lkml.org 
[lkml]   [2014]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] Drivers: scsi: storvsc: Add blist flags
On Mon, Jul 21, 2014 at 04:06:01PM -0700, K. Y. Srinivasan wrote:
> Add blist flags to permit the reading of the VPD pages even when
> the target may claim SPC-2 compliance. MSFT targets currently
> claim SPC-2 compliance while they implement post SPC-2 features.
> With this patch we can correctly handle WRITE_SAME_16 issues.

OK I've just seen this as I was about to post a similar patch to get
discard going on Hyper-V. Will your patches handle Hyper-V pass through devices
that support discard? The SSD I have here reports the following in the Linux
VM:

# sg_vpd -p lbpv /dev/sdc
Logical block provisioning VPD page (SBC):
Unmap command supported (LBPU): 1
Write same (16) with unmap bit supported (LBWS): 0
Write same (10) with unmap bit supported (LBWS10): 0
Logical block provisioning read zeros (LBPRZ): 0
Anchored LBAs supported (ANC_SUP): 1
Threshold exponent: 0
Descriptor present (DP): 0
Provisioning type: 0

# sg_readcap -l /dev/sdc
Read Capacity results:
Protection: prot_en=0, p_type=0, p_i_exponent=0
Logical block provisioning: lbpme=0, lbprz=0
Last logical block address=234441647 (0xdf94baf), Number of logical blocks=234441648
Logical block length=512 bytes
Logical blocks per physical block exponent=0
Lowest aligned logical block address=0
Hence:
Device size: 120034123776 bytes, 114473.5 MiB, 120.03 GB

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


\
 
 \ /
  Last update: 2014-07-23 12:41    [W:0.338 / U:0.432 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site