From: Maxim Levitsky <mlevitsk@redhat.com>
To: Christoph Hellwig <hch@lst.de>, Max Gurtovoy <maxg@mellanox.com>
Cc: Fam Zheng <fam@euphon.net>,
kvm@vger.kernel.org, Wolfram Sang <wsa@the-dreams.de>,
linux-nvme@lists.infradead.org,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Keith Busch <keith.busch@intel.com>,
Kirti Wankhede <kwankhede@nvidia.com>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
"Paul E . McKenney" <paulmck@linux.ibm.com>,
Sagi Grimberg <sagi@grimberg.me>,
Christoph Hellwig <hch@infradead.org>,
Liang Cunming <cunming.liang@intel.com>,
Jens Axboe <axboe@fb.com>,
Alex Williamson <alex.williamson@redhat.com>,
John Ferlan <jferlan@redhat.com>,
Liu Changpeng <changpeng.liu@intel.com>,
Jens Axboe <axboe@kernel.dk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Amnon Ilan <ailan@redhat.com>,
"David S . Miller" <davem@davemloft.net>
Subject: Re: [PATCH v2 06/10] nvme/core: add mdev interfaces
Date: Mon, 06 May 2019 11:34:26 +0300 [thread overview]
Message-ID: <8ed3a93804ca136690749edcb464a60d4149a4e8.camel@redhat.com> (raw)
In-Reply-To: <1cc7efd1852f298b01f09955f2c4bf3b20cead13.camel@redhat.com>
On Mon, 2019-05-06 at 11:31 +0300, Maxim Levitsky wrote:
> On Sat, 2019-05-04 at 08:49 +0200, Christoph Hellwig wrote:
> > On Fri, May 03, 2019 at 10:00:54PM +0300, Max Gurtovoy wrote:
> > > Don't see a big difference of taking NVMe queue and namespace/partition
> > > to
> > > guest OS or to P2P since IO is issued by external entity and pooled
> > > outside
> > > the pci driver.
> >
> > We are not going to the queue aside either way.. That is where the
> > last patch in this series is already working to, and which would be
> > the sensible vhost model to start with.
>
> Why are you saying that? I actualy prefer to use a sepearate queue per
> software
> nvme controller, tat because of lower overhead (about half than going through
> the block layer) and it better at QoS as the separate queue (or even few
> queues
> if needed) will give the guest a mostly guaranteed slice of the bandwidth of
> the
> device.
Sorry for typos - I need more coffee :-)
Best regards,
Maxim Levitsky
next prev parent reply other threads:[~2019-05-06 8:34 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 11:47 [PATCH v2 00/10] RFC: NVME MDEV Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 01/10] vfio/mdev: add notifier for map events Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 02/10] vfio/mdev: add .request callback Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 03/10] nvme/core: add some more values from the spec Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 04/10] nvme/core: add NVME_CTRL_SUSPENDED controller state Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 05/10] nvme/pci: use the NVME_CTRL_SUSPENDED state Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 06/10] nvme/core: add mdev interfaces Maxim Levitsky
2019-05-03 12:29 ` Christoph Hellwig
2019-05-03 19:00 ` Max Gurtovoy
2019-05-04 6:49 ` Christoph Hellwig
2019-05-06 8:31 ` Maxim Levitsky
2019-05-06 8:34 ` Maxim Levitsky [this message]
2019-05-06 12:59 ` Christoph Hellwig
2019-05-02 11:47 ` [PATCH v2 07/10] nvme/core: add nvme-mdev core driver Maxim Levitsky
2019-05-02 11:47 ` [PATCH v2 08/10] nvme/pci: implement the mdev external queue allocation interface Maxim Levitsky
2019-05-02 14:20 ` Maxim Levitsky
2019-05-02 21:12 ` Heitke, Kenneth
2019-05-02 21:20 ` Maxim Levitsky
2019-05-03 12:09 ` Keith Busch
2019-05-06 7:55 ` Maxim Levitsky
2019-05-02 11:48 ` [PATCH v2 09/10] nvme/mdev - Add inline performance measurments Maxim Levitsky
2019-05-02 11:48 ` [PATCH v2 10/10] nvme/mdev - generic block IO code Maxim Levitsky
2019-05-03 12:18 ` [PATCH v2 00/10] RFC: NVME MDEV Christoph Hellwig
2019-05-06 9:04 ` Maxim Levitsky
2019-05-06 12:57 ` Christoph Hellwig
2019-05-06 16:43 ` Keith Busch
2019-05-08 12:39 ` Paolo Bonzini
2019-05-09 9:12 ` Stefan Hajnoczi
2019-05-09 13:49 ` Keith Busch
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