On Sat, Apr 16, 2016 at 09:25:13AM -0700, James Bottomley wrote: > On Sat, 2016-04-16 at 09:08 -0700, Greg KH wrote: > > On Sat, Apr 09, 2016 at 08:18:26PM +1000, Brian Chadwick wrote: > > > On 09/04/16 00:24, Greg KH wrote: > > > > On Fri, Apr 08, 2016 at 07:37:12PM +1000, Brian Chadwick wrote: > > > > > On 08/04/16 01:59, Greg KH wrote: > > > > > > On Fri, Apr 08, 2016 at 01:34:51AM +1000, Brian Chadwick > > > > > > wrote: > > > > > > > On 08/04/16 00:44, Greg KH wrote: > > > > > > > > On Thu, Apr 07, 2016 at 03:04:55PM +1000, Brian Chadwick > > > > > > > > wrote: > > > > > > > > > On 06/04/16 19:53, Greg KH wrote: > > > > > > > > > > On Tue, Apr 05, 2016 at 06:42:51PM +1000, Brian > > > > > > > > > > Chadwick wrote: > > > > > > > > > > > SETUP: > > > > > > > > > > > > > > > > > > > > > > i7 16GB Computer. > > > > > > > > > > > > > > > > > > > > > > 1 x PCI-x USB3 adaptor card (i think uses xhci > > > > > > > > > > > -hcd)04:00.0 USB controller: > > > > > > > > > > > Renesas Technology Corp. uPD720202 USB 3.0 Host > > > > > > > > > > > Controller (rev 02) > > > > > > > > > > > Kernel driver in use: xhci_hcd > > > > > > > > > > > > > > > > > > > > > > 2 x USB3 to dual SATA HDD docks. uses JMicron > > > > > > > > > > > JMS56x Series controllers, > > > > > > > > > > > uses uas.ko kernel module > > > > > > > > > > > Bus 004 Device 002: ID 152d:9561 JMicron Technology > > > > > > > > > > > Corp. / JMicron USA > > > > > > > > > > > Technology Corp. > > > > > > > > > > > Bus 004 Device 003: ID 152d:9561 JMicron Technology > > > > > > > > > > > Corp. / JMicron USA > > > > > > > > > > > Technology Corp. > > > > > > > > > > > > > > > > > > > > > > 3 x Western Digital 320GB 3.5" SATA drives > > > > > > > > > > > > > > > > > > > > > > USE: > > > > > > > > > > > > > > > > > > > > > > RAID 5 > > > > > > > > > > > > > > > > > > > > > > KERNEL: > > > > > > > > > > > 4.3.5 > > > > > > > > > > > > > > > > > > > > > > System works perfectly as expected. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Change to kernel 4.4.x or 4.5 and RAID 5 doesnt > > > > > > > > > > > work. I am not sure whether > > > > > > > > > > > its actually RAID 5 at fault or if its the USB > > > > > > > > > > > Attached SCSI driver uas.ko, > > > > > > > > > > > or maybe the host driver xhci-hcd. > > > > > > > > > > Can you run 'git bisect' to try to track down the > > > > > > > > > > offending commit? > > > > <instructions about git-bisect snipped> > > > > > Hi, well to my surprise git bisect has come up with a commit about > > > which I > > > had no inkling. I may have to go to another mailing list it doesnt > > > look like > > > a usb problem. > > > > > > This is the final output of 'git bisect view' : > > > > > > > > > commit 64d513ac31bd02a3c9b69ef04444f36c196f9a9d > > > Author: Christoph Hellwig <hch@xxxxxx> > > > Date: Thu Oct 8 09:28:04 2015 +0100 > > > > > > scsi: use host wide tags by default > > > > > > This patch changes the !blk-mq path to the same defaults as the > > > blk-mq > > > I/O path by always enabling block tagging, and always using > > > host wide > > > tags. We've had blk-mq available for a few releases so bugs > > > with > > > this mode should have been ironed out, and this ensures we get > > > better > > > coverage of over tagging setup over different configs. > > > > > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > > > Acked-by: Jens Axboe <axboe@xxxxxxxxx> > > > Reviewed-by: Hannes Reinecke <hare@xxxxxxx> > > > Signed-off-by: James Bottomley <JBottomley@xxxxxxxx> > > > > > > > > > > > > Thank you for your help in narrowing this down, and in educating me > > > about > > > git bisect (its a neat tool) ... I await your advice as how to > > > proceed from > > > here. > > > > Sorry for the delay, nice work tracking down the problem. > > > > Christoph, any ideas? This patch is breaking this user's system as > > described above. Is there a more recent fix for this, or did > > something > > forget to get changed in the large patch you did here? > > If this is UAS connected devices, then this is likely the fix: > > http://marc.info/?l=linux-scsi&m=146045685829613 Ah, nice, it's planned to go to Linus later today... Brian, can you test that patch out to see if it resolves your issue or not? thanks, greg k-h -- 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
