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authorChao Yu <yuchao0@huawei.com>2018-09-29 18:31:28 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2018-09-30 18:33:34 -0700
commit274bd9ba39425610fdb9a6827602197a5cd27cd8 (patch)
tree9f0502bf4cbc4364a61a1553ec96c5bd0d767975 /fs/f2fs/gc.c
parentb63e7be5908cb757fc6b98fb9534dabd78b5338a (diff)
downloadlinux-274bd9ba39425610fdb9a6827602197a5cd27cd8.tar.bz2
f2fs: add to account skip count of background GC
This patch adds to account skip count of background GC, and show stat info via 'status' debugfs entry. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/gc.c')
-rw-r--r--fs/f2fs/gc.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index f541aa3ff7d5..99ed8a5d9249 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -40,13 +40,16 @@ static int gc_thread_func(void *data)
if (gc_th->gc_wake)
gc_th->gc_wake = 0;
- if (try_to_freeze())
+ if (try_to_freeze()) {
+ stat_other_skip_bggc_count(sbi);
continue;
+ }
if (kthread_should_stop())
break;
if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) {
increase_sleep_time(gc_th, &wait_ms);
+ stat_other_skip_bggc_count(sbi);
continue;
}
@@ -55,8 +58,10 @@ static int gc_thread_func(void *data)
f2fs_stop_checkpoint(sbi, false);
}
- if (!sb_start_write_trylock(sbi->sb))
+ if (!sb_start_write_trylock(sbi->sb)) {
+ stat_other_skip_bggc_count(sbi);
continue;
+ }
/*
* [GC triggering condition]
@@ -77,12 +82,15 @@ static int gc_thread_func(void *data)
goto do_gc;
}
- if (!mutex_trylock(&sbi->gc_mutex))
+ if (!mutex_trylock(&sbi->gc_mutex)) {
+ stat_other_skip_bggc_count(sbi);
goto next;
+ }
if (!is_idle(sbi, GC_TIME)) {
increase_sleep_time(gc_th, &wait_ms);
mutex_unlock(&sbi->gc_mutex);
+ stat_io_skip_bggc_count(sbi);
goto next;
}