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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>
This commit is contained in:
Wang Nan 2016-07-14 08:34:37 +00:00 committed by Arnaldo Carvalho de Melo
parent a4ea0ec4f2
commit 4876075b32
1 changed files with 9 additions and 6 deletions
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15
tools/perf/util/evlist.c
View File

@ -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;
}