From 21136f89d76dc10d31d294f2bb79c585a039bad6 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Wed, 10 Feb 2016 11:58:45 -0500 Subject: dm mpath: remove repeat_count support from multipath core Preparation for making __multipath_map() avoid taking the m->lock spinlock -- in favor of using RCU locking. repeat_count was primarily for bio-based DM multipath's benefit. There is really no need for it anymore now that DM multipath is request-based. As such, repeat_count > 1 is no longer honored and a warning is displayed if the user attempts to use a value > 1. This is a temporary change for the round-robin path-selector (as a later commit will restore its support for repeat_count > 1). Signed-off-by: Mike Snitzer --- drivers/md/dm-queue-length.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'drivers/md/dm-queue-length.c') diff --git a/drivers/md/dm-queue-length.c b/drivers/md/dm-queue-length.c index 3941fae0de9f..51d82290ad4c 100644 --- a/drivers/md/dm-queue-length.c +++ b/drivers/md/dm-queue-length.c @@ -23,8 +23,8 @@ #include #define DM_MSG_PREFIX "multipath queue-length" -#define QL_MIN_IO 128 -#define QL_VERSION "0.1.0" +#define QL_MIN_IO 1 +#define QL_VERSION "0.2.0" struct selector { struct list_head valid_paths; @@ -129,6 +129,11 @@ static int ql_add_path(struct path_selector *ps, struct dm_path *path, return -EINVAL; } + if (repeat_count > 1) { + DMWARN_LIMIT("repeat_count > 1 is deprecated, using 1 instead"); + repeat_count = 1; + } + /* Allocate the path information structure */ pi = kmalloc(sizeof(*pi), GFP_KERNEL); if (!pi) { -- cgit