(added Doug to CC-list) On 04/05/2016 04:10 AM, Christoph Hellwig wrote:
Hi Nic, This series rewrites the session shutdown code so that it is a lot simpler in the core, doesn't rewrite boilerplat code in the fabrics drivers, and avoids a race window between session shutdown and unregistration for multiqueue drivers like srp. Below is receipt from Bart that he used to reproduce the session shutdown races: -------- snip -------- * Load the LIO core and ib_srpt kernel modules. * Configure LIO such that a RAM disk was exported through ib_srpt. * On the same system, using IB loopback, start srp_daemon such that the SRP initiator logs in. * Add support for LIO LUNs to /etc/multipath.conf with queue_if_no_path enabled. * Start multipath. * On top of the multipath device that was created for the LIO LUN, create a filesystem. * Run a fio data integrity test on top of that filesystem. * While fio was running, unload and reload LIO + ib_srpt every 30s. * Check that the fio IOPS drop to zero while LIO + ib_srpt were being restarted. -------- snip --------
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