Re: [PATCH V3 1/8] scsi: hpsa: fix selection of reply queue

[Laurence Oberman <loberman@redhat.com>]

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:ming.lei@redhat.com]
> > > > > Sent: Tuesday, February 27, 2018 4:08 AM
> > > > > To: Jens Axboe <axboe@kernel.dk>; linux-block@vger.kernel.org
> > > > > ;
> > > > > Christoph
> > > > > Hellwig <hch@infradead.org>; Mike Snitzer <snitzer@redhat.com
> > > > > >
> > > > > Cc: linux-scsi@vger.kernel.org; Hannes Reinecke <hare@suse.de
> > > > > >;
> > > > > Arun Easi
> > > > > <arun.easi@cavium.com>; Omar Sandoval <osandov@fb.com>;
> > > > > Martin K
> > > > > .
> > > > > Petersen <martin.petersen@oracle.com>; James Bottomley
> > > > > <james.bottomley@hansenpartnership.com>; Christoph Hellwig <h
> > > > > ch@l
> > > > > st
> > > > > .de>;
> > > > > Don Brace <don.brace@microsemi.com>; Kashyap Desai
> > > > > <kashyap.desai@broadcom.com>; Peter Rivera <peter.rivera@broa
> > > > > dcom
> > > > > .c
> > > > > om>;
> > > > > Laurence Oberman <loberman@redhat.com>; Ming Lei
> > > > > <ming.lei@redhat.com>; Meelis Roos <mroos@linux.ee>
> > > > > Subject: [PATCH V3 1/8] scsi: hpsa: fix selection of reply
> > > > > queue
> > > > > 
> > > > > EXTERNAL EMAIL
> > > > > 
> > > > > 
> > > > > From 84676c1f21 (genirq/affinity: assign vectors to all
> > > > > possible
> > > > > CPUs),
> > > > > one msix vector can be created without any online CPU mapped,
> > > > > then
> > > > > one
> > > > > command's completion may not be notified.
> > > > > 
> > > > > This patch setups mapping between cpu and reply queue
> > > > > according
> > > > > to
> > > > > irq
> > > > > affinity info retrived by pci_irq_get_affinity(), and uses
> > > > > this
> > > > > mapping
> > > > > table to choose reply queue for queuing one command.
> > > > > 
> > > > > Then the chosen reply queue has to be active, and fixes IO
> > > > > hang
> > > > > caused
> > > > > by using inactive reply queue which doesn't have any online
> > > > > CPU
> > > > > mapped.
> > > > > 
> > > > > Cc: Hannes Reinecke <hare@suse.de>
> > > > > Cc: Arun Easi <arun.easi@cavium.com>
> > > > > Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
> > > > > Cc: James Bottomley <james.bottomley@hansenpartnership.com>,
> > > > > Cc: Christoph Hellwig <hch@lst.de>,
> > > > > Cc: Don Brace <don.brace@microsemi.com>
> > > > > Cc: Kashyap Desai <kashyap.desai@broadcom.com>
> > > > > Cc: Peter Rivera <peter.rivera@broadcom.com>
> > > > > Cc: Laurence Oberman <loberman@redhat.com>
> > > > > Cc: Meelis Roos <mroos@linux.ee>
> > > > > Fixes: 84676c1f21e8 ("genirq/affinity: assign vectors to all
> > > > > possible CPUs")
> > > > > Signed-off-by: Ming Lei <ming.lei@redhat.com>
> > > > 
> > > > I am getting some issues that need to be tracked down:
> > > > 
> > > > [ 1636.032984] hpsa 0000:87:00.0: Acknowledging event:
> > > > 0xc0000032
> > > > (HP
> > > > SSD Smart Path configuration change)
> > > > [ 1638.510656] hpsa 0000:87:00.0: scsi 3:0:8:0: updated Direct-
> > > > Access     HP       MO0400JDVEU      PHYS DRV SSDSmartPathCap-
> > > > En-
> > > > Exp=0
> > > > [ 1653.967695] hpsa 0000:87:00.0: Acknowledging event:
> > > > 0x80000020
> > > > (HP
> > > > SSD Smart Path configuration change)
> > > > [ 1656.770377] hpsa 0000:87:00.0: scsi 3:0:8:0: updated Direct-
> > > > Access     HP       MO0400JDVEU      PHYS DRV SSDSmartPathCap-
> > > > En-
> > > > Exp=0
> > > > [ 2839.762267] hpsa 0000:87:00.0: Acknowledging event:
> > > > 0x80000020
> > > > (HP
> > > > SSD Smart Path configuration change)
> > > > [ 2840.841290] hpsa 0000:87:00.0: scsi 3:0:8:0: updated Direct-
> > > > Access     HP       MO0400JDVEU      PHYS DRV SSDSmartPathCap-
> > > > En-
> > > > Exp=0
> > > > [ 2917.582653] hpsa 0000:87:00.0: Acknowledging event:
> > > > 0xc0000020
> > > > (HP
> > > > SSD Smart Path configuration change)
> > > > [ 2919.087191] hpsa 0000:87:00.0: scsi 3:1:0:1: updated Direct-
> > > > Access     HP       LOGICAL VOLUME   RAID-5 SSDSmartPathCap+
> > > > En+
> > > > Exp=1
> > > > [ 2919.142527] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 2919.203915] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 2919.266921] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 2934.999629] hpsa 0000:87:00.0: Acknowledging event:
> > > > 0x40000000
> > > > (HP
> > > > SSD Smart Path state change)
> > > > [ 2936.937333] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 2936.998707] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 2937.060101] hpsa 0000:87:00.0: hpsa_figure_phys_disk_ptrs:
> > > > [3:1:0:2] A phys disk component of LV is missing, turning off
> > > > offload_enabled for LV.
> > > > [ 3619.711122] sd 3:1:0:3: [sde] tag#436 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3619.751150] sd 3:1:0:3: [sde] tag#436 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3619.784375] sd 3:1:0:3: [sde] tag#436 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3619.816530] sd 3:1:0:3: [sde] tag#436 CDB: Read(10) 28 00 01
> > > > 1b
> > > > ad
> > > > af 00 00 01 00
> > > > [ 3619.852295] print_req_error: I/O error, dev sde, sector
> > > > 18591151
> > > > [ 3619.880850] sd 3:1:0:3: [sde] tag#461 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3619.920981] sd 3:1:0:3: [sde] tag#461 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3619.955081] sd 3:1:0:3: [sde] tag#461 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3619.987054] sd 3:1:0:3: [sde] tag#461 CDB: Read(10) 28 00 02
> > > > 15
> > > > 31
> > > > 40 00 00 01 00
> > > > [ 3620.022569] print_req_error: I/O error, dev sde, sector
> > > > 34943296
> > > > [ 3620.050873] sd 3:1:0:3: [sde] tag#157 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.091124] sd 3:1:0:3: [sde] tag#157 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.124179] sd 3:1:0:3: [sde] tag#157 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.156203] sd 3:1:0:3: [sde] tag#157 CDB: Read(10) 28 00 03
> > > > 65
> > > > 9d
> > > > 7e 00 00 01 00
> > > > [ 3620.191520] print_req_error: I/O error, dev sde, sector
> > > > 56991102
> > > > [ 3620.220308] sd 3:1:0:3: [sde] tag#266 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.260273] sd 3:1:0:3: [sde] tag#266 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.294605] sd 3:1:0:3: [sde] tag#266 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.328353] sd 3:1:0:3: [sde] tag#266 CDB: Read(10) 28 00 09
> > > > 92
> > > > 94
> > > > 70 00 00 01 00
> > > > [ 3620.364807] print_req_error: I/O error, dev sde, sector
> > > > 160601200
> > > > [ 3620.394342] sd 3:1:0:3: [sde] tag#278 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.434462] sd 3:1:0:3: [sde] tag#278 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.469059] sd 3:1:0:3: [sde] tag#278 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.471761] sd 3:1:0:3: [sde] tag#467 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.502240] sd 3:1:0:3: [sde] tag#278 CDB: Read(10) 28 00 08
> > > > 00
> > > > 12
> > > > ea 00 00 01 00
> > > > [ 3620.543157] sd 3:1:0:3: [sde] tag#467 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.580375] print_req_error: I/O error, dev sde, sector
> > > > 134222570
> > > > [ 3620.615355] sd 3:1:0:3: [sde] tag#467 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.645069] sd 3:1:0:3: [sde] tag#244 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.678696] sd 3:1:0:3: [sde] tag#467 CDB: Read(10) 28 00 10
> > > > 3f
> > > > 2b
> > > > fc 00 00 01 00
> > > > [ 3620.720247] sd 3:1:0:3: [sde] tag#244 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.756776] print_req_error: I/O error, dev sde, sector
> > > > 272575484
> > > > [ 3620.791857] sd 3:1:0:3: [sde] tag#244 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.822272] sd 3:1:0:3: [sde] tag#431 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3620.855200] sd 3:1:0:3: [sde] tag#244 CDB: Read(10) 28 00 08
> > > > 31
> > > > 86
> > > > d9 00 00 01 00
> > > > [ 3620.895823] sd 3:1:0:3: [sde] tag#431 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3620.931923] print_req_error: I/O error, dev sde, sector
> > > > 137463513
> > > > [ 3620.966262] sd 3:1:0:3: [sde] tag#431 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3620.995715] sd 3:1:0:3: [sde] tag#226 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3621.028703] sd 3:1:0:3: [sde] tag#431 CDB: Read(10) 28 00 10
> > > > 7c
> > > > b2
> > > > b0 00 00 01 00
> > > > [ 3621.069686] sd 3:1:0:3: [sde] tag#226 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3621.106253] print_req_error: I/O error, dev sde, sector
> > > > 276607664
> > > > [ 3621.140782] sd 3:1:0:3: [sde] tag#226 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3621.170241] sd 3:1:0:3: [sde] tag#408 FAILED Result:
> > > > hostbyte=DID_OK driverbyte=DRIVER_SENSE
> > > > [ 3621.202997] sd 3:1:0:3: [sde] tag#226 CDB: Read(10) 28 00 08
> > > > ba
> > > > cf
> > > > f2 00 00 01 00
> > > > [ 3621.243870] sd 3:1:0:3: [sde] tag#408 Sense Key : Aborted
> > > > Command
> > > > [current] 
> > > > [ 3621.280015] print_req_error: I/O error, dev sde, sector
> > > > 146460658
> > > > [ 3621.313941] sd 3:1:0:3: [sde] tag#408 Add. Sense: Internal
> > > > target
> > > > failure
> > > > [ 3621.343790] print_req_error: I/O error, dev sde, sector
> > > > 98830586
> > > > [ 3621.376164] sd 3:1:0:3: [sde] tag#408 CDB: Read(10) 28 00 14
> > > > da
> > > > 6a
> > > > 53 00 00 01 00
> > > > [ 3641.714842] WARNING: CPU: 3 PID: 0 at kernel/rcu/tree.c:2713
> > > > rcu_process_callbacks+0x4d5/0x510
> > > > [ 3641.756175] Modules linked in: sg ip6t_rpfilter ip6t_REJECT
> > > > nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT
> > > > nf_reject_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
> > > > nf_conntrack cfg80211 rfkill ebtable_nat ebtable_broute bridge
> > > > stp
> > > > llc ebtable_filter ebtables ip6table_mangle ip6table_security
> > > > ip6table_raw ip6table_filter ip6_tables iptable_mangle
> > > > iptable_security iptable_raw iptable_filter ip_tables sb_edac
> > > > x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass
> > > > crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc iTCO_wdt
> > > > iTCO_vendor_support aesni_intel crypto_simd glue_helper cryptd
> > > > pcspkr
> > > > hpilo hpwdt ioatdma shpchp ipmi_si lpc_ich dca mfd_core wmi
> > > > ipmi_msghandler acpi_power_meter pcc_cpufreq uinput xfs
> > > > libcrc32c
> > > > mgag200 i2c_algo_bit drm_kms_helper sd_mod syscopyarea
> > > > sysfillrect
> > > > [ 3642.094993]  sysimgblt fb_sys_fops ttm drm crc32c_intel
> > > > i2c_core
> > > > tg3 hpsa scsi_transport_sas usb_storage dm_mirror
> > > > dm_region_hash
> > > > dm_log dm_mod dax
> > > > [ 3642.158883] CPU: 3 PID: 0 Comm: swapper/3 Not tainted
> > > > 4.16.0-
> > > > rc3+
> > > > #18
> > > > [ 3642.190015] Hardware name: HP ProLiant DL580 Gen8, BIOS P79
> > > > 08/18/2016
> > > > [ 3642.221949] RIP: 0010:rcu_process_callbacks+0x4d5/0x510
> > > > [ 3642.247606] RSP: 0018:ffff8e179f6c3f08 EFLAGS: 00010002
> > > > [ 3642.273087] RAX: 0000000000000000 RBX: ffff8e179f6e3180 RCX:
> > > > ffff8e279d1e8918
> > > > [ 3642.307426] RDX: ffffffffffffd801 RSI: ffff8e179f6c3f18 RDI:
> > > > ffff8e179f6e31b8
> > > > [ 3642.342219] RBP: ffffffffb70a31c0 R08: ffff8e279d1e8918 R09:
> > > > 0000000000000100
> > > > [ 3642.376929] R10: 0000000000000004 R11: 0000000000000005 R12:
> > > > ffff8e179f6e31b8
> > > > [ 3642.411598] R13: ffff8e179d20ad00 R14: 0000000000000001 R15:
> > > > 7fffffffffffffff
> > > > [ 3642.445957] FS:  0000000000000000(0000)
> > > > GS:ffff8e179f6c0000(0000)
> > > > knlGS:0000000000000000
> > > > [ 3642.485599] CS:  0010 DS: 0000 ES: 0000 CR0:
> > > > 0000000080050033
> > > > [ 3642.513678] CR2: 00007f30917b9008 CR3: 000000054900a006 CR4:
> > > > 00000000001606e0
> > > > [ 3642.548189] Call Trace:
> > > > [ 3642.560411]  <IRQ>
> > > > [ 3642.570588]  __do_softirq+0xd1/0x275
> > > > [ 3642.588643]  irq_exit+0xd5/0xe0
> > > > [ 3642.604134]  smp_apic_timer_interrupt+0x60/0x120
> > > > [ 3642.626752]  apic_timer_interrupt+0xf/0x20
> > > > [ 3642.646712]  </IRQ>
> > > > [ 3642.657330] RIP: 0010:cpuidle_enter_state+0xd4/0x260
> > > > [ 3642.681389] RSP: 0018:ffffaed7c00e7ea0 EFLAGS: 00000246
> > > > ORIG_RAX:
> > > > ffffffffffffff12
> > > > [ 3642.717937] RAX: ffff8e179f6e2280 RBX: ffffcebfbfec1bb8 RCX:
> > > > 000000000000001f
> > > > [ 3642.752525] RDX: 0000000000000000 RSI: ff6c3b1b90a53a78 RDI:
> > > > 0000000000000000
> > > > [ 3642.787181] RBP: 0000000000000003 R08: 0000000000000005 R09:
> > > > 0000000000000396
> > > > [ 3642.821442] R10: 00000000000003a7 R11: 0000000000000008 R12:
> > > > 0000000000000003
> > > > [ 3642.856381] R13: 0000034fe70ea52c R14: 0000000000000003 R15:
> > > > 0000034fe71d99d4
> > > > [ 3642.890830]  do_idle+0x172/0x1e0
> > > > [ 3642.906714]  cpu_startup_entry+0x6f/0x80
> > > > [ 3642.925835]  start_secondary+0x187/0x1e0
> > > > [ 3642.944975]  secondary_startup_64+0xa5/0xb0
> > > > [ 3642.965719] Code: e9 db fd ff ff 4c 89 f6 4c 89 e7 e8 96 b8
> > > > 63
> > > > 00
> > > > e9 56 fc ff ff 0f 0b e9 34 fc ff ff 0f 0b 0f 1f 84 00 00 00 00
> > > > 00
> > > > e9
> > > > e0 fb ff ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 e9 e5 fd ff ff
> > > > 0f 0b
> > > > 66 0f 1f 
> > > > [ 3643.056198] ---[ end trace 7bdac969b3138de7 ]---
> > > > [ 3735.745955] hpsa 0000:87:00.0: SCSI status:
> > > > LUN:000000c000002601
> > > > CDB:12010000040000000000000000000000
> > > > [ 3735.790497] hpsa 0000:87:00.0: SCSI Status = 02, Sense key =
> > > > 0x05,
> > > > ASC = 0x25, ASCQ = 0x00
> > > > > ---
> > > > >  drivers/scsi/hpsa.c | 73
> > > > > +++++++++++++++++++++++++++++++++++++++
> > > > > --------------
> > > > >  drivers/scsi/hpsa.h |  1 +
> > > > >  2 files changed, 55 insertions(+), 19 deletions(-)
> > > > > 
> > > > > diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> > > > > index 5293e6827ce5..3a9eca163db8 100644
> > > > > --- a/drivers/scsi/hpsa.c
> > > > > +++ b/drivers/scsi/hpsa.c
> > > > > @@ -1045,11 +1045,7 @@ static void set_performant_mode(struct
> > > > > ctlr_info
> > > > > *h, struct CommandList *c,
> > > > >                 c->busaddr |= 1 | (h->blockFetchTable[c-
> > > > > > Header.SGList] << 1);
> > > > > 
> > > > >                 if (unlikely(!h->msix_vectors))
> > > > >                         return;
> > > > > -               if (likely(reply_queue ==
> > > > > DEFAULT_REPLY_QUEUE))
> > > > > -                       c->Header.ReplyQueue =
> > > > > -                               raw_smp_processor_id() % h-
> > > > > > nreply_queues;
> > > > > 
> > > > > -               else
> > > > > -                       c->Header.ReplyQueue = reply_queue %
> > > > > h-
> > > > > > nreply_queues;
> > > > > 
> > > > > +               c->Header.ReplyQueue = reply_queue;
> > > > >         }
> > > > >  }
> > > > > 
> > > > > @@ -1063,10 +1059,7 @@ static void
> > > > > set_ioaccel1_performant_mode(struct
> > > > > ctlr_info *h,
> > > > >          * Tell the controller to post the reply to the queue
> > > > > for
> > > > > this
> > > > >          * processor.  This seems to give the best I/O
> > > > > throughput.
> > > > >          */
> > > > > -       if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
> > > > > -               cp->ReplyQueue = smp_processor_id() % h-
> > > > > > nreply_queues;
> > > > > 
> > > > > -       else
> > > > > -               cp->ReplyQueue = reply_queue % h-
> > > > > >nreply_queues;
> > > > > +       cp->ReplyQueue = reply_queue;
> > > > >         /*
> > > > >          * Set the bits in the address sent down to include:
> > > > >          *  - performant mode bit (bit 0)
> > > > > @@ -1087,10 +1080,7 @@ static void
> > > > > set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
> > > > >         /* Tell the controller to post the reply to the queue
> > > > > for
> > > > > this
> > > > >          * processor.  This seems to give the best I/O
> > > > > throughput.
> > > > >          */
> > > > > -       if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
> > > > > -               cp->reply_queue = smp_processor_id() % h-
> > > > > > nreply_queues;
> > > > > 
> > > > > -       else
> > > > > -               cp->reply_queue = reply_queue % h-
> > > > > >nreply_queues;
> > > > > +       cp->reply_queue = reply_queue;
> > > > >         /* Set the bits in the address sent down to include:
> > > > >          *  - performant mode bit not used in ioaccel mode 2
> > > > >          *  - pull count (bits 0-3)
> > > > > @@ -1109,10 +1099,7 @@ static void
> > > > > set_ioaccel2_performant_mode(struct
> > > > > ctlr_info *h,
> > > > >          * Tell the controller to post the reply to the queue
> > > > > for
> > > > > this
> > > > >          * processor.  This seems to give the best I/O
> > > > > throughput.
> > > > >          */
> > > > > -       if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
> > > > > -               cp->reply_queue = smp_processor_id() % h-
> > > > > > nreply_queues;
> > > > > 
> > > > > -       else
> > > > > -               cp->reply_queue = reply_queue % h-
> > > > > >nreply_queues;
> > > > > +       cp->reply_queue = reply_queue;
> > > > >         /*
> > > > >          * Set the bits in the address sent down to include:
> > > > >          *  - performant mode bit not used in ioaccel mode 2
> > > > > @@ -1157,6 +1144,8 @@ static void
> > > > > __enqueue_cmd_and_start_io(struct
> > > > > ctlr_info *h,
> > > > >  {
> > > > >         dial_down_lockup_detection_during_fw_flash(h, c);
> > > > >         atomic_inc(&h->commands_outstanding);
> > > > > +
> > > > > +       reply_queue = h->reply_map[raw_smp_processor_id()];
> > > > >         switch (c->cmd_type) {
> > > > >         case CMD_IOACCEL1:
> > > > >                 set_ioaccel1_performant_mode(h, c,
> > > > > reply_queue);
> > > > > @@ -7376,6 +7365,26 @@ static void
> > > > > hpsa_disable_interrupt_mode(struct
> > > > > ctlr_info *h)
> > > > >         h->msix_vectors = 0;
> > > > >  }
> > > > > 
> > > > > +static void hpsa_setup_reply_map(struct ctlr_info *h)
> > > > > +{
> > > > > +       const struct cpumask *mask;
> > > > > +       unsigned int queue, cpu;
> > > > > +
> > > > > +       for (queue = 0; queue < h->msix_vectors; queue++) {
> > > > > +               mask = pci_irq_get_affinity(h->pdev, queue);
> > > > > +               if (!mask)
> > > > > +                       goto fallback;
> > > > > +
> > > > > +               for_each_cpu(cpu, mask)
> > > > > +                       h->reply_map[cpu] = queue;
> > > > > +       }
> > > > > +       return;
> > > > > +
> > > > > +fallback:
> > > > > +       for_each_possible_cpu(cpu)
> > > > > +               h->reply_map[cpu] = 0;
> > > > > +}
> > > > > +
> > > > >  /* If MSI/MSI-X is supported by the kernel we will try to
> > > > > enable
> > > > > it on
> > > > >   * controllers that are capable. If not, we use legacy INTx
> > > > > mode.
> > > > >   */
> > > > > @@ -7771,6 +7780,10 @@ static int hpsa_pci_init(struct
> > > > > ctlr_info
> > > > > *h)
> > > > >         err = hpsa_interrupt_mode(h);
> > > > >         if (err)
> > > > >                 goto clean1;
> > > > > +
> > > > > +       /* setup mapping between CPU and reply queue */
> > > > > +       hpsa_setup_reply_map(h);
> > > > > +
> > > > >         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
> > > > >         if (err)
> > > > >                 goto clean2;    /* intmode+region, pci */
> > > > > @@ -8480,6 +8493,28 @@ static struct workqueue_struct
> > > > > *hpsa_create_controller_wq(struct ctlr_info *h,
> > > > >         return wq;
> > > > >  }
> > > > > 
> > > > > +static void hpda_free_ctlr_info(struct ctlr_info *h)
> > > > > +{
> > > > > +       kfree(h->reply_map);
> > > > > +       kfree(h);
> > > > > +}
> > > > > +
> > > > > +static struct ctlr_info *hpda_alloc_ctlr_info(void)
> > > > > +{
> > > > > +       struct ctlr_info *h;
> > > > > +
> > > > > +       h = kzalloc(sizeof(*h), GFP_KERNEL);
> > > > > +       if (!h)
> > > > > +               return NULL;
> > > > > +
> > > > > +       h->reply_map = kzalloc(sizeof(*h->reply_map) *
> > > > > nr_cpu_ids,
> > > > > GFP_KERNEL);
> > > > > +       if (!h->reply_map) {
> > > > > +               kfree(h);
> > > > > +               return NULL;
> > > > > +       }
> > > > > +       return h;
> > > > > +}
> > > > > +
> > > > >  static int hpsa_init_one(struct pci_dev *pdev, const struct
> > > > > pci_device_id *ent)
> > > > >  {
> > > > >         int dac, rc;
> > > > > @@ -8517,7 +8552,7 @@ static int hpsa_init_one(struct pci_dev
> > > > > *pdev, const
> > > > > struct pci_device_id *ent)
> > > > >          * the driver.  See comments in hpsa.h for more info.
> > > > >          */
> > > > >         BUILD_BUG_ON(sizeof(struct CommandList) %
> > > > > COMMANDLIST_ALIGNMENT);
> > > > > -       h = kzalloc(sizeof(*h), GFP_KERNEL);
> > > > > +       h = hpda_alloc_ctlr_info();
> > > > >         if (!h) {
> > > > >                 dev_err(&pdev->dev, "Failed to allocate
> > > > > controller
> > > > > head\n");
> > > > >                 return -ENOMEM;
> > > > > @@ -8916,7 +8951,7 @@ static void hpsa_remove_one(struct
> > > > > pci_dev
> > > > > *pdev)
> > > > >         h->lockup_detected = NULL;                      /*
> > > > > init_one
> > > > > 2 */
> > > > >         /* (void) pci_disable_pcie_error_reporting(pdev);
> > > > > */    /*
> > > > > init_one 1 */
> > > > > 
> > > > > -       kfree(h);                                       /*
> > > > > init_one
> > > > > 1 */
> > > > > +       hpda_free_ctlr_info(h);                         /*
> > > > > init_one
> > > > > 1 */
> > > > >  }
> > > > > 
> > > > >  static int hpsa_suspend(__attribute__((unused)) struct
> > > > > pci_dev
> > > > > *pdev,
> > > > > diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
> > > > > index 018f980a701c..fb9f5e7f8209 100644
> > > > > --- a/drivers/scsi/hpsa.h
> > > > > +++ b/drivers/scsi/hpsa.h
> > > > > @@ -158,6 +158,7 @@ struct bmic_controller_parameters {
> > > > >  #pragma pack()
> > > > > 
> > > > >  struct ctlr_info {
> > > > > +       unsigned int *reply_map;
> > > > >         int     ctlr;
> > > > >         char    devname[8];
> > > > >         char    *product_name;
> > > > > --
> > > > > 2.9.5
> > > > 
> > > > 
> > > 
> > > I have a DL580 here with the following:
> > > 
> > > Ming's latest tree
> > > 4.16.0-rc2.ming+
> > > 
> > > 3:00.0 RAID bus controller: Hewlett-Packard Company Smart Array
> > > G6
> > > controllers (rev 01) P410i
> > > 
> > > /dev/sg0  1 0 0 0  12  HP        P410i             6.60
> > > /dev/sg1  1 1 0 0  0  /dev/sda  HP        LOGICAL VOLUME    6.60
> > > Boot volume
> > > 
> > > /dev/sg2  1 1 0 1  0  /dev/sdb  HP        LOGICAL VOLUME    6.60
> > > Single disk
> > > 
> > > /dev/sg3  1 1 0 2  0  /dev/sdc  HP        LOGICAL VOLUME    6.60
> > >  
> > > 2 Disk Mirror
> > > 
> > > 
> > > MSA50 Shelf at 6GB, all Jbods
> > > 
> > > 0e:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID
> > > SAS
> > > 2208 [Thunderbolt] (rev 03)
> > > 
> > > /dev/sg4  0 0 43 0  0  /dev/sdd  HP        DG072A9BB7        HPD0
> > > /dev/sg5  0 0 44 0  0  /dev/sde  HP        DG146BABCF        HPD5
> > > /dev/sg6  0 0 45 0  0  /dev/sdf  HP        DG146BABCF        HPD6
> > > /dev/sg7  0 0 46
> > > 0  0  /dev/sdg  HP        EG0146FAWHU       HPDE   
> > > /dev/sg8  0 0 47 0  0  /dev/sdh  HP        EG0146FAWHU       HPDD
> > > /dev/sg9  0 0 48 0  0  /dev/sdi  HP        EG0146FAWHU       HPDE
> > > /dev/sg10  0 0 49 0  0  /dev/sdj  ATA       OCZ-
> > > VERTEX4       1.5 
> > > /dev/sg11  0 0 50 0  0  /dev/sdk  ATA       OCZ-
> > > VERTEX4       1.5 
> > > /dev/sg12  0 0 51 0  0  /dev/sdl  ATA       INTEL
> > > SSDSC2BW08  DC32
> > > /dev/sg13  0 0 52 0  13  HP        MSA50  -10D25G1   1.20
> > > 
> > > I have multiple boot passes on the HPSA all passing, and have not
> > > had
> > > any access issues with Ming's patches to the megaraid_sas drives
> > > 
> > > I dont have the decent SSD hardware to test performance on the
> > > megaraid_sas to match Kashyap unfortunately.
> > > 
> > > What I can say is that so far all boot testing has passed.
> > > 
> > > I will exercise all the drives now to see if I can bring about
> > > any
> > > issues seen by Don
> > > 
> > > Thanks
> > > Laurence
> > 
> > Don,
> > 
> > I am not seeing any issues with Ming's V3
> > 
> > So Ming's latest V3 is rock solid for me through multiple fio runs
> > on
> > the DL580 here.
> > On both megaraid_sas and hpsa
> > 
> > Using
> > 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 scsi_mod.use_blk_mq=y dm_mod.use_blk_mq=y
> 
> Hi Laurence,
> 
> Thanks for your test!
> 
> 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