Jens Axboe a516440542 blk-mq: scale depth and rq map appropriate if low on memory ...

If we are running in a kdump environment, resources are scarce.
For some SCSI setups with a huge set of shared tags, we run out
of memory allocating what the drivers is asking for. So implement
a scale back logic to reduce the tag depth for those cases, allowing
the driver to successfully load.

We should extend this to detect low memory situations, and implement
a sane fallback for those (1 queue, 64 tags, or something like that).

Tested-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

2014-09-10 09:02:03 -06:00

..

partitions

partitions: aix.c: off by one bug

2014-08-05 13:13:24 -06:00

bio-integrity.c

block: Fix BUG_ON when pi errors occur

2014-08-21 20:37:47 -05:00

bio.c

block: use kmalloc alignment for bio slab

2014-08-01 12:30:34 -04:00

blk-cgroup.c

Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2014-08-04 10:11:28 -07:00

blk-cgroup.h

Revert "block: add __init to blkcg_policy_register"

2014-06-22 16:34:11 -06:00

blk-core.c

scsi-mq: fix requests that use a separate CDB buffer

2014-08-22 15:04:31 -05:00

blk-exec.c

block: blk-exec.c: Cleaning up local variable address returnd

2014-06-08 19:51:31 -06:00

blk-flush.c

block: remove elv_abort_queue and blk_abort_flushes

2014-06-11 15:31:21 -06:00

blk-integrity.c

bio-integrity: Convert to bvec_iter

2013-11-23 22:33:50 -08:00

blk-ioc.c

block: Substitute rcu_access_pointer() for rcu_dereference_raw()

2014-02-18 12:21:26 -08:00

blk-iopoll.c

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next

2014-06-03 12:57:53 -07:00

blk-lib.c

block/blk-lib.c: make __blkdev_issue_zeroout static

2014-05-26 17:39:09 -06:00

blk-map.c

block: remove struct request buffer member

2014-04-15 14:03:02 -06:00

blk-merge.c

blk-merge: fix blk_recount_segments

2014-09-02 10:25:12 -06:00

blk-mq-cpu.c

blk-mq: add file comments and update copyright notices

2014-05-28 10:15:41 -06:00

blk-mq-cpumap.c

blk-mq: add file comments and update copyright notices

2014-05-28 10:15:41 -06:00

blk-mq-sysfs.c

blk-mq: blk_mq_unregister_hctx() can be static

2014-05-30 10:31:13 -06:00

blk-mq-tag.c

blk-mq: bitmap tag: fix races in bt_get() function

2014-06-17 22:13:08 -07:00

blk-mq-tag.h

blk-mq: bitmap tag: fix races on shared ::wake_index fields

2014-06-17 22:12:35 -07:00

blk-mq.c

blk-mq: scale depth and rq map appropriate if low on memory

2014-09-10 09:02:03 -06:00

blk-mq.h

blk-mq: decouble blk-mq freezing from generic bypassing

2014-07-01 10:31:13 -06:00

blk-settings.c

block: ensure that bio_add_page() always accepts a page for an empty bio

2014-06-10 12:53:56 -06:00

blk-softirq.c

block: fix regression with block enabled tagging

2014-04-09 21:54:06 -06:00

blk-sysfs.c

Block: fix unbalanced bypass-disable in blk_register_queue

2014-09-09 10:44:24 -06:00

blk-tag.c

block: don't assume last put of shared tags is for the host

2014-07-08 12:25:28 +02:00

blk-throttle.c

cgroup: remove sane_behavior support on non-default hierarchies

2014-07-09 10:08:08 -04:00

blk-timeout.c

block: ensure that the timer is always added

2014-05-30 15:41:39 -06:00

blk.h

block: remove elv_abort_queue and blk_abort_flushes

2014-06-11 15:31:21 -06:00

bounce.c

mm: convert some level-less printks to pr_*

2014-06-06 16:08:18 -07:00

bsg-lib.c

bsg: Remove unused function bsg_goose_queue()

2012-12-06 14:33:02 +01:00

bsg.c

block: add blk_rq_set_block_pc()

2014-06-06 07:57:37 -06:00

cfq-iosched.c

cfq-iosched: Add comments on update timing of weight

2014-08-28 08:16:29 -06:00

cmdline-parser.c

block: remove unrelated header files and export symbol

2014-01-21 20:18:26 -08:00

compat_ioctl.c

Merge branch 'for-3.17/core' of git://git.kernel.dk/linux-block

2014-08-14 09:07:02 -06:00

deadline-iosched.c

block: Stop abusing csd.list for fifo_time

2014-02-24 14:46:32 -08:00

elevator.c

Revert "block: add __init to elv_register"

2014-06-22 16:34:11 -06:00

genhd.c

block: Fix dev_t minor allocation lifetime

2014-09-03 15:01:02 -06:00

ioctl.c

block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX

2014-07-01 10:43:07 -06:00

ioprio.c

block: move ioprio.c from fs/ to block/

2014-05-19 11:02:18 -06:00

Kconfig

block: change config option name for cmdline partition parsing

2013-09-30 14:31:02 -07:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

block: move mm/bounce.c to block/

2014-05-19 20:01:52 -06:00

noop-iosched.c

elevator: Fix a race in elevator switching

2013-07-03 13:25:24 +02:00

partition-generic.c

block: Fix dev_t minor allocation lifetime

2014-09-03 15:01:02 -06:00

scsi_ioctl.c

block: fix error handling in sg_io

2014-08-26 08:20:01 -06:00