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Date: Thu, 5 Jul 2018 01:15:53 +0300
From: Yury Norov <ynorov@...iumnetworks.com>
To: Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Kate Stewart <kstewart@...uxfoundation.org>,
Matthew Wilcox <willy@...radead.org>,
Philippe Ombredanne <pombredanne@...b.com>,
David Ahern <dsahern@...il.com>,
David Carrillo-Cisneros <davidcc@...gle.com>,
Andi Kleen <ak@...ux.intel.com>,
Jin Yao <yao.jin@...ux.intel.com>, linux-kernel@...r.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Mike Snitzer <snitzer@...hat.com>,
Yury Norov <ynorov@...iumnetworks.com>
Subject: Re: [PATCH v2 2/2] bitmap: sync tools with new bitmap allocation API
On top of next-20180622 and Andy Shevchenko series:
https://lkml.org/lkml/2018/6/18/841
The series https://lkml.org/lkml/2018/6/18/841 introduces helpers for
bitmap allocation. tools/ has its own bitmap_alloc() which differs from
bitmap_alloc() proposed in new kernel API, and is equivalent to
bitmap_zalloc().
In this patch tools is switched to equivalent API. Some bitmap_zalloc()s
are not paired with corresponding bitmap_free()s, so marked with FIXME tag.
Since v1:
- removed flags parameter;
- removed RFC tag: this is real bug where free() is not called;
- FIXME notes added where needed.
Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>
---
tools/include/linux/bitmap.h | 17 +++++++++++++----
tools/perf/builtin-c2c.c | 11 ++++++-----
tools/perf/tests/bitmap.c | 4 ++--
tools/perf/tests/mem2node.c | 4 ++--
tools/perf/util/header.c | 8 +++++---
5 files changed, 28 insertions(+), 16 deletions(-)
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 48c208437bbd..64a87921bac8 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h
@@ -98,12 +98,21 @@ static inline int test_and_set_bit(int nr, unsigned long *addr)
}
/**
- * bitmap_alloc - Allocate bitmap
- * @nbits: Number of bits
+ * Allocation and deallocation of bitmap.
*/
-static inline unsigned long *bitmap_alloc(int nbits)
+static inline unsigned long *bitmap_alloc(unsigned int nbits)
{
- return calloc(1, BITS_TO_LONGS(nbits) * sizeof(unsigned long));
+ return malloc(BITS_TO_LONGS(nbits) * sizeof(unsigned long));
+}
+
+static inline unsigned long *bitmap_zalloc(unsigned int nbits)
+{
+ return calloc(BITS_TO_LONGS(nbits), sizeof(unsigned long));
+}
+
+static inline void bitmap_free(const unsigned long *bitmap)
+{
+ free((unsigned long *)bitmap);
}
/*
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 6a8738f7ead3..584abe437154 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -127,11 +127,11 @@ static void *c2c_he_zalloc(size_t size)
if (!c2c_he)
return NULL;
- c2c_he->cpuset = bitmap_alloc(c2c.cpus_cnt);
+ c2c_he->cpuset = bitmap_zalloc(c2c.cpus_cnt);
if (!c2c_he->cpuset)
return NULL;
- c2c_he->nodeset = bitmap_alloc(c2c.nodes_cnt);
+ c2c_he->nodeset = bitmap_zalloc(c2c.nodes_cnt);
if (!c2c_he->nodeset)
return NULL;
@@ -156,8 +156,8 @@ static void c2c_he_free(void *he)
free(c2c_he->hists);
}
- free(c2c_he->cpuset);
- free(c2c_he->nodeset);
+ bitmap_free(c2c_he->cpuset);
+ bitmap_free(c2c_he->nodeset);
free(c2c_he->nodestr);
free(c2c_he->node_stats);
free(c2c_he);
@@ -2051,7 +2051,8 @@ static int setup_nodes(struct perf_session *session)
struct cpu_map *map = n[node].map;
unsigned long *set;
- set = bitmap_alloc(c2c.cpus_cnt);
+ /* FIXME: No counterpart free() */
+ set = bitmap_zalloc(c2c.cpus_cnt);
if (!set)
return -ENOMEM;
diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 96e7fc1ad3f9..0f7491a4e0f2 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -13,7 +13,7 @@ static unsigned long *get_bitmap(const char *str, int nbits)
unsigned long *bm = NULL;
int i;
- bm = bitmap_alloc(nbits);
+ bm = bitmap_zalloc(nbits);
if (map && bm) {
for (i = 0; i < map->nr; i++)
@@ -35,7 +35,7 @@ static int test_bitmap(const char *str)
pr_debug("bitmap: %s\n", buf);
ret = !strcmp(buf, str);
- free(bm);
+ bitmap_free(bm);
return ret;
}
diff --git a/tools/perf/tests/mem2node.c b/tools/perf/tests/mem2node.c
index d8e3d49d3638..27fd83bab453 100644
--- a/tools/perf/tests/mem2node.c
+++ b/tools/perf/tests/mem2node.c
@@ -21,7 +21,7 @@ static unsigned long *get_bitmap(const char *str, int nbits)
unsigned long *bm = NULL;
int i;
- bm = bitmap_alloc(nbits);
+ bm = bitmap_zalloc(nbits);
if (map && bm) {
for (i = 0; i < map->nr; i++)
@@ -65,7 +65,7 @@ int test__mem2node(struct test *t __maybe_unused, int subtest __maybe_unused)
T("failed: mem2node__node", -1 == mem2node__node(&map, 0x1050));
for (i = 0; i < ARRAY_SIZE(nodes); i++)
- free(nodes[i].set);
+ bitmap_free(nodes[i].set);
mem2node__exit(&map);
return 0;
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 3a6bec22baa3..8736c70ffb51 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -275,7 +275,8 @@ static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
if (ret)
return ret;
- set = bitmap_alloc(size);
+ /* FIXME: No counterpart free() */
+ set = bitmap_zalloc(size);
if (!set)
return -ENOMEM;
@@ -284,7 +285,7 @@ static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
ret = do_read_u64(ff, p + i);
if (ret < 0) {
- free(set);
+ bitmap_free(set);
return ret;
}
}
@@ -1277,7 +1278,8 @@ static int memory_node__read(struct memory_node *n, unsigned long idx)
size++;
- n->set = bitmap_alloc(size);
+ /* FIXME: No counterpart free() */
+ n->set = bitmap_zalloc(size);
if (!n->set) {
closedir(dir);
return -ENOMEM;
--
2.17.1
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