From: Jens Axboe <axboe@fb.com>
To: <axboe@kernel.dk>, <linux-kernel@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>, <linux-block@vger.kernel.org>
Cc: <jack@suse.cz>, <hch@lst.de>, Jens Axboe <axboe@fb.com>
Subject: [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages()
Date: Tue, 1 Nov 2016 15:08:47 -0600 [thread overview]
Message-ID: <1478034531-28559-5-git-send-email-axboe@fb.com> (raw)
In-Reply-To: <1478034531-28559-1-git-send-email-axboe@fb.com>
Note in the bdi_writeback structure whenever a task ends up sleeping
waiting for progress. We can use that information in the lower layers
to increase the priority of writes.
Signed-off-by: Jens Axboe <axboe@fb.com>
---
include/linux/backing-dev-defs.h | 2 ++
mm/backing-dev.c | 1 +
mm/page-writeback.c | 1 +
3 files changed, 4 insertions(+)
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index c357f27d5483..dc5f76d7f648 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -116,6 +116,8 @@ struct bdi_writeback {
struct list_head work_list;
struct delayed_work dwork; /* work item used for writeback */
+ unsigned long dirty_sleep; /* last wait */
+
struct list_head bdi_node; /* anchored at bdi->wb_list */
#ifdef CONFIG_CGROUP_WRITEBACK
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 8fde443f36d7..3bfed5ab2475 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -310,6 +310,7 @@ static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi,
spin_lock_init(&wb->work_lock);
INIT_LIST_HEAD(&wb->work_list);
INIT_DELAYED_WORK(&wb->dwork, wb_workfn);
+ wb->dirty_sleep = jiffies;
wb->congested = wb_congested_get_create(bdi, blkcg_id, gfp);
if (!wb->congested)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 439cc63ad903..52e2f8e3b472 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1778,6 +1778,7 @@ static void balance_dirty_pages(struct address_space *mapping,
pause,
start_time);
__set_current_state(TASK_KILLABLE);
+ wb->dirty_sleep = now;
io_schedule_timeout(pause);
current->dirty_paused_when = now + pause;
--
2.7.4
next prev parent reply other threads:[~2016-11-01 21:09 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-01 21:08 [PATCHSET] Throttled buffered writeback Jens Axboe
2016-11-01 21:08 ` [PATCH 1/8] block: add WRITE_BACKGROUND Jens Axboe
2016-11-02 14:55 ` Christoph Hellwig
2016-11-02 16:22 ` Jens Axboe
2016-11-05 22:27 ` Jan Kara
2016-11-01 21:08 ` [PATCH 2/8] writeback: add wbc_to_write_flags() Jens Axboe
2016-11-02 14:56 ` Christoph Hellwig
2016-11-01 21:08 ` [PATCH 3/8] writeback: mark background writeback as such Jens Axboe
2016-11-02 14:56 ` Christoph Hellwig
2016-11-05 22:26 ` Jan Kara
2016-11-01 21:08 ` Jens Axboe [this message]
2016-11-02 14:57 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Christoph Hellwig
2016-11-02 14:59 ` Jens Axboe
2016-11-08 13:02 ` Jan Kara
2016-11-01 21:08 ` [PATCH 5/8] block: add code to track actual device queue depth Jens Axboe
2016-11-02 14:59 ` Christoph Hellwig
2016-11-02 15:02 ` Jens Axboe
2016-11-02 16:40 ` Johannes Thumshirn
2016-11-05 22:37 ` Jan Kara
2016-11-01 21:08 ` [PATCH 6/8] block: add scalable completion tracking of requests Jens Axboe
2016-11-08 13:30 ` Jan Kara
2016-11-08 15:25 ` Jens Axboe
2016-11-09 9:01 ` Jan Kara
2016-11-09 16:09 ` Jens Axboe
2016-11-09 19:52 ` Jens Axboe
2016-11-10 19:38 ` Jan Kara
2016-11-12 5:19 ` Jens Axboe
2016-11-01 21:08 ` [PATCH 7/8] blk-wbt: add general throttling mechanism Jens Axboe
2016-11-08 13:39 ` Jan Kara
2016-11-08 15:41 ` Jens Axboe
2016-11-09 8:40 ` Jan Kara
2016-11-09 16:07 ` Jens Axboe
2016-11-09 19:52 ` Jens Axboe
2016-11-10 19:36 ` Jan Kara
2016-11-10 0:00 ` Dave Chinner
2016-11-01 21:08 ` [PATCH 8/8] block: hook up writeback throttling Jens Axboe
2016-11-08 13:42 ` Jan Kara
2016-11-08 15:16 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2016-10-26 20:52 [PATCHSET] block: buffered " Jens Axboe
2016-10-26 20:52 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-09-07 14:46 [PATCH 0/8] Throttled background buffered writeback v7 Jens Axboe
2016-09-07 14:46 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-08-31 17:05 [PATCHSET v6] Throttled background buffered writeback Jens Axboe
2016-08-31 17:05 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-04-26 15:55 [PATCHSET v5] Make background writeback great again for the first time Jens Axboe
2016-04-26 15:55 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-04-18 4:24 [PATCHSET v4 0/8] Make background writeback not suck Jens Axboe
2016-04-18 4:24 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-03-23 15:25 Jens Axboe
2016-03-23 15:25 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
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