On Fri, 2018-03-02 at 15:03 +0000, Don Brace wrote: > > -----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] > > k>; > > [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] > > > > > > > .org > > > > > > > ; > > > > > > > Christoph > > > > > > > Hellwig <[email protected]>; Mike Snitzer <snitzer@redhat > > > > > > > .com > > > > > > > > > > > > > > > > > > > > > > Cc: [email protected]; Hannes Reinecke <hare@sus > > > > > > > e.de > > > > > > > > ; > > > > > > > > > > > > > > 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
Unless Kashyap is not happy we need to consider getting this in to Linus now because we are seeing HPE servers that keep hanging now with the original commit now upstream. Kashyap, are you good with the v3 patchset or still concerned with performance. I was getting pretty good IOPS/sec to individual SSD drives set up as jbod devices on the megaraid_sas. With larger I/O sizes like 1MB I was getting good MB/sec and not seeing a measurable performance impact. I dont have the hardware you have to mimic your configuration. Thanks Laurence
