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From: Chris Wright <chrisw@sous-sol.org>
To: Alok Kataria <akataria@vmware.com>
Cc: Chris Wright <chrisw@sous-sol.org>,
	James Bottomley <James.Bottomley@suse.de>,
	Randy Dunlap <randy.dunlap@oracle.com>,
	Mike Christie <michaelc@cs.wisc.edu>,
	Bart Van Assche <bvanassche@acm.org>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	Matthew Wilcox <matthew@wil.cx>,
	"pv-drivers@vmware.com" <pv-drivers@vmware.com>,
	Roland Dreier <rdreier@cisco.com>,
	LKML <linux-kernel@vger.kernel.org>,
	"Chetan.Loke@Emulex.Com" <Chetan.Loke@Emulex.Com>,
	Brian King <brking@linux.vnet.ibm.com>,
	Rolf Eike Beer <eike-kernel@sf-tec.de>,
	Robert Love <robert.w.love@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Daniel Walker <dwalker@fifo99.com>, Greg KH <gregkh@suse.de>,
	"virtualization@lists.linux-foundataion.org"
	<virtualization@lists.linux-foundataion.org>
Subject: Re: SCSI driver for VMware's virtual HBA - V5.
Date: Tue, 13 Oct 2009 15:00:13 -0700	[thread overview]
Message-ID: <20091013220013.GB2908@sequoia.sous-sol.org> (raw)
In-Reply-To: <1255469294.12792.93.camel@ank32.eng.vmware.com>

* Alok Kataria (akataria@vmware.com) wrote:
> On Mon, 2009-10-12 at 22:37 -0700, Chris Wright wrote:
> > > +     pvscsi_template.can_queue =
> > > +             min(PVSCSI_MAX_NUM_PAGES_REQ_RING, pvscsi_ring_pages) *
> > > +             PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE;
> > > +     pvscsi_template.cmd_per_lun =
> > > +             min(pvscsi_template.can_queue, pvscsi_cmd_per_lun);
> > 
> > When/how are these tunables used?  Are they still useful?
> 
> cmd_per_lun, is a commandline parameter.

Actually I meant how is a user supposed to use these?  They looked to me
like tunables that were part of developing a driver that may not be
needed any longer.  What are the right values, what are the tradeoffs,
etc?  Or should they just be removed?

thanks,
-chris

  reply	other threads:[~2009-10-13 22:02 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-30 18:53 SCSI driver for VMware's virtual HBA - V5 Alok Kataria
2009-09-30 18:56 ` Alok Kataria
2009-10-02  0:47 ` Chris Wright
2009-10-02  1:43   ` James Bottomley
2009-10-02  4:37     ` Alok Kataria
2009-10-06  0:30   ` Alok Kataria
2009-10-13  5:37     ` Chris Wright
2009-10-13 21:28       ` Alok Kataria
2009-10-13 22:00         ` Chris Wright [this message]
2009-10-13 22:13           ` Alok Kataria
2009-10-13 21:51       ` SCSI driver for VMware's virtual HBA - V6 Alok Kataria
2009-10-13 21:51         ` Alok Kataria
2009-10-13 23:41         ` Chris Wright
2009-10-13 23:41           ` Chris Wright
2009-10-28 20:28           ` Alok Kataria
2009-10-13 14:35     ` SCSI driver for VMware's virtual HBA - V5 James Bottomley
2009-10-13 16:45       ` Jeremy Fitzhardinge
2009-10-13 17:18         ` Alok Kataria
2009-10-13 17:18         ` Alok Kataria
2009-10-13 16:45       ` Jeremy Fitzhardinge
2009-10-13 14:35     ` James Bottomley

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