The immediateExit() call introduced in r7014 prevents to assign multiple
values to attributes that support multiple values, e.g. 'allowed_portal'.
Hence revert r7014.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7092 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Avoid that the memory allocated for struct scst_acn and its name is
leaked by scst_del_acg().
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7090 d57e44dd-8a1f-0410-8b47-8ef2f437770f
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
ACA (Auto Contingent Allegiance) is a way to handle CHECK CONDITION
status. It significantly improves performance of AIX systems.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7072 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
If this attrubute is set, each iSCSI session for this initiator has
dedicated, i.e. not shared with other sessions, pool of the iscsi{wr,rd}
kernel threads.
Useful to control per-session CPU affinity to improve performance.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7069 d57e44dd-8a1f-0410-8b47-8ef2f437770f
It adds target_ip attribute containing target IP address in each
/sys/kernel/scst_tgt/targets/iscsi/TARGET/sessions/INITIATOR/INITIATOR_IP subdirectory.
It's useful to simplify monitoring management utilities
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7067 d57e44dd-8a1f-0410-8b47-8ef2f437770f
In some cases SCST needs to take multiple locks recursivly, e.g. to lock
all tgt_devs in a session. For this case SCST takes those locks in their
current sort order, e.g. by LUN for tgt_devs, then releases in the
opposite order. Unfortunately, lockdep complains on such actions as
recursive locking, then disables itself. The disabling itself action is
the most unpleasant one leading to lockdep being useless after this point.
Unfortunately, nested locking annotations can't help, because after
free, then alloc again, or after LUN change (in case of tgt_devs) order
of locks can change.
So, this patch implements a way to annotate some lock and unlock actions
as "no lockdep", so lockdep will not track them. It contains related
kernel patches for some kernels.
This is a debug aid only useful only with lockdep enabled kernels.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7065 d57e44dd-8a1f-0410-8b47-8ef2f437770f
