Steven Rostedt
3554228d42
ring-buffer: only warn on wrap if buffer is bigger than two pages ...
On boot up, to save memory, ftrace allocates the minimum buffer
which is two pages. Ftrace also goes through a series of tests
(when configured) on boot up. These tests can fill up a page within
a single interrupt.
The ring buffer also has a WARN_ON when it detects that the buffer was
completely filled within a single commit (other commits are allowed to
be nested).
Combine the small buffer on start up, with the tests that can fill more
than a single page within an interrupt, this can trigger the WARN_ON.
This patch makes the WARN_ON only happen when the ring buffer consists
of more than two pages.
[ Impact: prevent false WARN_ON in ftrace startup tests ]
Reported-by: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20090421094616.GA14561@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21 16:00:45 +02:00
blktrace: fix context-info when mixed-using blk tracer and trace events
2009-04-16 10:11:01 +02:00
ftrace: use module notifier for function tracer
2009-04-17 16:59:15 +02:00
tracing: rename EVENT_TRACER config to ENABLE_EVENT_TRACING
2009-04-20 17:55:35 +02:00
tracing/filters: use ring_buffer_discard_commit() in filter_check_discard()
2009-04-14 00:00:56 +02:00
tracing/events: move the ftrace event tracing code to core
2009-04-14 12:57:59 -04:00
ring-buffer: only warn on wrap if buffer is bigger than two pages
2009-04-21 16:00:45 +02:00
tracing: protect trace_printk from recursion
2009-04-17 16:21:35 -04:00
tracing/filters: add filter_mutex to protect filter predicates
2009-04-17 18:28:27 +02:00
tracing: use macros to denote usec and nsec per second
2009-04-07 14:43:06 +02:00
tracing/filters: use ring_buffer_discard_commit() in filter_check_discard()
2009-04-14 00:00:56 +02:00
tracing: fix four sparse warnings
2009-03-22 18:16:54 +01:00
tracing/events: convert event call sites to use a link list
2009-04-14 12:58:00 -04:00
tracing/filters: add TRACE_EVENT_FORMAT_NOFILTER event macro
2009-04-14 00:00:51 +02:00
tracing/filters: don't remove old filters when failed to write subsys->filter
2009-04-21 11:58:27 +02:00
tracing/filters: allow user-input to be integer-like string
2009-04-21 11:58:28 +02:00
tracing/filters: allow on-the-fly filter switching
2009-04-14 00:03:55 +02:00
tracing/core: use appropriate waiting on trace_pipe
2009-02-18 01:40:20 +01:00
function-graph: add option to calculate graph time or not
2009-03-24 23:41:11 -04:00
tracing/filters: use ring_buffer_discard_commit() in filter_check_discard()
2009-04-14 00:00:56 +02:00
tracing: have latency tracers set the latency format
2009-03-04 22:15:30 -05:00
tracing: use macros to denote usec and nsec per second
2009-04-07 14:43:06 +02:00
tracing/ftrace: make nop-tracer use polling wait for events on pipe
2009-03-23 09:22:15 +01:00
tracing/events: add export symbols for trace events in modules
2009-04-14 12:58:01 -04:00
tracing/events: move declarations from trace directory to core include
2009-04-14 12:57:58 -04:00
tracing/filters: use ring_buffer_discard_commit() in filter_check_discard()
2009-04-14 00:00:56 +02:00
tracing/ftrace: factorize the tracing files creation
2009-04-07 14:43:07 +02:00
tracing/events: move trace point headers into include/trace/events
2009-04-14 22:05:43 -04:00
tracing/events: move trace point headers into include/trace/events
2009-04-14 22:05:43 -04:00
tracing: keep the tracing buffer after self-test failure
2009-03-22 15:17:21 +01:00
tracing/ftrace: factorize the tracing files creation
2009-04-07 14:43:07 +02:00
Merge branch 'linus' into tracing/core
2009-04-07 13:47:45 +02:00
tracing: add handler to trace_stat
2009-03-24 23:22:58 -04:00
tracing/syscalls: use a dedicated file header
2009-04-09 05:43:32 +02:00
tracing/ftrace: factorize the tracing files creation
2009-04-07 14:43:07 +02:00
Merge branch 'linus' into tracing/core
2009-04-07 13:47:45 +02:00
3554228d42