Mike Christie <michaelc@xxxxxxxxxxx> wrote: > Mike Christie wrote: >> adding linux-scsi and Mike Anderson >> >> David Strand wrote: >>> After updating to kernel 2.6.28 I found that when I performed some >>> cable break testing during device i/o, I would get unwanted device or >>> host resets. Ultimately I traced it back to this patch: >>> >>> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.29.y.git;a=commit;h=224cb3e981f1b2f9f93dbd49eaef505d17d894c2 >>> >>> >>> >>> The call to blk_abort_queue causes the block layer to call >>> scsi_times_out for pending i/o, which can (or will) ultimately lead to >>> device, and/or bus and/or host resets, which of course cause all the >>> other devices significant disruption. >>> >> >> What driver were you using? > > Oh yeah, I do not think this should happen in new kernels if the driver > is failing the IO with DID_TRANSPORT_DISRUPTED when it is deleting the > rport. That should cause the IO to requeue and wait for fast io fail to > fire. > > Maybe we just need to convert some more drivers? Yes, I am seeing this in my test runs using a DS4K storage device and the RDAC device handler. "Jun 5 00:39:58 elm3c244 kernel: [ 873.180267] sd 1:0:0:1: [sdd] Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK" -andmike -- Michael Anderson andmike@xxxxxxxxxxxxxxxxxx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
