linux-kernel - Re: [PATCH] SCSI driver for VMware's virtual HBA.

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Date:	Tue, 01 Sep 2009 09:47:29 -0700
From:	Alok Kataria <akataria@...are.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	Matthew Wilcox <matthew@....cx>,
	Alok Kataria <alokkataria1@...il.com>,
	James Bottomley <James.Bottomley@...e.de>,
	Robert Love <robert.w.love@...el.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Mike Christie <michaelc@...wisc.edu>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitry Torokhov <dtor@...are.com>,
	Rolf Eike Beer <eike-kernel@...tec.de>,
	Maxime Austruy <maustruy@...are.com>,
	Bhavesh Davda <bhavesh@...are.com>
Subject: Re: [PATCH] SCSI driver for VMware's virtual HBA.


On Tue, 2009-09-01 at 09:20 -0700, Boaz Harrosh wrote:
> On 09/01/2009 07:13 PM, Matthew Wilcox wrote:
> > 
> > Umm, we do share code between SCSI drivers.  We have the ULDs (sg, sd,
> > sr, etc), we have the midlayer, and we have the transport classes (spi,
> > iscsi, fc, etc).
> > 
> 
> This makes a tons of sense. a scsi_transport_paravirt can have lots of common
> nubs. I bet administrators would love such common management facility.

I don't see how it will help a user. VMware exports a PCI device, and
this device will be available only when running under a VMware
hypervisor. If a particular device is available the OS will use the
corresponding driver.
Please note these drivers will be used by the guest operating system,
which is running virtualized. 
I don't get what kind of control the administrator has on this ? can you
please elaborate. 

Alok
> 
> Boaz

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