PATCHES/patches/0023-bcache-Populate-writeback_rate_minimum-attribute.patch

From 8bcd338454f860df2c8ea64f605ae183e338755c Mon Sep 17 00:00:00 2001
From: Ben Peddell <klightspeed@killerwolves.net>
Date: Mon, 8 Oct 2018 20:41:13 +0800
Subject: [PATCH 023/145] bcache: Populate writeback_rate_minimum attribute

[ Upstream commit 7567c2a2ad9e80a2ce977eef535e64b61899633e ]

Forgot to include the maintainers with my first email.

Somewhere between Michael Lyle's original
"bcache: PI controller for writeback rate V2" patch dated 07 Sep 2017
and 1d316e6 bcache: implement PI controller for writeback rate,
the mapping of the writeback_rate_minimum attribute was dropped.

Re-add the missing sysfs writeback_rate_minimum attribute mapping to
"allow the user to specify a minimum rate at which dirty blocks are
retired."

Fixes: 1d316e6 ("bcache: implement PI controller for writeback rate")
Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/md/bcache/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 150cf4f4cf74..26f035a0c5b9 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -285,6 +285,7 @@ STORE(__cached_dev)
                            1, WRITEBACK_RATE_UPDATE_SECS_MAX);
        d_strtoul(writeback_rate_i_term_inverse);
        d_strtoul_nonzero(writeback_rate_p_term_inverse);
+       d_strtoul_nonzero(writeback_rate_minimum);
 
        sysfs_strtoul_clamp(io_error_limit, dc->error_limit, 0, INT_MAX);
 
@@ -412,6 +413,7 @@ static struct attribute *bch_cached_dev_files[] = {
        &sysfs_writeback_rate_update_seconds,
        &sysfs_writeback_rate_i_term_inverse,
        &sysfs_writeback_rate_p_term_inverse,
+       &sysfs_writeback_rate_minimum,
        &sysfs_writeback_rate_debug,
        &sysfs_errors,
        &sysfs_io_error_limit,
-- 
2.19.1

1	From 8bcd338454f860df2c8ea64f605ae183e338755c Mon Sep 17 00:00:00 2001
2	From: Ben Peddell <klightspeed@killerwolves.net>
3	Date: Mon, 8 Oct 2018 20:41:13 +0800
4	Subject: [PATCH 023/145] bcache: Populate writeback_rate_minimum attribute
5
6	[ Upstream commit 7567c2a2ad9e80a2ce977eef535e64b61899633e ]
7
8	Forgot to include the maintainers with my first email.
9
10	Somewhere between Michael Lyle's original
11	"bcache: PI controller for writeback rate V2" patch dated 07 Sep 2017
12	and 1d316e6 bcache: implement PI controller for writeback rate,
13	the mapping of the writeback_rate_minimum attribute was dropped.
14
15	Re-add the missing sysfs writeback_rate_minimum attribute mapping to
16	"allow the user to specify a minimum rate at which dirty blocks are
17	retired."
18
19	Fixes: 1d316e6 ("bcache: implement PI controller for writeback rate")
20	Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
21	Signed-off-by: Coly Li <colyli@suse.de>
22	Signed-off-by: Jens Axboe <axboe@kernel.dk>
23	Signed-off-by: Sasha Levin <sashal@kernel.org>
24	---
25	drivers/md/bcache/sysfs.c \| 2 ++
26	1 file changed, 2 insertions(+)
27
28	diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
29	index 150cf4f4cf74..26f035a0c5b9 100644
30	--- a/drivers/md/bcache/sysfs.c
31	+++ b/drivers/md/bcache/sysfs.c
32	@@ -285,6 +285,7 @@ STORE(__cached_dev)
33	1, WRITEBACK_RATE_UPDATE_SECS_MAX);
34	d_strtoul(writeback_rate_i_term_inverse);
35	d_strtoul_nonzero(writeback_rate_p_term_inverse);
36	+ d_strtoul_nonzero(writeback_rate_minimum);
37
38	sysfs_strtoul_clamp(io_error_limit, dc->error_limit, 0, INT_MAX);
39
40	@@ -412,6 +413,7 @@ static struct attribute *bch_cached_dev_files[] = {
41	&sysfs_writeback_rate_update_seconds,
42	&sysfs_writeback_rate_i_term_inverse,
43	&sysfs_writeback_rate_p_term_inverse,
44	+ &sysfs_writeback_rate_minimum,
45	&sysfs_writeback_rate_debug,
46	&sysfs_errors,
47	&sysfs_io_error_limit,
48	--
49	2.19.1
50