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authorWang Nan <wangnan0@huawei.com>2016-07-14 11:34:37 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-07-15 23:27:47 +0300
commit4876075b3205af992bf1012f6d6fbc03593d55b9 (patch)
treed60d7f96f09b697c6dc7dad009dec1b29df57648 /tools/perf/util/evlist.c
parenta4ea0ec4f24a721bea5447a27ad5fbcb89275bae (diff)
downloadlinux-4876075b3205af992bf1012f6d6fbc03593d55b9.tar.xz
perf evlist: Record mmap cookie into fdarray private field
Insetad of saving a index into fdarray entries private field, save the corresponding 'struct perf_mmap' pointer, and release them directly using perf_mmap__put(). Following commits introduce multiple mmap arrays to evlist. Without this patch, perf_evlist__munmap_filtered() is unable to retrive correct 'struct perf_mmap' pointer. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: He Kuang <hekuang@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1468485287-33422-6-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.c')
-rw-r--r--tools/perf/util/evlist.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a4137e02eab8..1462085a8618 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -30,6 +30,7 @@
static void perf_evlist__mmap_put(struct perf_evlist *evlist, int idx);
static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx);
static void perf_mmap__munmap(struct perf_mmap *map);
+static void perf_mmap__put(struct perf_mmap *map);
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
@@ -466,7 +467,8 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
return 0;
}
-static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx, short revent)
+static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
+ struct perf_mmap *map, short revent)
{
int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP);
/*
@@ -474,7 +476,7 @@ static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx
* close the associated evlist->mmap[] entry.
*/
if (pos >= 0) {
- evlist->pollfd.priv[pos].idx = idx;
+ evlist->pollfd.priv[pos].ptr = map;
fcntl(fd, F_SETFL, O_NONBLOCK);
}
@@ -484,15 +486,16 @@ static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, int idx
int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
{
- return __perf_evlist__add_pollfd(evlist, fd, -1, POLLIN);
+ return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN);
}
static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
void *arg __maybe_unused)
{
- struct perf_evlist *evlist = container_of(fda, struct perf_evlist, pollfd);
+ struct perf_mmap *map = fda->priv[fd].ptr;
- perf_evlist__mmap_put(evlist, fda->priv[fd].idx);
+ if (map)
+ perf_mmap__put(map);
}
int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
@@ -1098,7 +1101,7 @@ static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx,
* Therefore don't add it for polling.
*/
if (!evsel->system_wide &&
- __perf_evlist__add_pollfd(evlist, fd, idx, revent) < 0) {
+ __perf_evlist__add_pollfd(evlist, fd, &evlist->mmap[idx], revent) < 0) {
perf_evlist__mmap_put(evlist, idx);
return -1;
}