lmkd: Skip memory.stat usage when per-app memcgs are not used
Initial change to remove memory.stat usage when per-application memcgs
are disabled was partially merged into AOSP under the following id:
Ib6dd7586d3ef1c64cb04d16e2d2b21fa9c8e6a3a
This change adds the missing parts.
Bug: 110384555
Change-Id: I1265021b1ede0e68efbf80d6430a959eaf46a69a
Merged-In: Ib6dd7586d3ef1c64cb04d16e2d2b21fa9c8e6a3a
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index a14d0e5..3b45db7 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -755,24 +755,31 @@
}
static int memory_stat_parse(struct memory_stat *mem_st, int pid, uid_t uid) {
- FILE *fp;
- char buf[PATH_MAX];
+ FILE *fp;
+ char buf[PATH_MAX];
- snprintf(buf, sizeof(buf), MEMCG_PROCESS_MEMORY_STAT_PATH, uid, pid);
+ /*
+ * Per-application memory.stat files are available only when
+ * per-application memcgs are enabled.
+ */
+ if (!per_app_memcg)
+ return -1;
- fp = fopen(buf, "r");
+ snprintf(buf, sizeof(buf), MEMCG_PROCESS_MEMORY_STAT_PATH, uid, pid);
- if (fp == NULL) {
- ALOGE("%s open failed: %s", buf, strerror(errno));
- return -1;
- }
+ fp = fopen(buf, "r");
- while (fgets(buf, PAGE_SIZE, fp) != NULL ) {
- memory_stat_parse_line(buf, mem_st);
- }
- fclose(fp);
+ if (fp == NULL) {
+ ALOGE("%s open failed: %s", buf, strerror(errno));
+ return -1;
+ }
- return 0;
+ while (fgets(buf, PAGE_SIZE, fp) != NULL ) {
+ memory_stat_parse_line(buf, mem_st);
+ }
+ fclose(fp);
+
+ return 0;
}
#endif