This attribute exports per LUN thread index assigned by
scst_add_threads(). It can be used to look up which export thread is
serving which target since this index also appears in the export thread
name. This information then could be used to set CPU affinity for those threads to improve performance.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7076 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch trying to allocate memory in per-NUMA and per-CPU manner to
(significantly) improve performance for high IOPS cases.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7075 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This per-device attribute allows to control maximum number of SCSI
commands any session to this device can have in flight. It makes
currently hardcoded constant be run time configurable.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7073 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch adds gen_tp_soft_threshold_reached_UA attribute for thin
provisioned devices that allows to generate THIN PROVISIONING SOFT
THRESHOLD REACHED Unit Attention.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7071 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The old version had management incompatible with scstadmin and had
issues with LUNs management.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6694 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The T10-PI patch (r6162) increases the time needed to run mkfs.ext4
over iSCSI from less than a second to several minutes. This is a
regression so revert the T10-PI patch until there is sufficient time
to find the root cause of this regression and to fix this regression.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6171 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Thanks to SanDisk and Emulex for supporting this work!
Tested with Emulex SDK Release 5.2.1
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6162 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Changes in this patch:
- Rework the SCSI pass-through code such that for kernel versions
>= 2.6.30 the scst_exec_req_fifo patch is no longer needed.
- Modify the pass-through code such that blk_rq_append_bio() is only
called for kernel version 2.6.30. For later kernel versions
blk_make_request() is called instead.
- Rework scst_scsi_exec_async().
- Add debug tracing of SCSI pass-through result status.
- Add a lockdep_assert_held() call in scsi_end_async().
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5979 d57e44dd-8a1f-0410-8b47-8ef2f437770f
For SCST devices with a short name determining which SCST command
threads serve a given LUN requires an (expensive) walk of the
process table. For SCST devices with a long name it is not possible
to determine unambiguously which command threads serve a given
LUN. Hence add a thread_pid sysfs attribute that makes it easy to
figure out which command threads serve a LUN.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5851 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The sessions/<sess>/lun<X> sysfs attribute "active_commands" is not
yet documented. Hence add documentation for that sysfs attribute.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5850 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Make the SCSI device identification page (83h) EUI-64 and NAA
IDs configurable. If neither the eui64_id nor the naa_id sysfs
attribute has been set, export the first eight bytes of the
t10_dev_id as an EUI-64 ID. If the NAA ID but not the EUI-64 ID
has been set, report the NAA ID only. If both IDs have been set,
report both.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5730 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Add an attribute called "read_zero" to vdisk_nullio devices that
controls whether or not READs from a vdisk_nullio device return
zeroed data buffers.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5539 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Make the path of the file in which persistent reservation information
is stored configurable via sysfs.
Signed-off-by: Bart Van Assche <bvanassche@acm.org> with some improvements and fixes
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5510 d57e44dd-8a1f-0410-8b47-8ef2f437770f
