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In a fully-preemptible realtime kernel (CONFIG_PREEMPT_RT_FULL=y), SCSI commands from an initiator time out because the userland target application is never woken to process them. This is because in a fully-preemptible realtime kernel, soft-IRQ (tasklet) execution always occurs in a ksoftirqd thread and preempt_count is not manipulated on soft-IRQ processing entry/exit. This makes in_interrupt() useless for determining whether soft-IRQ processing is occurring; instead, in_serving_softirq() should be used for that purpose. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> [bvanassche: Elaborated source code comment] git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5272 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This is the SCST development repository. It contains not a single project SCST as one can think, but a number of them, which are divided as the following: 1. SCST core in scst/ subdirectory 2. Administration utility for SCST core scstadmin in scstadmin/ 3. Target drivers in own subdirectories qla2x00t/, iscsi-scst/, etc. 4. User space programs in usr/ subdirectory, like fileio_tgt. 5. Some various docs in doc/ subdirectory. Those subprojects are in most cases independent from each other, although some of them depend from the SCST core. They put in the single repository only to simplify their development, they are released independently. Thus, use "make all" only if you really need to build everything. Otherwise build only what you need, like for iSCSI-SCST: make scst scst_install iscsi iscsi_install For more information about each subproject see their README files. Vladislav Bolkhovitin <vst@vlnb.net>, http://scst.sourceforge.net