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SubjectRe: [PATCH 2/3] f2fs: shrink blk plug region
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Hi Jaegeuk,

Just reminding, miss merging this patch? :)

Thanks,

On 2017/3/27 18:14, Chao Yu wrote:
> Don't use blk plug covering area where there won't be any IOs being issued.
>
> Signed-off-by: Chao Yu <yuchao0@huawei.com>
> ---
> fs/f2fs/segment.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index c1a03b0857f9..57a81f9c8c14 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -848,9 +848,8 @@ static int issue_discard_thread(void *data)
> if (kthread_should_stop())
> return 0;
>
> - blk_start_plug(&plug);
> -
> mutex_lock(&dcc->cmd_lock);
> + blk_start_plug(&plug);
> list_for_each_entry_safe(dc, tmp, pend_list, list) {
> f2fs_bug_on(sbi, dc->state != D_PREP);
>
> @@ -860,6 +859,7 @@ static int issue_discard_thread(void *data)
> if (iter++ > DISCARD_ISSUE_RATE)
> break;
> }
> + blk_finish_plug(&plug);
>
> list_for_each_entry_safe(dc, tmp, wait_list, list) {
> if (dc->state == D_DONE)
> @@ -867,8 +867,6 @@ static int issue_discard_thread(void *data)
> }
> mutex_unlock(&dcc->cmd_lock);
>
> - blk_finish_plug(&plug);
> -
> iter = 0;
> congestion_wait(BLK_RW_SYNC, HZ/50);
>
>

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