> -----Original Message-----
> From: Laurence Oberman [mailto:[email protected]]
> Sent: Friday, March 02, 2018 8:09 AM
> To: Ming Lei <[email protected]>
> Cc: Don Brace <[email protected]>; Jens Axboe <[email protected]>;
> [email protected]; Christoph Hellwig <[email protected]>; Mike
> Snitzer <[email protected]>; [email protected]; Hannes Reinecke
> <[email protected]>; Arun Easi <[email protected]>; Omar Sandoval
> <[email protected]>; Martin K . Petersen <[email protected]>; James
> Bottomley <[email protected]>; Christoph Hellwig
> <[email protected]>; Kashyap Desai <[email protected]>; Peter Rivera
> <[email protected]>; Meelis Roos <[email protected]>
> Subject: Re: [PATCH V3 1/8] scsi: hpsa: fix selection of reply queue
> 
> EXTERNAL EMAIL
> 
> 
> On Fri, 2018-03-02 at 10:16 +0800, Ming Lei wrote:
> > On Thu, Mar 01, 2018 at 04:19:34PM -0500, Laurence Oberman wrote:
> > > On Thu, 2018-03-01 at 14:01 -0500, Laurence Oberman wrote:
> > > > On Thu, 2018-03-01 at 16:18 +0000, Don Brace wrote:
> > > > > > -----Original Message-----
> > > > > > From: Ming Lei [mailto:[email protected]]
> > > > > > Sent: Tuesday, February 27, 2018 4:08 AM
> > > > > > To: Jens Axboe <[email protected]>; [email protected]
> > > > > > ;
> > > > > > Christoph
> > > > > > Hellwig <[email protected]>; Mike Snitzer <[email protected]
> > > > > > >
> > > > > > Cc: [email protected]; Hannes Reinecke <[email protected]
> > > > > > >;
> > > > > > Arun Easi
> > > > > > <[email protected]>; Omar Sandoval <[email protected]>;
> > > > > > Martin K
> > > > > > .
> > > > > > Petersen <[email protected]>; James Bottomley
> > > > > > <[email protected]>; Christoph Hellwig <h
> > > > > > ch@l
> > > > > > st
> > > > > > .de>;
> > > > > > Don Brace <[email protected]>; Kashyap Desai
> > > > > > <[email protected]>; Peter Rivera <peter.rivera@broa
> > > > > > dcom
> > > > > > .c
> > > > > > om>;
> > > > > > Laurence Oberman <[email protected]>; Ming Lei
> > > > > > <[email protected]>; Meelis Roos <[email protected]>
> > > > > > Subject: [PATCH V3 1/8] scsi: hpsa: fix selection of reply
> > > > > > queue
> > > > > >
> > Seems Don run into IO failure without blk-mq, could you run your
> > tests again
> > in legacy mode?
> >
> > Thanks,
> > Ming
> 
> Hello Ming
> I ran multiple passes on Legacy and still see no issues in my test bed
> 
> BOOT_IMAGE=/vmlinuz-4.16.0-rc2.ming+ root=UUID=43f86d71-b1bf-4789-
> a28e-
> 21c6ddc90195 ro crashkernel=256M@64M log_buf_len=64M
> console=ttyS1,115200n8
> 
> HEAD of the git kernel I am using
> 
> 694e16f scsi: megaraid: improve scsi_mq performance via .host_tagset
> 793686c scsi: hpsa: improve scsi_mq performance via .host_tagset
> 60d5b36 block: null_blk: introduce module parameter of 'g_host_tags'
> 8847067 scsi: Add template flag 'host_tagset'
> a8fbdd6 blk-mq: introduce BLK_MQ_F_HOST_TAGS
> 4710fab blk-mq: introduce 'start_tag' field to 'struct blk_mq_tags'
> 09bb153 scsi: megaraid_sas: fix selection of reply queue
> 52700d8 scsi: hpsa: fix selection of reply queue

I checkout out Linus's tree (4.16.0-rc3+) and re-applied the above patches.
I  and have been running 24 hours with no issues.
Evidently my forked copy was corrupted. 

So, my I/O testing has gone well. 

I'll run some performance numbers next.

Thanks,
Don

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