From: "Derrick, Jonathan" <jonathan.derrick@intel.com>
To: "hch@infradead.org" <hch@infradead.org>
Cc: "kbusch@kernel.org" <kbusch@kernel.org>,
"lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"helgaas@kernel.org" <helgaas@kernel.org>
Subject: Re: [PATCH 0/3] PCI: vmd: Reducing tail latency by affining to the storage stack
Date: Thu, 7 Nov 2019 15:40:15 +0000 [thread overview]
Message-ID: <c0d62e0f1f8d1d6f31b2a63757aad471ced1df28.camel@intel.com> (raw)
In-Reply-To: <20191107153736.GA16006@infradead.org>
On Thu, 2019-11-07 at 07:37 -0800, hch@infradead.org wrote:
> On Thu, Nov 07, 2019 at 02:12:50PM +0000, Derrick, Jonathan wrote:
> > > How does this compare to simplify disabling VMD?
> >
> > It's a moot point since Keith pointed out a few flaws with this set,
> > however disabling VMD is not an option for users who wish to
> > passthrough VMD
>
> And why would you ever pass through vmd instead of the actual device?
> That just makes things go slower and adds zero value.
Ability to use physical Root Ports/DSPs/etc in a guest. Slower is
acceptable for many users if it fits within a performance window
next prev parent reply other threads:[~2019-11-07 15:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 11:40 [PATCH 0/3] PCI: vmd: Reducing tail latency by affining to the storage stack Jon Derrick
2019-11-06 11:40 ` [PATCH 1/3] PCI: vmd: Reduce VMD vectors using NVMe calculation Jon Derrick
2019-11-06 18:02 ` Keith Busch
2019-11-06 19:51 ` Derrick, Jonathan
2019-11-06 11:40 ` [PATCH 2/3] PCI: vmd: Align IRQ lists with child device vectors Jon Derrick
2019-11-06 18:06 ` Keith Busch
2019-11-06 20:14 ` Derrick, Jonathan
2019-11-06 11:40 ` [PATCH 3/3] PCI: vmd: Use managed irq affinities Jon Derrick
2019-11-06 18:10 ` Keith Busch
2019-11-06 20:14 ` Derrick, Jonathan
2019-11-06 20:27 ` Keith Busch
2019-11-06 20:33 ` Derrick, Jonathan
2019-11-18 10:49 ` Lorenzo Pieralisi
2019-11-18 16:43 ` Derrick, Jonathan
2019-11-07 9:39 ` [PATCH 0/3] PCI: vmd: Reducing tail latency by affining to the storage stack Christoph Hellwig
2019-11-07 14:12 ` Derrick, Jonathan
2019-11-07 15:37 ` hch
2019-11-07 15:40 ` Derrick, Jonathan [this message]
2019-11-07 15:42 ` hch
2019-11-07 15:47 ` Derrick, Jonathan
2019-11-11 17:03 ` hch
2022-12-23 2:33 ` Kai-Heng Feng
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