linux/block
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
Kconfig
Kconfig.iosched
Makefile
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
blk-core.c scsi-mq: fix requests that use a separate CDB buffer 2014-08-22 15:04:31 -05:00
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-iopoll.c
blk-lib.c
blk-map.c
blk-merge.c blk-merge: fix blk_recount_segments 2014-09-02 10:25:12 -06:00
blk-mq-cpu.c
blk-mq-cpumap.c
blk-mq-sysfs.c
blk-mq-tag.c
blk-mq-tag.h
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-settings.c
blk-softirq.c
blk-sysfs.c Block: fix unbalanced bypass-disable in blk_register_queue 2014-09-09 10:44:24 -06:00
blk-tag.c
blk-throttle.c
blk-timeout.c
blk.h
bounce.c
bsg-lib.c
bsg.c
cfq-iosched.c cfq-iosched: Add comments on update timing of weight 2014-08-28 08:16:29 -06:00
cmdline-parser.c
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
elevator.c
genhd.c block: Fix dev_t minor allocation lifetime 2014-09-03 15:01:02 -06:00
ioctl.c
ioprio.c
noop-iosched.c
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