Brian King be14eb6191 block: Range check cpu in blk_cpu_to_group ...

While testing CPU DLPAR, the following problem was discovered.
We were DLPAR removing the first CPU, which in this case was
logical CPUs 0-3. CPUs 0-2 were already marked offline and
we were in the process of offlining CPU 3. After marking
the CPU inactive and offline in cpu_disable, but before the
cpu was completely idle (cpu_die), we ended up in __make_request
on CPU 3. There we looked at the topology map to see which CPU
to complete the I/O on and found no CPUs in the cpu_sibling_map.
This resulted in the block layer setting the completion cpu
to be NR_CPUS, which then caused an oops when we tried to
complete the I/O.

Fix this by sanity checking the value we return from blk_cpu_to_group
to be a valid cpu value.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

2010-09-10 09:03:21 +02:00

..

blk-barrier.c

block: set up rq->rq_disk properly for flush requests

2010-08-07 18:52:41 +02:00

blk-cgroup.c

blkio: Fix return code for mkdir calls

2010-08-23 10:56:30 +02:00

blk-cgroup.h

blk-cgroup: config options re-arrangement

2010-04-26 19:27:56 +02:00

blk-core.c

BLOCK: fix bio.bi_rw handling

2010-08-23 12:33:10 +02:00

blk-exec.c

block: remove wrappers for request type/flags

2010-08-07 18:17:56 +02:00

blk-integrity.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

blk-ioc.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

blk-iopoll.c

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

blk-lib.c

block: add secure discard

2010-08-12 08:43:30 -07:00

blk-map.c

block: unify flags for struct bio and struct request

2010-08-07 18:20:39 +02:00

blk-merge.c

gcc-4.6: block: fix unused but set variables in blk-merge

2010-08-07 18:23:10 +02:00

blk-settings.c

block: implement an unprep function corresponding directly to prep

2010-08-07 18:23:47 +02:00

blk-softirq.c

generic-ipi: remove CSD_FLAG_WAIT

2009-02-25 14:13:44 +01:00

blk-sysfs.c

block: put dev->kobj in blk_register_queue fail path

2010-08-23 12:30:29 +02:00

blk-tag.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

blk-timeout.c

block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer

2010-04-21 17:42:08 +02:00

blk.h

block: Range check cpu in blk_cpu_to_group

2010-09-10 09:03:21 +02:00

bsg.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

cfq-iosched.c

cfq-iosched: blktrace print per slice sector stats

2010-08-23 12:25:03 +02:00

cfq.h

cfq: fix recursive call in cfq_blkiocg_update_completion_stats()

2010-06-21 09:10:55 +02:00

compat_ioctl.c

block: add secure discard

2010-08-12 08:43:30 -07:00

deadline-iosched.c

block: convert to pos and nr_sectors accessors

2009-05-11 09:50:54 +02:00

elevator.c

block: add function call to switch the IO scheduler from a driver

2010-08-23 13:52:19 +02:00

genhd.c

block: remove all rcu head initializations

2010-05-21 20:01:02 +02:00

ioctl.c

block: add secure discard

2010-08-12 08:43:30 -07:00

Kconfig

blk-cgroup: config options re-arrangement

2010-04-26 19:27:56 +02:00

Kconfig.iosched

blk-cgroup: config options re-arrangement

2010-04-26 19:27:56 +02:00

Makefile

blkdev: move blkdev_issue helper functions to separate file

2010-04-28 19:47:36 +02:00

noop-iosched.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

scsi_ioctl.c

block/scsi_ioctl.c: quiet sparse noise

2009-11-04 09:10:33 +01:00