On Tue, 2018-01-16 at 15:22 +0000, Don Brace wrote: > > -----Original Message----- > > From: Laurence Oberman [mailto:loberman@xxxxxxxxxx] > > Sent: Tuesday, January 16, 2018 7:29 AM > > To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>; Ming Lei <ming.lei@redhat > > .com> > > Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>; Jens Axboe <axboe@xxxxxx > > >; > > linux-block@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Mike > > Snitzer > > <snitzer@xxxxxxxxxx>; Don Brace <don.brace@xxxxxxxxxxxxx> > > Subject: Re: [PATCH 0/2] genirq/affinity: try to make sure online > > CPU is assgined > > to irq vector > > > > > > It is because of irq_create_affinity_masks(). > > > > > > That still does not answer the question. If the interrupt for a > > > queue > > > is > > > assigned to an offline CPU, then the queue should not be used and > > > never > > > raise an interrupt. That's how managed interrupts have been > > > designed. > > > > > > Thanks, > > > > > > tglx > > > > > > > > > > > > > > > > I captured a full boot log for this issue for Microsemi, I will > > send it > > to Don Brace. > > I enabled all the HPSA debug and here is snippet > > > > > > .. > > .. > > .. > > 246.751135] INFO: task systemd-udevd:413 blocked for more than > > 120 > > seconds. > > [ 246.788008] Tainted: G I 4.15.0-rc4.noming+ > > #1 > > [ 246.822380] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" > > disables this message. > > [ 246.865594] systemd-udevd D 0 413 411 0x80000004 > > [ 246.895519] Call Trace: > > [ 246.909713] ? __schedule+0x340/0xc20 > > [ 246.930236] schedule+0x32/0x80 > > [ 246.947905] schedule_timeout+0x23d/0x450 > > [ 246.970047] ? find_held_lock+0x2d/0x90 > > [ 246.991774] ? wait_for_completion_io+0x108/0x170 > > [ 247.018172] io_schedule_timeout+0x19/0x40 > > [ 247.041208] wait_for_completion_io+0x110/0x170 > > [ 247.067326] ? wake_up_q+0x70/0x70 > > [ 247.086801] hpsa_scsi_do_simple_cmd+0xc6/0x100 [hpsa] > > [ 247.114315] hpsa_scsi_do_simple_cmd_with_retry+0xb7/0x1c0 > > [hpsa] > > [ 247.146629] hpsa_scsi_do_inquiry+0x73/0xd0 [hpsa] > > [ 247.174118] hpsa_init_one+0x12cb/0x1a59 [hpsa] > > This trace comes from internally generated discovery commands. No > SCSI devices have > been presented to the SML yet. > > At this point we should be running on only one CPU. These commands > are meant to use > reply queue 0 which are tied to CPU 0. It's interesting that the > patch helps. > > However, I was wondering if you could inspect the iLo IML logs and > send the > AHS logs for inspection. > > Thanks, > Don Brace > ESC - Smart Storage > Microsemi Corporation Hello Don I took two other dl380 g7's and ran the same kernel and it hangs in the identical place. Its absolutely consistent here. I doubt all three have hardware issues. Nothing is logged of interest in the IML. Ming will have more to share on specifically why it helps. I think he sent that along to you already. Regards Laurence
