diff options
| -rw-r--r-- | drivers/md/dm-bufio.c | 15 | ||||
| -rw-r--r-- | drivers/md/dm-era-target.c | 1 | ||||
| -rw-r--r-- | drivers/md/dm-mpath.c | 2 | ||||
| -rw-r--r-- | drivers/md/dm-raid.c | 6 | ||||
| -rw-r--r-- | drivers/md/dm-table.c | 43 |
5 files changed, 28 insertions, 39 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index 33bb074d6941..b8ac591aaaa7 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -974,7 +974,8 @@ static void __get_memory_limit(struct dm_bufio_client *c, buffers = c->minimum_buffers; *limit_buffers = buffers; - *threshold_buffers = buffers * DM_BUFIO_WRITEBACK_PERCENT / 100; + *threshold_buffers = mult_frac(buffers, + DM_BUFIO_WRITEBACK_PERCENT, 100); } /* @@ -1910,19 +1911,15 @@ static int __init dm_bufio_init(void) memset(&dm_bufio_caches, 0, sizeof dm_bufio_caches); memset(&dm_bufio_cache_names, 0, sizeof dm_bufio_cache_names); - mem = (__u64)((totalram_pages - totalhigh_pages) * - DM_BUFIO_MEMORY_PERCENT / 100) << PAGE_SHIFT; + mem = (__u64)mult_frac(totalram_pages - totalhigh_pages, + DM_BUFIO_MEMORY_PERCENT, 100) << PAGE_SHIFT; if (mem > ULONG_MAX) mem = ULONG_MAX; #ifdef CONFIG_MMU - /* - * Get the size of vmalloc space the same way as VMALLOC_TOTAL - * in fs/proc/internal.h - */ - if (mem > (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100) - mem = (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100; + if (mem > mult_frac(VMALLOC_TOTAL, DM_BUFIO_VMALLOC_PERCENT, 100)) + mem = mult_frac(VMALLOC_TOTAL, DM_BUFIO_VMALLOC_PERCENT, 100); #endif dm_bufio_default_cache_size = mem; diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c index ba84b8d62cd0..73a5c198113a 100644 --- a/drivers/md/dm-era-target.c +++ b/drivers/md/dm-era-target.c @@ -1513,7 +1513,6 @@ static int era_ctr(struct dm_target *ti, unsigned argc, char **argv) ti->flush_supported = true; ti->num_discard_bios = 1; - ti->discards_supported = true; era->callbacks.congested_fn = era_is_congested; dm_table_add_target_callbacks(ti->table, &era->callbacks); diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 204606bef9e2..c8faa2b85842 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -499,8 +499,6 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq, if (IS_ERR(clone)) { /* EBUSY, ENODEV or EWOULDBLOCK: requeue */ bool queue_dying = blk_queue_dying(q); - DMERR_LIMIT("blk_get_request() returned %ld%s - requeuing", - PTR_ERR(clone), queue_dying ? " (path offline)" : ""); if (queue_dying) { atomic_inc(&m->pg_init_in_progress); activate_or_offline_path(pgpath); diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 366c625b9591..6319d846e0ad 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -2887,9 +2887,6 @@ static void configure_discard_support(struct raid_set *rs) bool raid456; struct dm_target *ti = rs->ti; - /* Assume discards not supported until after checks below. */ - ti->discards_supported = false; - /* * XXX: RAID level 4,5,6 require zeroing for safety. */ @@ -2914,9 +2911,6 @@ static void configure_discard_support(struct raid_set *rs) } } - /* All RAID members properly support discards */ - ti->discards_supported = true; - /* * RAID1 and RAID10 personalities require bio splitting, * RAID0/4/5/6 don't and process large discard bios properly. diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 433bd3f3014c..88130b5d95f9 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1758,13 +1758,12 @@ static bool dm_table_supports_write_zeroes(struct dm_table *t) return true; } - -static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev, - sector_t start, sector_t len, void *data) +static int device_not_discard_capable(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) { struct request_queue *q = bdev_get_queue(dev->bdev); - return q && blk_queue_discard(q); + return q && !blk_queue_discard(q); } static bool dm_table_supports_discards(struct dm_table *t) @@ -1772,28 +1771,24 @@ static bool dm_table_supports_discards(struct dm_table *t) struct dm_target *ti; unsigned i; - /* - * Unless any target used by the table set discards_supported, - * require at least one underlying device to support discards. - * t->devices includes internal dm devices such as mirror logs - * so we need to use iterate_devices here, which targets - * supporting discard selectively must provide. - */ for (i = 0; i < dm_table_get_num_targets(t); i++) { ti = dm_table_get_target(t, i); if (!ti->num_discard_bios) - continue; - - if (ti->discards_supported) - return true; + return false; - if (ti->type->iterate_devices && - ti->type->iterate_devices(ti, device_discard_capable, NULL)) - return true; + /* + * Either the target provides discard support (as implied by setting + * 'discards_supported') or it relies on _all_ data devices having + * discard support. + */ + if (!ti->discards_supported && + (!ti->type->iterate_devices || + ti->type->iterate_devices(ti, device_not_discard_capable, NULL))) + return false; } - return false; + return true; } void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, @@ -1806,9 +1801,15 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, */ q->limits = *limits; - if (!dm_table_supports_discards(t)) + if (!dm_table_supports_discards(t)) { queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); - else + /* Must also clear discard limits... */ + q->limits.max_discard_sectors = 0; + q->limits.max_hw_discard_sectors = 0; + q->limits.discard_granularity = 0; + q->limits.discard_alignment = 0; + q->limits.discard_misaligned = 0; + } else queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) { |