[PATCH RFC 2/4] dm thin: parse "keep_bio_blkcg" from userspace tools
DORMANTno replies
From: Hou Tao <hidden>
Date: 2017-01-20 11:19:07
Also in:
dm-devel
Subsystem:
device-mapper (lvm), the rest · Maintainers:
Alasdair Kergon, Mike Snitzer, Mikulas Patocka, Benjamin Marzinski, Linus Torvalds
keep_bio_blkcg feature is off by default, and it can be turned on by using "keep_bio_blkcg" argument. Signed-off-by: Hou Tao <redacted> --- drivers/md/dm-thin.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 8178ee8..57d6202 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c@@ -2824,6 +2824,7 @@ static void pool_features_init(struct pool_features *pf) pf->discard_enabled = true; pf->discard_passdown = true; pf->error_if_no_space = false; + pf->keep_bio_blkcg = false; } static void __pool_destroy(struct pool *pool)
@@ -3053,7 +3054,7 @@ static int parse_pool_features(struct dm_arg_set *as, struct pool_features *pf, const char *arg_name; static struct dm_arg _args[] = { - {0, 4, "Invalid number of pool feature arguments"}, + {0, 5, "Invalid number of pool feature arguments"}, }; /*
@@ -3085,6 +3086,9 @@ static int parse_pool_features(struct dm_arg_set *as, struct pool_features *pf, else if (!strcasecmp(arg_name, "error_if_no_space")) pf->error_if_no_space = true; + else if (!strcasecmp(arg_name, "keep_bio_blkcg")) + pf->keep_bio_blkcg = true; + else { ti->error = "Unrecognised pool feature requested"; r = -EINVAL;
--
2.5.0