lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sat, 26 Jul 2014 13:44:08 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	Sitsofe Wheeler <sitsofe@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"ohering@...e.com" <ohering@...e.com>,
	"apw@...onical.com" <apw@...onical.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"jbottomley@...allels.com" <jbottomley@...allels.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH v2 3/3] [SCSI] Make LBP quirk skip lbpme checks tests



> -----Original Message-----
> From: Martin K. Petersen [mailto:martin.petersen@...cle.com]
> Sent: Friday, July 25, 2014 9:57 AM
> To: KY Srinivasan
> Cc: Martin K. Petersen; Sitsofe Wheeler; Christoph Hellwig;
> 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 v2 3/3] [SCSI] Make LBP quirk skip lbpme checks tests
> 
> >>>>> "KY" == KY Srinivasan <kys@...rosoft.com> writes:
> 
> KY> For the pass through case, the host validates the request and passes
> KY> the request to the device.  However, not all scsi commands are
> KY> passed through even though the device it is being passed through may
> KY> support the command. WRITE_SAME is one such command.
> Consequently,
> KY> in the EVPD page, we will set state indicating that WRITE_SAME is
> KY> not supported (even if the device supports it).
> 
> The LBP VPD page flags UNMAP as being supported. Do you actually support
> UNMAP to DSM TRIM SCSI-ATA translation?

Martin,

I have been told by the Windows folks that this is done. I am trying to get
additional details.

K. Y
> 
> One challenge in that department is that a single UNMAP command may turn
> into many, many, many DSM TRIM commands on the underlying SATA
> device.
> That's why we went with WRITE SAME for the internal Linux SATL, capping
> the maximum number of blocks to what we can fit in a single DSM TRIM
> command.
> 
> --
> Martin K. Petersen	Oracle Linux Engineering
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists