From: Namhyung Kim <[email protected]> It seems that function profiler's hash size is fixed at 1024. Make the ftrace_profile_bits const and update hash size macro.
Signed-off-by: Namhyung Kim <[email protected]> --- kernel/trace/ftrace.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index d38ad7145f2f..08bbc5952a3a 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -486,7 +486,6 @@ struct ftrace_profile_stat { #define PROFILES_PER_PAGE \ (PROFILE_RECORDS_SIZE / sizeof(struct ftrace_profile)) -static int ftrace_profile_bits __read_mostly; static int ftrace_profile_enabled __read_mostly; /* ftrace_profile_lock - synchronize the enable and disable of the profiler */ @@ -494,7 +493,10 @@ static DEFINE_MUTEX(ftrace_profile_lock); static DEFINE_PER_CPU(struct ftrace_profile_stat, ftrace_profile_stats); -#define FTRACE_PROFILE_HASH_SIZE 1024 /* must be power of 2 */ +#define FTRACE_PROFILE_HASH_BITS 10 +#define FTRACE_PROFILE_HASH_SIZE (1 << FTRACE_PROFILE_HASH_BITS) + +static const int ftrace_profile_bits = FTRACE_PROFILE_HASH_BITS; static void * function_stat_next(void *v, int idx) @@ -724,13 +726,6 @@ static int ftrace_profile_init_cpu(int cpu) if (!stat->hash) return -ENOMEM; - if (!ftrace_profile_bits) { - size--; - - for (; size; size >>= 1) - ftrace_profile_bits++; - } - /* Preallocate the function profiling pages */ if (ftrace_profile_pages_init(stat) < 0) { kfree(stat->hash); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
