From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bart Van Assche <Bart.VanAssche@sandisk.com>
Subject: Re: [dm-devel] split scsi passthrough fields out of struct request
 V2
Date: Fri, 27 Jan 2017 17:02:05 +0000
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On Thu, 2017-01-26 at 18:22 -0700, Jens Axboe wrote:
> What's your boot device? I've been booting this on a variety of setups,
> no problems observed. It's booting my laptop, and on SCSI and SATA as
> well. What is your root drive? What is the queue depth of it?
> Controller?

The boot device in my test setup is a SATA hard disk:

# cat /proc/cmdline =A0
BOOT_IMAGE=3D/boot/vmlinuz-4.10.0-rc5-dbg+ root=3DUUID=3D60a4b064-b3ef-4d28=
-96d3-3c13ecbec43e resume=3D/dev/sda2 showopts
# ls -l /dev/disk/by-uuid/60a4b064-b3ef-4d28-96d3-3c13ecbec43e
lrwxrwxrwx 1 root root 10 Jan 27 08:43 /dev/disk/by-uuid/60a4b064-b3ef-4d28=
-96d3-3c13ecbec43e -> ../../sda1
# cat /sys/block/sda/queue/nr_requests =A0
31
# lsscsi | grep sda
[0:0:0:0] =A0=A0=A0disk =A0=A0=A0ATA =A0=A0=A0=A0=A0ST1000NM0033-9ZM GA67 =
=A0/dev/sda
# hdparm -i /dev/sda

/dev/sda:
=A0Model=3DST1000NM0033-9ZM173, FwRev=3DGA67, SerialNo=3DZ1W2HM75
=A0Config=3D{ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
=A0RawCHS=3D16383/16/63, TrkSize=3D0, SectSize=3D0, ECCbytes=3D0
=A0BuffType=3Dunknown, BuffSize=3Dunknown, MaxMultSect=3D16, MultSect=3Doff
=A0CurCHS=3D16383/16/63, CurSects=3D16514064, LBA=3Dyes, LBAsects=3D1953525=
168
=A0IORDY=3Don/off, tPIO=3D{min:120,w/IORDY:120}, tDMA=3D{min:120,rec:120}
=A0PIO modes: =A0pio0 pio1 pio2 pio3 pio4 =A0
=A0DMA modes: =A0mdma0 mdma1 mdma2 =A0
=A0UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 =A0
=A0AdvancedPM=3Dno WriteCache=3Ddisabled
=A0Drive conforms to: Unspecified: =A0ATA/ATAPI-4,5,6,7

=A0* signifies the current active mode

Bart.=