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Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r--kernel/trace/ftrace.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index f9456346ec66..d2d488c43a6a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2991,6 +2991,8 @@ static void ftrace_shutdown_sysctl(void)
static u64 ftrace_update_time;
unsigned long ftrace_update_tot_cnt;
+unsigned long ftrace_number_of_pages;
+unsigned long ftrace_number_of_groups;
static inline int ops_traces_mod(struct ftrace_ops *ops)
{
@@ -3115,6 +3117,9 @@ static int ftrace_allocate_records(struct ftrace_page *pg, int count)
goto again;
}
+ ftrace_number_of_pages += 1 << order;
+ ftrace_number_of_groups++;
+
cnt = (PAGE_SIZE << order) / ENTRY_SIZE;
pg->size = cnt;
@@ -3170,6 +3175,8 @@ ftrace_allocate_pages(unsigned long num_to_init)
start_pg = pg->next;
kfree(pg);
pg = start_pg;
+ ftrace_number_of_pages -= 1 << order;
+ ftrace_number_of_groups--;
}
pr_info("ftrace: FAILED to allocate memory for functions\n");
return NULL;
@@ -6173,6 +6180,8 @@ void ftrace_release_mod(struct module *mod)
free_pages((unsigned long)pg->records, order);
tmp_page = pg->next;
kfree(pg);
+ ftrace_number_of_pages -= 1 << order;
+ ftrace_number_of_groups--;
}
}
@@ -6514,6 +6523,8 @@ void ftrace_free_mem(struct module *mod, void *start_ptr, void *end_ptr)
*last_pg = pg->next;
order = get_count_order(pg->size / ENTRIES_PER_PAGE);
free_pages((unsigned long)pg->records, order);
+ ftrace_number_of_pages -= 1 << order;
+ ftrace_number_of_groups--;
kfree(pg);
pg = container_of(last_pg, struct ftrace_page, next);
if (!(*last_pg))
@@ -6569,6 +6580,9 @@ void __init ftrace_init(void)
__start_mcount_loc,
__stop_mcount_loc);
+ pr_info("ftrace: allocated %ld pages with %ld groups\n",
+ ftrace_number_of_pages, ftrace_number_of_groups);
+
set_ftrace_early_filters();
return;