From e8603136cb04ec2d0c9b4b5be7a071fc003cb399 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Thu, 12 Sep 2013 18:06:12 -0400 Subject: dm: add reserved_bio_based_ios module parameter Allow user to change the number of IOs that are reserved by bio-based DM's mempools by writing to this file: /sys/module/dm_mod/parameters/reserved_bio_based_ios The default value is RESERVED_BIO_BASED_IOS (16). The maximum allowed value is RESERVED_MAX_IOS (1024). Export dm_get_reserved_bio_based_ios() for use by DM targets and core code. Switch to sizing dm-io's mempool and bioset using DM core's configurable 'reserved_bio_based_ios'. Signed-off-by: Mike Snitzer Signed-off-by: Frank Mayhar --- drivers/md/dm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/md/dm.h') diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 15396501e0b..1d1ad7b7e52 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -184,6 +184,7 @@ void dm_free_md_mempools(struct dm_md_mempools *pools); /* * Helpers that are used by DM core */ +unsigned dm_get_reserved_bio_based_ios(void); unsigned dm_get_reserved_rq_based_ios(void); static inline bool dm_message_test_buffer_overflow(char *result, unsigned maxlen) -- cgit v1.2.3