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authorMinchan Kim <minchan@kernel.org>2016-07-27 01:24:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-27 02:19:19 +0300
commit91537fee001361b1a4d485f1af65d8efa03d49b5 (patch)
treebbfbe678ebbcdec6dc05de246970712cfdd653ba
parent8ea1d2a1985a7ae096edf5850a31d844ad1b8e97 (diff)
downloadlinux-91537fee001361b1a4d485f1af65d8efa03d49b5.tar.xz
mm: add NR_ZSMALLOC to vmstat
zram is very popular for some of the embedded world (e.g., TV, mobile phones). On those system, zsmalloc's consumed memory size is never trivial (one of example from real product system, total memory: 800M, zsmalloc consumed: 150M), so we have used this out of tree patch to monitor system memory behavior via /proc/vmstat. With zsmalloc in vmstat, it helps in tracking down system behavior due to memory usage. [minchan@kernel.org: zsmalloc: follow up zsmalloc vmstat] Link: http://lkml.kernel.org/r/20160607091737.GC23435@bbox [akpm@linux-foundation.org: fix build with CONFIG_ZSMALLOC=m] Link: http://lkml.kernel.org/r/1464919731-13255-1-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Sangseok Lee <sangseok.lee@lge.com> Cc: Chanho Min <chanho.min@lge.com> Cc: Chan Gyun Jeong <chan.jeong@lge.com> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mmzone.h3
-rw-r--r--mm/vmstat.c4
-rw-r--r--mm/zsmalloc.c7
3 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 3388ccbab7d6..3d7ab30d4940 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -140,6 +140,9 @@ enum zone_stat_item {
NR_DIRTIED, /* page dirtyings since bootup */
NR_WRITTEN, /* page writings since bootup */
NR_PAGES_SCANNED, /* pages scanned since last reclaim */
+#if IS_ENABLED(CONFIG_ZSMALLOC)
+ NR_ZSPAGES, /* allocated in zsmalloc */
+#endif
#ifdef CONFIG_NUMA
NUMA_HIT, /* allocated in intended node */
NUMA_MISS, /* allocated in non intended node */
diff --git a/mm/vmstat.c b/mm/vmstat.c
index cb2a67bb4158..2a0f26bdae39 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -718,7 +718,9 @@ const char * const vmstat_text[] = {
"nr_dirtied",
"nr_written",
"nr_pages_scanned",
-
+#if IS_ENABLED(CONFIG_ZSMALLOC)
+ "nr_zspages",
+#endif
#ifdef CONFIG_NUMA
"numa_hit",
"numa_miss",
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 6b6986a02aa0..e4e8081b160b 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1007,6 +1007,7 @@ static void __free_zspage(struct zs_pool *pool, struct size_class *class,
next = get_next_page(page);
reset_page(page);
unlock_page(page);
+ dec_zone_page_state(page, NR_ZSPAGES);
put_page(page);
page = next;
} while (page != NULL);
@@ -1137,11 +1138,15 @@ static struct zspage *alloc_zspage(struct zs_pool *pool,
page = alloc_page(gfp);
if (!page) {
- while (--i >= 0)
+ while (--i >= 0) {
+ dec_zone_page_state(pages[i], NR_ZSPAGES);
__free_page(pages[i]);
+ }
cache_free_zspage(pool, zspage);
return NULL;
}
+
+ inc_zone_page_state(page, NR_ZSPAGES);
pages[i] = page;
}