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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 10:19:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 10:19:16 -0800
commit36869cb93d36269f34800b3384ba7991060a69cf (patch)
tree1ff266dcb3386bb1403494aa89647a96fd2396cd /block/blk-settings.c
parent9439b3710df688d853eb6cb4851256f2c92b1797 (diff)
parent7cd54aa8438947602cf68eda1db327822b9b8e6b (diff)
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe: "This is the main block pull request this series. Contrary to previous release, I've kept the core and driver changes in the same branch. We always ended up having dependencies between the two for obvious reasons, so makes more sense to keep them together. That said, I'll probably try and keep more topical branches going forward, especially for cycles that end up being as busy as this one. The major parts of this pull request is: - Improved support for O_DIRECT on block devices, with a small private implementation instead of using the pig that is fs/direct-io.c. From Christoph. - Request completion tracking in a scalable fashion. This is utilized by two components in this pull, the new hybrid polling and the writeback queue throttling code. - Improved support for polling with O_DIRECT, adding a hybrid mode that combines pure polling with an initial sleep. From me. - Support for automatic throttling of writeback queues on the block side. This uses feedback from the device completion latencies to scale the queue on the block side up or down. From me. - Support from SMR drives in the block layer and for SD. From Hannes and Shaun. - Multi-connection support for nbd. From Josef. - Cleanup of request and bio flags, so we have a clear split between which are bio (or rq) private, and which ones are shared. From Christoph. - A set of patches from Bart, that improve how we handle queue stopping and starting in blk-mq. - Support for WRITE_ZEROES from Chaitanya. - Lightnvm updates from Javier/Matias. - Supoort for FC for the nvme-over-fabrics code. From James Smart. - A bunch of fixes from a whole slew of people, too many to name here" * 'for-4.10/block' of git://git.kernel.dk/linux-block: (182 commits) blk-stat: fix a few cases of missing batch flushing blk-flush: run the queue when inserting blk-mq flush elevator: make the rqhash helpers exported blk-mq: abstract out blk_mq_dispatch_rq_list() helper blk-mq: add blk_mq_start_stopped_hw_queue() block: improve handling of the magic discard payload blk-wbt: don't throttle discard or write zeroes nbd: use dev_err_ratelimited in io path nbd: reset the setup task for NBD_CLEAR_SOCK nvme-fabrics: Add FC LLDD loopback driver to test FC-NVME nvme-fabrics: Add target support for FC transport nvme-fabrics: Add host support for FC transport nvme-fabrics: Add FC transport LLDD api definitions nvme-fabrics: Add FC transport FC-NVME definitions nvme-fabrics: Add FC transport error codes to nvme.h Add type 0x28 NVME type code to scsi fc headers nvme-fabrics: patch target code in prep for FC transport support nvme-fabrics: set sqe.command_id in core not transports parser: add u64 number parser nvme-rdma: align to generic ib_event logging helper ...
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 65f16cf4f850..529e55f52a03 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -13,6 +13,7 @@
#include <linux/gfp.h>
#include "blk.h"
+#include "blk-wbt.h"
unsigned long blk_max_low_pfn;
EXPORT_SYMBOL(blk_max_low_pfn);
@@ -95,6 +96,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->max_dev_sectors = 0;
lim->chunk_sectors = 0;
lim->max_write_same_sectors = 0;
+ lim->max_write_zeroes_sectors = 0;
lim->max_discard_sectors = 0;
lim->max_hw_discard_sectors = 0;
lim->discard_granularity = 0;
@@ -107,6 +109,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->io_opt = 0;
lim->misaligned = 0;
lim->cluster = 1;
+ lim->zoned = BLK_ZONED_NONE;
}
EXPORT_SYMBOL(blk_set_default_limits);
@@ -130,6 +133,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
lim->max_sectors = UINT_MAX;
lim->max_dev_sectors = UINT_MAX;
lim->max_write_same_sectors = UINT_MAX;
+ lim->max_write_zeroes_sectors = UINT_MAX;
}
EXPORT_SYMBOL(blk_set_stacking_limits);
@@ -299,6 +303,19 @@ void blk_queue_max_write_same_sectors(struct request_queue *q,
EXPORT_SYMBOL(blk_queue_max_write_same_sectors);
/**
+ * blk_queue_max_write_zeroes_sectors - set max sectors for a single
+ * write zeroes
+ * @q: the request queue for the device
+ * @max_write_zeroes_sectors: maximum number of sectors to write per command
+ **/
+void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
+ unsigned int max_write_zeroes_sectors)
+{
+ q->limits.max_write_zeroes_sectors = max_write_zeroes_sectors;
+}
+EXPORT_SYMBOL(blk_queue_max_write_zeroes_sectors);
+
+/**
* blk_queue_max_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
* @max_segments: max number of segments
@@ -526,6 +543,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->max_dev_sectors = min_not_zero(t->max_dev_sectors, b->max_dev_sectors);
t->max_write_same_sectors = min(t->max_write_same_sectors,
b->max_write_same_sectors);
+ t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors,
+ b->max_write_zeroes_sectors);
t->bounce_pfn = min_not_zero(t->bounce_pfn, b->bounce_pfn);
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
@@ -631,6 +650,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->discard_granularity;
}
+ if (b->chunk_sectors)
+ t->chunk_sectors = min_not_zero(t->chunk_sectors,
+ b->chunk_sectors);
+
return ret;
}
EXPORT_SYMBOL(blk_stack_limits);
@@ -833,6 +856,19 @@ void blk_queue_flush_queueable(struct request_queue *q, bool queueable)
EXPORT_SYMBOL_GPL(blk_queue_flush_queueable);
/**
+ * blk_set_queue_depth - tell the block layer about the device queue depth
+ * @q: the request queue for the device
+ * @depth: queue depth
+ *
+ */
+void blk_set_queue_depth(struct request_queue *q, unsigned int depth)
+{
+ q->queue_depth = depth;
+ wbt_set_queue_depth(q->rq_wb, depth);
+}
+EXPORT_SYMBOL(blk_set_queue_depth);
+
+/**
* blk_queue_write_cache - configure queue's write cache
* @q: the request queue for the device
* @wc: write back cache on or off
@@ -852,6 +888,8 @@ void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
else
queue_flag_clear(QUEUE_FLAG_FUA, q);
spin_unlock_irq(q->queue_lock);
+
+ wbt_set_write_cache(q->rq_wb, test_bit(QUEUE_FLAG_WC, &q->queue_flags));
}
EXPORT_SYMBOL_GPL(blk_queue_write_cache);