----- Original Message ----- > From: "Bart Van Assche" <bart.vanassche@xxxxxxxxxxx> > To: "Laurence Oberman" <loberman@xxxxxxxxxx>, "Mike Snitzer" <snitzer@xxxxxxxxxx> > Cc: dm-devel@xxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx > Sent: Friday, August 5, 2016 2:42:49 PM > Subject: Re: dm-mq and end_clone_request() > > On 08/05/2016 04:43 AM, Laurence Oberman wrote: > > Further testing has shown we are still exposed here so more investigation > > is necessary. > > The above patch seems to help but I still see sporadic cases of errors > > escaping up the stack. > > > > I expect you will see the same so more work to do here to figure this out. > > Hello Laurence, > > Unfortunately I also still see sporadic I/O errors when testing > all-paths-down with CONFIG_DM_MQ_DEFAULT=n (I have not yet tried to > retest with CONFIG_DM_MQ_DEFAULT=y). > > Bart. > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Hello Bart, I am still debugging this, now that I have no_path_retry=queue and not a count :) I am often hitting the host delete race, have you seen this on your testing during debugging. I am using your kernel built from your git tree that has Mikes patches applied. 4.7.0bart [66813.896159] Hardware name: HP ProLiant DL380 G7, BIOS P67 08/16/2015 [66813.933246] Workqueue: srp_remove srp_remove_work [ib_srp] [66813.964703] 0000000000000086 00000000d185b9ce ffff88060fa03d20 ffffffff813456df [66814.007292] 0000000000000000 0000000000000000 ffff88060fa03d60 ffffffff81089fb1 [66814.049336] 0000007da067604b ffff880c01643d80 0000000000017ec0 ffff880c016447dc [66814.091725] Call Trace: [66814.104775] <IRQ> [<ffffffff813456df>] dump_stack+0x63/0x84 [66814.136507] [<ffffffff81089fb1>] __warn+0xd1/0xf0 [66814.163118] [<ffffffff8108a0ed>] warn_slowpath_null+0x1d/0x20 [66814.195409] [<ffffffff8104fd7e>] native_smp_send_reschedule+0x3e/0x40 [66814.231954] [<ffffffff810b47db>] try_to_wake_up+0x30b/0x390 [66814.263661] [<ffffffff810b4912>] default_wake_function+0x12/0x20 [66814.297713] [<ffffffff810ccb05>] __wake_up_common+0x55/0x90 [66814.330021] [<ffffffff810ccb53>] __wake_up_locked+0x13/0x20 [66814.361906] [<ffffffff81261179>] ep_poll_callback+0xb9/0x200 [66814.392784] [<ffffffff810ccb05>] __wake_up_common+0x55/0x90 [66814.424908] [<ffffffff810ccc59>] __wake_up+0x39/0x50 [66814.454327] [<ffffffff810e1f80>] wake_up_klogd_work_func+0x40/0x60 [66814.490152] [<ffffffff81177b6d>] irq_work_run_list+0x4d/0x70 [66814.523007] [<ffffffff810710d0>] ? do_flush_tlb_all+0x50/0x50 [66814.556161] [<ffffffff81177bbc>] irq_work_run+0x2c/0x30 [66814.586677] [<ffffffff8110ab5f>] flush_smp_call_function_queue+0x8f/0x160 [66814.625667] [<ffffffff8110b613>] generic_smp_call_function_single_interrupt+0x13/0x60 [66814.669276] [<ffffffff81050167>] smp_call_function_interrupt+0x27/0x40 [66814.706255] [<ffffffff816c7e9c>] call_function_interrupt+0x8c/0xa0 [66814.741406] <EOI> [<ffffffff8118e733>] ? panic+0x1ef/0x233 [66814.772851] [<ffffffff8118e72f>] ? panic+0x1eb/0x233 [66814.800207] [<ffffffff810308f8>] oops_end+0xb8/0xd0 [66814.827454] [<ffffffff8106977e>] no_context+0x13e/0x3a0 [66814.858368] [<ffffffff811f3feb>] ? __slab_free+0x9b/0x280 [66814.890365] [<ffffffff81069ace>] __bad_area_nosemaphore+0xee/0x1d0 [66814.926508] [<ffffffff81069bc4>] bad_area_nosemaphore+0x14/0x20 [66814.959939] [<ffffffff8106a269>] __do_page_fault+0x89/0x4a0 [66814.992039] [<ffffffff811f3feb>] ? __slab_free+0x9b/0x280 [66815.023052] [<ffffffff8106a6b0>] do_page_fault+0x30/0x80 [66815.053368] [<ffffffff816c8b88>] page_fault+0x28/0x30 [66815.083196] [<ffffffff814ae4e9>] ? __scsi_remove_device+0x79/0x160 [66815.117444] [<ffffffff814ae5c2>] ? __scsi_remove_device+0x152/0x160 [66815.152051] [<ffffffff814ac790>] scsi_forget_host+0x60/0x70 [66815.183939] [<ffffffff814a0137>] scsi_remove_host+0x77/0x110 [66815.216152] [<ffffffffa0677be0>] srp_remove_work+0x90/0x200 [ib_srp] [66815.253221] [<ffffffff810a2e72>] process_one_work+0x152/0x400 [66815.286221] [<ffffffff810a3765>] worker_thread+0x125/0x4b0 [66815.317313] [<ffffffff810a3640>] ? rescuer_thread+0x380/0x380 [66815.349770] [<ffffffff810a9298>] kthread+0xd8/0xf0 [66815.376082] [<ffffffff816c6b3f>] ret_from_fork+0x1f/0x40 [66815.404767] [<ffffffff810a91c0>] ? kthread_park+0x60/0x60 [66815.436448] ---[ end trace bfaf79198d0976f5 ]--- -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
