From c9c53ca03d6f97fdd9832d5ed3f15b30ee5cdb86 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Thu, 27 Jan 2011 22:42:43 -0500 Subject: tracing/filter: Dynamically allocate preds For every filter that is made, we create predicates to hold every operation within the filter. We have a max of 32 predicates that we can hold. Currently, we allocate all 32 even if we only need to use one. Part of the reason we do this is that the filter can be used at any moment by any event. Fortunately, the filter is only used with preemption disabled. By reseting the count of preds used "n_preds" to zero, then performing a synchronize_sched(), we can safely free and reallocate a new array of preds. Cc: Tom Zanussi Signed-off-by: Steven Rostedt --- kernel/trace/trace.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'kernel/trace/trace.h') diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 1597bc0749c..441fc1bc85d 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -661,7 +661,8 @@ struct ftrace_event_field { }; struct event_filter { - int n_preds; + int n_preds; /* Number assigned */ + int a_preds; /* allocated */ struct filter_pred **preds; char *filter_string; }; -- cgit v1.2.3-18-g5258