Re: [dm-devel] split scsi passthrough fields out of struct request V2

[Bart Van Assche <Bart.VanAssche@sandisk.com>]

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  
BOOT_IMAGE=/boot/vmlinuz-4.10.0-rc5-dbg+ root=UUID=60a4b064-b3ef-4d28-96d3-3c13ecbec43e resume=/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  
31
# lsscsi | grep sda
[0:0:0:0]    disk    ATA      ST1000NM0033-9ZM GA67  /dev/sda
# hdparm -i /dev/sda

/dev/sda:
 Model=ST1000NM0033-9ZM173, FwRev=GA67, SerialNo=Z1W2HM75
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=unknown, MaxMultSect=16, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=1953525168
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4  
 DMA modes:  mdma0 mdma1 mdma2  
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6  
 AdvancedPM=no WriteCache=disabled
 Drive conforms to: Unspecified:  ATA/ATAPI-4,5,6,7

 * signifies the current active mode

Bart.