On 2018/12/31 上午2:30, Michael S. Tsirkin wrote:
On Thu, Dec 27, 2018 at 05:39:21PM +0800, Jason Wang wrote:
On 2018/12/26 下午11:02, Michael S. Tsirkin wrote:
On Wed, Dec 26, 2018 at 11:57:32AM +0800, Jason Wang wrote:
On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
On Tue, Dec 25, 2018 at
On Thu, Dec 27, 2018 at 05:39:21PM +0800, Jason Wang wrote:
>
> On 2018/12/26 下午11:02, Michael S. Tsirkin wrote:
> > On Wed, Dec 26, 2018 at 11:57:32AM +0800, Jason Wang wrote:
> > > On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
> > > > On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang
On 2018/12/26 下午11:02, Michael S. Tsirkin wrote:
On Wed, Dec 26, 2018 at 11:57:32AM +0800, Jason Wang wrote:
On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang wrote:
On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
On Mon, Dec 24, 2018 at
On Wed, Dec 26, 2018 at 11:57:32AM +0800, Jason Wang wrote:
>
> On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
> > On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang wrote:
> > > On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
> > > > On Mon, Dec 24, 2018 at 03:53:16PM +0800, Jason Wang wrote:
On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang wrote:
On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
On Mon, Dec 24, 2018 at 03:53:16PM +0800, Jason Wang wrote:
On 2018/12/14 下午8:36, Michael S. Tsirkin wrote:
On Fri, Dec 14, 2018 at
On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang wrote:
>
> On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
> > On Mon, Dec 24, 2018 at 03:53:16PM +0800, Jason Wang wrote:
> > > On 2018/12/14 下午8:36, Michael S. Tsirkin wrote:
> > > > On Fri, Dec 14, 2018 at 11:57:35AM +0800, Jason Wang wrote:
On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
On Mon, Dec 24, 2018 at 03:53:16PM +0800, Jason Wang wrote:
On 2018/12/14 下午8:36, Michael S. Tsirkin wrote:
On Fri, Dec 14, 2018 at 11:57:35AM +0800, Jason Wang wrote:
On 2018/12/13 下午11:44, Michael S. Tsirkin wrote:
On Thu, Dec 13, 2018 at
On Mon, Dec 24, 2018 at 03:53:16PM +0800, Jason Wang wrote:
>
> On 2018/12/14 下午8:36, Michael S. Tsirkin wrote:
> > On Fri, Dec 14, 2018 at 11:57:35AM +0800, Jason Wang wrote:
> > > On 2018/12/13 下午11:44, Michael S. Tsirkin wrote:
> > > > On Thu, Dec 13, 2018 at 06:10:22PM +0800, Jason Wang
On 2018/12/14 下午8:36, Michael S. Tsirkin wrote:
On Fri, Dec 14, 2018 at 11:57:35AM +0800, Jason Wang wrote:
On 2018/12/13 下午11:44, Michael S. Tsirkin wrote:
On Thu, Dec 13, 2018 at 06:10:22PM +0800, Jason Wang wrote:
It was noticed that the copy_user() friends that was used to access
From: Jason Wang
Date: Fri, 14 Dec 2018 11:57:35 +0800
> This is the price of all GUP users not only vhost itself. What's more
> important, the goal is not to be left too much behind for other
> backends like DPDK or AF_XDP (all of which are using GUP).
+1
Hi Jason,
I love your patch! Yet something to improve:
[auto build test ERROR on net-next/master]
url:
https://github.com/0day-ci/linux/commits/Jason-Wang/vhost-accelerate-metadata-access-through-vmap/20181214-200417
config: mips-malta_kvm_defconfig (attached as .config)
compiler:
On Fri, Dec 14, 2018 at 11:57:35AM +0800, Jason Wang wrote:
>
> On 2018/12/13 下午11:44, Michael S. Tsirkin wrote:
> > On Thu, Dec 13, 2018 at 06:10:22PM +0800, Jason Wang wrote:
> > > It was noticed that the copy_user() friends that was used to access
> > > virtqueue metdata tends to be very
On 2018/12/13 下午11:44, Michael S. Tsirkin wrote:
On Thu, Dec 13, 2018 at 06:10:22PM +0800, Jason Wang wrote:
It was noticed that the copy_user() friends that was used to access
virtqueue metdata tends to be very expensive for dataplane
implementation like vhost since it involves lots of
On Thu, Dec 13, 2018 at 04:18:40PM -0500, Konrad Rzeszutek Wilk wrote:
> .giant snip..
> > > + npinned = get_user_pages_fast(uaddr, npages, write, pages);
> > > + if (npinned != npages)
> > > + goto err;
> > > +
> >
> > As I said I have doubts about the whole approach, but this
> >
.giant snip..
> > + npinned = get_user_pages_fast(uaddr, npages, write, pages);
> > + if (npinned != npages)
> > + goto err;
> > +
>
> As I said I have doubts about the whole approach, but this
> implementation in particular isn't a good idea
> as it keeps the page around forever.
>
On Thu, Dec 13, 2018 at 06:10:22PM +0800, Jason Wang wrote:
> It was noticed that the copy_user() friends that was used to access
> virtqueue metdata tends to be very expensive for dataplane
> implementation like vhost since it involves lots of software check,
> speculation barrier, hardware
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