diff options
| author |   Steven Rostedt <srostedt@redhat.com> | 2009-09-03 19:53:46 -0400 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2009-09-04 11:46:25 -0400 |
| commit | 077c5407cd3231cf13472623995f0dfdda510d62 (patch) | |
| tree | 843c729463363495f13333b2b55f3985ea75dfd8 /kernel | |
| parent | ring-buffer: do not count discarded events (diff) | |
| download | linux-dev-077c5407cd3231cf13472623995f0dfdda510d62.tar.xz linux-dev-077c5407cd3231cf13472623995f0dfdda510d62.zip | |
ring-buffer: disable all cpu buffers when one finds a problem
Currently the way RB_WARN_ON works, is to disable either the current
CPU buffer or all CPU buffers, depending on whether a ring_buffer or
ring_buffer_per_cpu struct was passed into the macro.
Most users of the RB_WARN_ON pass in the CPU buffer, so only the one
CPU buffer gets disabled but the rest are still active. This may
confuse users even though a warning is sent to the console.
This patch changes the macro to disable the entire buffer even if
the CPU buffer is passed in.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index c8d2a66e1d1f..f83a42a79ee8 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -467,14 +467,19 @@ struct ring_buffer_iter { }; /* buffer may be either ring_buffer or ring_buffer_per_cpu */ -#define RB_WARN_ON(buffer, cond) \ - ({ \ - int _____ret = unlikely(cond); \ - if (_____ret) { \ - atomic_inc(&buffer->record_disabled); \ - WARN_ON(1); \ - } \ - _____ret; \ +#define RB_WARN_ON(b, cond) \ + ({ \ + int _____ret = unlikely(cond); \ + if (_____ret) { \ + if (__same_type(*(b), struct ring_buffer_per_cpu)) { \ + struct ring_buffer_per_cpu *__b = \ + (void *)b; \ + atomic_inc(&__b->buffer->record_disabled); \ + } else \ + atomic_inc(&b->record_disabled); \ + WARN_ON(1); \ + } \ + _____ret; \ }) /* Up this if you want to test the TIME_EXTENTS and normalization */ |