Commit-ID: bf93f9ed3a2cb89eb7e58851139d3be375b98027
Gitweb: http://git.kernel.org/tip/bf93f9ed3a2cb89eb7e58851139d3be375b98027
Author: Steven Rostedt <srostedt@xxxxxxxxxx>
AuthorDate: Thu, 27 Jan 2011 23:21:34 -0500
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Mon, 7 Feb 2011 20:56:20 -0500
tracing/filter: Increase the max preds to 2^14
Now that the filter logic does not require to save the pred results
on the stack, we can increase the max number of preds we allow.
As the preds are index by a short value, and we use the MSBs as flags
we can increase the max preds to 2^14 (16384) which should be way
more than enough.
Cc: Tom Zanussi <tzanussi@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace.h | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index fbff872..856e73c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -680,7 +680,14 @@ struct event_subsystem {
#define FILTER_PRED_IS_RIGHT (1 << 15)
#define FILTER_PRED_FOLD (1 << 15)
-#define MAX_FILTER_PRED 32
+/*
+ * The max preds is the size of unsigned short with
+ * two flags at the MSBs. One bit is used for both the IS_RIGHT
+ * and FOLD flags. The other is reserved.
+ *
+ * 2^14 preds is way more than enough.
+ */
+#define MAX_FILTER_PRED 16384
struct filter_pred;
struct regex;
--
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