On Fri, 2018-03-30 at 10:23 +0200, Paolo Valente wrote: > Still 4.16-rc1, being that the version for which you reported this > issue in the first place. A vanilla v4.16-rc1 kernel is not sufficient to run the srp-test software since RDMA/CM support for the SRP target driver is missing from that kernel. That's why I asked you to use the for-next branch from my github repository in a previous e-mail. Anyway, since the necessary patches are now in linux-next, the srp-test software can also be run against linux-next. Here are the results that I obtained with label next-20180329 and the kernel config attached to your previous e-mail: # while ./srp-test/run_tests -c -d -r 10 -e bfq; do :; done BUG: unable to handle kernel NULL pointer dereference at 0000000000000200 PGD 0 P4D 0 Oops: 0002 [#1] SMP PTI Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014 RIP: 0010:rb_erase+0x284/0x380 Call Trace: <IRQ> elv_rb_del+0x24/0x30 bfq_remove_request+0x9a/0x2e0 [bfq] ? rcu_read_lock_sched_held+0x64/0x70 ? update_load_avg+0x72b/0x760 bfq_finish_requeue_request+0x2e1/0x3b0 [bfq] ? __lock_is_held+0x5a/0xa0 blk_mq_free_request+0x5f/0x1a0 blk_put_request+0x23/0x60 multipath_release_clone+0xe/0x10 dm_softirq_done+0xe3/0x270 __blk_mq_complete_request_remote+0x18/0x20 flush_smp_call_function_queue+0xa1/0x150 generic_smp_call_function_single_interrupt+0x13/0x30 smp_call_function_single_interrupt+0x4d/0x220 call_function_single_interrupt+0xf/0x20 </IRQ> Bart.
