_OPEN 2 +#define SYS_POLL 7 #define SYS_OPENAT 257 SEC("raw_syscalls:sys_enter") @@ -101,6 +103,8 @@ int sys_enter(struct syscall_enter_args *args) * after the ctx memory access to prevent their down stream merging. */ switch (augmented_args.args.syscall_nr) { + case SYS_WRITE: + case SYS_POLL: return 0; case SYS_OPEN: filename_arg = (const void *)args->args[0]; __asm__ __volatile__("": : :"memory"); break; -- 2.14.5
