All of lore.kernel.org
 help / color / mirror / Atom feed
From: "hch@infradead.org" <hch@infradead.org>
To: "Derrick, Jonathan" <jonathan.derrick@intel.com>
Cc: "hch@infradead.org" <hch@infradead.org>,
	"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: Mon, 11 Nov 2019 09:03:40 -0800	[thread overview]
Message-ID: <20191111170340.GA26474@infradead.org> (raw)
In-Reply-To: <784d25a41399472e80a0b384f88eccab29b01cc1.camel@intel.com>

On Thu, Nov 07, 2019 at 03:47:09PM +0000, Derrick, Jonathan wrote:
> A cloud service provider might have several VMs on a single system and
> wish to provide surprise hotplug functionality within the guests so
> that they don't need to bring the whole server down or migrate VMs in
> order to swap disks.

And how does the vmd mechanism help with that?  Maybe qemu is missing
a memremap to not access the remove device right now, but adding that
is way simpler than having to deal with a device that makes everyones
life complicated.


  reply	other threads:[~2019-11-11 17:03 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
2019-11-07 15:42         ` hch
2019-11-07 15:47           ` Derrick, Jonathan
2019-11-11 17:03             ` hch [this message]
2022-12-23  2:33 ` Kai-Heng Feng

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191111170340.GA26474@infradead.org \
    --to=hch@infradead.org \
    --cc=helgaas@kernel.org \
    --cc=jonathan.derrick@intel.com \
    --cc=kbusch@kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.