Jens Axboe
1e6563ffd0
UPSTREAM: mm: don't cap request size based on read-ahead setting ...
We ran into a funky issue, where someone doing 256K buffered reads saw
128K requests at the device level. Turns out it is read-ahead capping
the request size, since we use 128K as the default setting. This
doesn't make a lot of sense - if someone is issuing 256K reads, they
should see 256K reads, regardless of the read-ahead setting, if the
underlying device can support a 256K read in a single command.
This patch introduces a bdi hint, io_pages. This is the soft max IO
size for the lower level, I've hooked it up to the bdev settings here.
Read-ahead is modified to issue the maximum of the user request size,
and the read-ahead max size, but capped to the max request size on the
device side. The latter is done to avoid reading ahead too much, if the
application asks for a huge read. With this patch, the kernel behaves
like the application expects.
Change-Id: Ibe52ffac7a6e1ac86ed0c6a59a0f7a32d651ee5f
Link: http://lkml.kernel.org/r/1479498073-8657-1-git-send-email-axboe@fb.com
Signed-off-by: Jens Axboe <axboe@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
2019-01-23 22:15:45 +00:00
partitions/aix: fix usage of uninitialized lv_info and lvname structures
2018-09-19 22:47:15 +02:00
badblocks: fix wrong return value in badblocks_set if badblocks are disabled
2017-12-20 10:07:29 +01:00
bio-integrity: Do not allocate integrity context for bio w/o data
2018-04-13 19:48:18 +02:00
block: bvec_nr_vecs() returns value for wrong slab
2018-09-15 09:42:59 +02:00
block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg
2018-09-19 22:47:11 +02:00
This is the 4.9.115 stable release
2018-07-31 21:27:10 +02:00
block: Fix spelling in a source code comment
2016-07-20 21:28:22 -06:00
block: flush: fix IO hang in case of flood fua req
2016-10-26 07:49:27 -06:00
block: fix blk_integrity_register to use template's interval_exp if not 0
2017-05-20 14:28:36 +02:00
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
block: fix infinite loop if the device loses discard capability
2018-12-29 13:40:14 +01:00
blk_rq_map_user_iov: fix error override
2018-02-25 11:05:42 +01:00
block: make sure a big bio is split into at most 256 bvecs
2016-08-24 08:17:24 -06:00
blk-mq: allow the driver to pass in a queue mapping
2016-09-15 08:42:03 -06:00
blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL
2017-08-24 17:12:20 -07:00
blk-mq: initialize mq kobjects in blk_mq_init_allocated_queue()
2017-12-14 09:28:21 +01:00
blk-mq: Fix tagset reinit in the presence of cpu hot-unplug
2017-12-20 10:07:20 +01:00
Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block
2016-10-09 17:29:33 -07:00
block/mq: fix potential deadlock during cpu hotplug
2018-04-24 09:34:18 +02:00
blk-mq: initialize mq kobjects in blk_mq_init_allocated_queue()
2017-12-14 09:28:21 +01:00
UPSTREAM: mm: don't cap request size based on read-ahead setting
2019-01-23 22:15:45 +00:00
This adds a new gcc plugin named "latent_entropy". It is designed to
2016-10-15 10:03:15 -07:00
UPSTREAM: mm: don't cap request size based on read-ahead setting
2019-01-23 22:15:45 +00:00
block: support different tag allocation policy
2015-01-23 14:15:46 -07:00
blk-throttle: make sure expire time isn't too big
2018-03-22 09:17:44 +01:00
block: Fix a race between blk_cleanup_queue() and timeout handling
2017-11-30 08:39:06 +00:00
blk-mq: remove ->map_queue
2016-09-15 08:42:03 -06:00
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2015-09-19 18:57:09 -07:00
Revert "bsg-lib: don't free job in bsg_prepare_job"
2017-10-21 17:21:33 +02:00
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
2017-01-09 08:32:25 +01:00
block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg
2018-09-19 22:47:11 +02:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
block: do not merge requests without consulting with io scheduler
2016-07-20 21:35:12 -06:00
block: Fix secure erase
2016-08-16 09:16:51 -06:00
block: fix bdi vs gendisk lifetime mismatch
2016-08-04 14:19:16 -06:00
block: invalidate the page cache when issuing BLKZEROOUT
2016-10-11 15:06:30 -07:00
block: fix use-after-free in sys_ioprio_get()
2016-07-01 08:39:24 -06:00
Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block
2016-10-09 17:29:33 -07:00
Merge branch 'for-4.9/block-smp' of git://git.kernel.dk/linux-block
2016-10-09 17:32:20 -07:00
elevator: use list_{first,prev,next}_entry
2015-11-16 15:21:48 -07:00
block: fix an error code in add_partition()
2018-04-13 19:48:04 +02:00
block: allow WRITE_SAME commands with the SG_IO ioctl
2017-03-22 12:43:38 +01:00
block: Consolidate static integrity profile properties
2015-10-21 14:42:38 -06:00
1e6563ffd0