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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-11-24 16:56:58 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-26 10:55:38 +0100 |
| commit | ba005e1f417295d28cd1563ab82bc33af07fb16a (patch) | |
| tree | d771659edc46c1bd5467578a6616657c8cf26db5 /kernel/signal.c | |
| parent | f9d4257e01d266e67420cc99d456b6d4c8464f54 (diff) | |
| download | blackbird-op-linux-ba005e1f417295d28cd1563ab82bc33af07fb16a.tar.gz blackbird-op-linux-ba005e1f417295d28cd1563ab82bc33af07fb16a.zip | |
tracepoint: Add signal loss events
Add signal_overflow_fail and signal_lose_info tracepoints
for signal-lost events.
Changes in v3:
- Add docbook style comments
Changes in v2:
- Use siginfo string macro
Suggested-by: Roland McGrath <roland@redhat.com>
Reviewed-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Oleg Nesterov <oleg@redhat.com>
LKML-Reference: <20091124215658.30449.9934.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 349d44937406..93e72e5feae6 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -897,12 +897,21 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, break; } } else if (!is_si_special(info)) { - if (sig >= SIGRTMIN && info->si_code != SI_USER) - /* - * Queue overflow, abort. We may abort if the signal was rt - * and sent by user using something other than kill(). - */ + if (sig >= SIGRTMIN && info->si_code != SI_USER) { + /* + * Queue overflow, abort. We may abort if the + * signal was rt and sent by user using something + * other than kill(). + */ + trace_signal_overflow_fail(sig, group, info); return -EAGAIN; + } else { + /* + * This is a silent loss of information. We still + * send the signal, but the *info bits are lost. + */ + trace_signal_lose_info(sig, group, info); + } } out_set: |
