Mike Christie bc166ca423 tcmu: release blocks for partially setup cmds ...

[ Upstream commit 810b8153c4243d2012a6ec002ddd3bbc9a9ae8c2 ]

If we cannot setup a cmd because we run out of ring space
or global pages release the blocks before sleeping. This
prevents a deadlock where dev0 has waiting_blocks set and
needs N blocks, but dev1 to devX have each allocated N / X blocks
and also hit the global block limit so they went to sleep.

find_free_blocks is not able to take the sleeping dev's
blocks becaause their waiting_blocks is set and even
if it was not the block returned by find_last_bit could equal
dbi_max. The latter will probably never happen because
DATA_BLOCK_BITS is so high but in the next patches
DATA_BLOCK_BITS and TCMU_GLOBAL_MAX_BLOCKS will be settable so
it might be lower and could happen.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-04-12 12:32:21 +02:00

..

iscsi

iscsi-target: make sure to wake up sleeping login worker

2018-02-22 15:42:29 +01:00

loopback

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sbp

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

tcm_fc

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig

block: make scsi_request and scsi ioctl support optional

2017-01-31 10:53:05 -07:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_alua.c

fs: fix kernel_write prototype

2017-09-04 19:05:15 -04:00

target_core_alua.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_configfs.c

target: export lio pgr/alua support as device attr

2017-07-10 20:05:27 -07:00

target_core_device.c

target: Fix cmd size for PR-OUT in passthrough_parse_cdb

2017-07-09 20:58:49 -07:00

target_core_fabric_configfs.c

target/configfs: Kill se_lun->lun_link_magic

2017-06-08 23:26:38 -07:00

target_core_fabric_lib.c

target: Use {get,put}_unaligned_be*() instead of open coding these functions

2017-07-06 22:57:59 -07:00

target_core_file.c

target/file: Do not return error for UNMAP if length is zero

2017-12-20 10:10:26 +01:00

target_core_file.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_hba.c

…

target_core_iblock.c

block: replace bi_bdev with a gendisk pointer and partitions index

2017-08-23 12:49:55 -06:00

target_core_iblock.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_internal.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_pr.c

target:fix condition return in core_pr_dump_initiator_port()

2017-12-20 10:10:25 +01:00

target_core_pr.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_pscsi.c

block: fix blk_rq_append_bio

2018-01-02 20:31:05 +01:00

target_core_pscsi.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_rd.c

target: break up free_device callback

2017-07-06 23:11:37 -07:00

target_core_rd.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_sbc.c

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

2017-07-13 14:27:32 -07:00

target_core_spc.c

target: Fix cmd size for PR-OUT in passthrough_parse_cdb

2017-07-09 20:58:49 -07:00

target_core_stat.c

target: Add counters for ABORT_TASK success + failure

2017-02-26 16:21:06 -08:00

target_core_tmr.c

target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK

2017-11-30 08:40:51 +00:00

target_core_tpg.c

target: Fix node_acl demo-mode + uncached dynamic shutdown regression

2017-08-09 20:55:19 -07:00

target_core_transport.c

target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK

2017-11-30 08:40:51 +00:00

target_core_ua.c

…

target_core_ua.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

target_core_user.c

tcmu: release blocks for partially setup cmds

2018-04-12 12:32:21 +02:00

target_core_xcopy.c

xcopy: loop over devices using idr helper

2017-07-06 23:11:40 -07:00

target_core_xcopy.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00