From: Vladislav Bolkhovitin <vst@vlnb.net>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Luben Tuikov <ltuikov@yahoo.com>, Greg KH <greg@kroah.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
tj@kernel.org,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Jens Axboe <jaxboe@fusionio.com>
Subject: Re: SCSI TMF processing; tag allocation
Date: Tue, 16 Nov 2010 23:28:53 +0300 [thread overview]
Message-ID: <4CE2E985.4050102@vlnb.net> (raw)
In-Reply-To: <20101113123750.GF18258@parisc-linux.org>
Matthew Wilcox, on 11/13/2010 03:37 PM wrote:
> SPC-4 seems to indicate (in the INQUIRY command, 6.4.2) that support
> for queueing is now non-optional, and even support for basic queueing
> has been removed, replaced only with the 'command management model'.
> I must confess to being somewhat confused by the difference between the
> 'basic queue' model and 'command management' model
The 'command management model' is what was called 'full task management
model' in SAM-3. The difference of it with 'basic task management model'
in SAM-3 is that (basically) in the latter:
- Support only for SIMPLE or ORDERED commands (not both)
- For SIMPLE commands their reorder can't be controlled
- On any error all queued commands must be aborted and this behavior
can't be controlled.
Vlad
next prev parent reply other threads:[~2010-11-16 20:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-06 6:02 SCSI TMF processing; tag allocation Luben Tuikov
2010-11-13 12:37 ` Matthew Wilcox
2010-11-15 9:28 ` Jens Axboe
2010-11-15 14:33 ` James Bottomley
2010-11-15 14:40 ` Alan Cox
2010-11-15 14:53 ` James Bottomley
2010-11-15 14:46 ` Matthew Wilcox
2010-11-15 14:52 ` James Bottomley
2010-11-16 20:28 ` Vladislav Bolkhovitin [this message]
2010-11-15 18:53 ` Douglas Gilbert
2010-11-15 19:09 ` Matthew Wilcox
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