f2fs: try to freeze in gc and discard threads
This allows to freeze gc and discard threads.
Cc: [email protected]
Signed-off-by: Jaegeuk Kim <[email protected]>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 3bc3676..4591239 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -16,6 +16,7 @@
#include <linux/kthread.h>
#include <linux/swap.h>
#include <linux/timer.h>
+#include <linux/freezer.h>
#include "f2fs.h"
#include "segment.h"
@@ -1059,18 +1060,24 @@ static int issue_discard_thread(void *data)
struct f2fs_sb_info *sbi = data;
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
wait_queue_head_t *q = &dcc->discard_wait_queue;
-repeat:
- if (kthread_should_stop())
- return 0;
- __issue_discard_cmd(sbi, true);
- __wait_discard_cmd(sbi, true);
+ set_freezable();
- congestion_wait(BLK_RW_SYNC, HZ/50);
+ do {
+ wait_event_interruptible(*q, kthread_should_stop() ||
+ freezing(current) ||
+ atomic_read(&dcc->discard_cmd_cnt));
+ if (try_to_freeze())
+ continue;
+ if (kthread_should_stop())
+ return 0;
- wait_event_interruptible(*q, kthread_should_stop() ||
- atomic_read(&dcc->discard_cmd_cnt));
- goto repeat;
+ __issue_discard_cmd(sbi, true);
+ __wait_discard_cmd(sbi, true);
+
+ congestion_wait(BLK_RW_SYNC, HZ/50);
+ } while (!kthread_should_stop());
+ return 0;
}
#ifdef CONFIG_BLK_DEV_ZONED
