| From 6da135b233dcf8d90ca75fb973a6aa591dedd535 Mon Sep 17 00:00:00 2001 |
| From: Huaisheng Ye <yehs1@lenovo.com> |
| Date: Mon, 2 Sep 2019 18:04:50 +0800 |
| Subject: [PATCH] dm writecache: skip writecache_wait for pmem mode |
| |
| commit 6d1959138c8bdaf69f1116c86c77e6733db6ab34 upstream. |
| |
| The array bio_in_progress[2] only have chance to be increased and |
| decreased with ssd mode. For pmem mode, they are not involved at all. |
| So skip writecache_wait_for_ios in writecache_flush for pmem. |
| |
| Suggested-by: Doris Yu <tyu1@lenovo.com> |
| Signed-off-by: Huaisheng Ye <yehs1@lenovo.com> |
| Acked-by: Mikulas Patocka <mpatocka@redhat.com> |
| Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c |
| index 598e5fafbeed..8507b719ca87 100644 |
| --- a/drivers/md/dm-writecache.c |
| +++ b/drivers/md/dm-writecache.c |
| @@ -727,7 +727,8 @@ static void writecache_flush(struct dm_writecache *wc) |
| } |
| writecache_commit_flushed(wc); |
| |
| - writecache_wait_for_ios(wc, WRITE); |
| + if (!WC_MODE_PMEM(wc)) |
| + writecache_wait_for_ios(wc, WRITE); |
| |
| wc->seq_count++; |
| pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count)); |
| -- |
| 2.7.4 |
| |
