linux-kernel - Re: [PATCH 1/1] Drivers: scsi: storvsc: Add blist flags

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Date:	Wed, 23 Jul 2014 21:13:41 +0100
From:	Sitsofe Wheeler <sitsofe@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"K. Y. Srinivasan" <kys@...rosoft.com>, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	ohering@...e.com, apw@...onical.com, jasowang@...hat.com,
	jbottomley@...allels.com, linux-scsi@...r.kernel.org
Subject: Re: [PATCH 1/1] Drivers: scsi: storvsc: Add blist flags

On Wed, Jul 23, 2014 at 07:15:58AM -0700, Christoph Hellwig wrote:
> On Wed, Jul 23, 2014 at 03:10:28PM +0100, Sitsofe Wheeler wrote:
> > I'm not sure this alone will work - won't sdev_bflags/bflags have
> > already been built at this point?
> 
> They've been built up, but we can still or new values into it.  It looks
> fine to me from review, but if you can test it on an actualy hypverv
> setup that would be valueable feedback.

The previous patches didn't work for me with a Windows 2012 R2 host with a
3.16.0-rc6.x86_64-00076-g2f7d2ec-dirty guest. After applying
https://patchwork.kernel.org/patch/4541201 (which needed a small fixup) and
https://patchwork.kernel.org/patch/4598601 and the attached debugging output
patch here's the result I got:

hv_vmbus: registering driver hv_storvsc
scsi0 : storvsc_host_t
scsi 0:0:0:0: scsi_get_device_flags_keyed: key: 3
scsi 0:0:0:0: scsi_get_device_flags_keyed: Post SCSI_DEVINFO_GLOBAL
scsi 0:0:0:0: scsi_get_device_flags_keyed: No sdev_bflags
scsi 0:0:0:0: sdev->scsi_level: 5
scsi 0:0:0:0: Direct-Access     Msft     Virtual Disk     1.0  PQ: 0 ANSI: 4
scsi 0:0:0:0: scsi_add_lun: Have BLIST_TRY_VPD_PAGES? No
scsi 0:0:0:0: storvsc_device_configure: Added BLIST_TRY_VPD_PAGES
scsi1 : storvsc_host_t
sd 0:0:0:0: Attached scsi generic sg0 type 0
scsi 1:0:0:0: scsi_get_device_flags_keyed: key: 3
scsi 1:0:0:0: scsi_get_device_flags_keyed: Post SCSI_DEVINFO_GLOBAL
scsi 1:0:0:0: scsi_get_device_flags_keyed: No sdev_bflags
scsi 1:0:0:0: sdev->scsi_level: 5
scsi 1:0:0:0: Direct-Access     Msft     Virtual Disk     1.0  PQ: 0 ANSI: 4
scsi 1:0:0:0: scsi_add_lun: Have BLIST_TRY_VPD_PAGES? No
scsi 1:0:0:0: storvsc_device_configure: Added BLIST_TRY_VPD_PAGES
scsi 1:0:0:1: scsi_get_device_flags_keyed: key: 5
scsi 1:0:0:1: scsi_get_device_flags_keyed: Post SCSI_DEVINFO_GLOBAL
scsi 1:0:0:1: scsi_get_device_flags_keyed: No sdev_bflags
scsi 1:0:0:1: scsi_get_device_flags_keyed: key: 5
scsi 1:0:0:1: scsi_get_device_flags_keyed: Post SCSI_DEVINFO_GLOBAL
scsi 1:0:0:1: scsi_get_device_flags_keyed: No sdev_bflags
scsi 1:0:0:1: sdev->scsi_level: 0
scsi 1:0:0:1: Direct-Access     ADATA    SSD S510 120GB   5.2. PQ: 0 ANSI: 0
scsi 1:0:0:1: scsi_add_lun: Have BLIST_TRY_VPD_PAGES? No
scsi 1:0:0:1: storvsc_device_configure: Added BLIST_TRY_VPD_PAGES
scsi 1:0:0:3: scsi_get_device_flags_keyed: key: 0
scsi 1:0:0:3: scsi_get_device_flags_keyed: Post SCSI_DEVINFO_GLOBAL
scsi 1:0:0:3: scsi_get_device_flags_keyed: No sdev_bflags
scsi 1:0:0:3: sdev->scsi_level: 5
scsi 1:0:0:3: Direct-Access     Msft     Virtual Disk     1.0  PQ: 0 ANSI: 4
scsi 1:0:0:3: scsi_add_lun: Have BLIST_TRY_VPD_PAGES? No
scsi 1:0:0:3: storvsc_device_configure: Added BLIST_TRY_VPD_PAGES
sd 1:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:0: [sdb] 2097152 512-byte logical blocks: (1.07 GB/1.00 GiB)
sd 1:0:0:0: [sdb] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:0: [sdb] sd_revalidate_disk: Skipped extended inquiries
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 0f 00 00 00
sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
ata_piix 0000:00:07.1: version 2.13
sd 1:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:0: [sdb] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:0: [sdb] sd_revalidate_disk: Skipped extended inquiries
 sdb: unknown partition table
ata_piix 0000:00:07.1: Hyper-V Virtual Machine detected, ATA device ignore set
sd 1:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:0: [sdb] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:0: [sdb] sd_revalidate_disk: Skipped extended inquiries
sd 1:0:0:0: [sdb] Attached SCSI disk
sd 1:0:0:0: Attached scsi generic sg1 type 0
sd 0:0:0:0: [sda] 8388608 512-byte logical blocks: (4.29 GB/4.00 GiB)
scsi2 : ata_piix
scsi3 : ata_piix
ata1: PATA max UDMA/33 cmd 0x1f0 ctl 0x3f6 bmdma 0xffa0 irq 14
ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0xffa8 irq 15
sd 1:0:0:1: Attached scsi generic sg2 type 0
libphy: Fixed MDIO Bus: probed
hv_vmbus: registering driver hv_netvsc
sd 1:0:0:3: Attached scsi generic sg3 type 0
hv_netvsc: hv_netvsc channel opened successfully
sd 0:0:0:0: [sda] sd_revalidate_disk: Extended inquiry check...
sd 0:0:0:0: [sda] sd_revalidate_disk: Skipped extended inquiries
sd 1:0:0:1: sd_try_rc16_first: sdp->scsi_level: 0
sd 1:0:0:3: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:1: [sdc] 234441648 512-byte logical blocks: (120 GB/111 GiB)
sd 1:0:0:1: [sdc] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:1: [sdc] sd_revalidate_disk: Skipped extended inquiries
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 0f 00 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
sd 0:0:0:0: [sda] sd_revalidate_disk: Extended inquiry check...
sd 0:0:0:0: [sda] sd_revalidate_disk: Skipped extended inquiries
 sda: sda1
sd 0:0:0:0: sd_try_rc16_first: sdp->scsi_level: 5
sd 0:0:0:0: [sda] sd_revalidate_disk: Extended inquiry check...
sd 0:0:0:0: [sda] sd_revalidate_disk: Skipped extended inquiries
sd 0:0:0:0: [sda] Attached SCSI disk
sd 1:0:0:1: [sdc] Write Protect is off
sd 1:0:0:3: [sdd] 199229440 512-byte logical blocks: (102 GB/95.0 GiB)
sd 1:0:0:3: [sdd] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:3: [sdd] sd_revalidate_disk: Skipped extended inquiries
sd 1:0:0:3: [sdd] Write Protect is off
sd 1:0:0:3: [sdd] Mode Sense: 0f 00 00 00
sd 1:0:0:3: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 1:0:0:1: [sdc] Mode Sense: 0f 00 00 00
sd 1:0:0:3: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:1: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 1:0:0:3: [sdd] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:3: [sdd] sd_revalidate_disk: Skipped extended inquiries
 sdd: unknown partition table
sd 1:0:0:3: sd_try_rc16_first: sdp->scsi_level: 5
sd 1:0:0:3: [sdd] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:3: [sdd] sd_revalidate_disk: Skipped extended inquiries
sd 1:0:0:3: [sdd] Attached SCSI disk
sd 1:0:0:1: sd_try_rc16_first: sdp->scsi_level: 0
sd 1:0:0:1: [sdc] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:1: [sdc] sd_revalidate_disk: Skipped extended inquiries
 sdc: sdc1
sd 1:0:0:1: sd_try_rc16_first: sdp->scsi_level: 0
sd 1:0:0:1: [sdc] sd_revalidate_disk: Extended inquiry check...
sd 1:0:0:1: [sdc] sd_revalidate_disk: Skipped extended inquiries
ata1.00: host indicates ignore ATA devices, ignored
sd 1:0:0:1: [sdc] Attached SCSI disk
tsc: Refined TSC clocksource calibration: 3200.069 MHz

sda is a 4 GByte VHDX attached to Hyper-V's IDE interface.
sdb is a 1 GByte VHDX attached to Hyper-V's SCSI interface.
sdc is a 111.8 GByte SSD being passed through Hyper-V's SCSI interface.
sdd is a 95 GByte VHDX being passed through Hyper-V's SCSI interface.

-- 
Sitsofe | http://sucs.org/~sits/

View attachment "0001-Add-debugging-output-to-SCSI-disk-initalisation-to-t.patch" of type "text/x-diff" (9363 bytes)