On Tue, Feb 04, 2020 at 04:02:38PM +, Xia, Hongyan wrote:
[...]
> > Keep in mind that accessing the union {pv, hvm} before knowing the
> > exact variant is dangerous.
> >
> > Because mapcache is initialised for PV only, so it should be freed
> > for
> > PV only. I think you need to put it to
On Tue, 2020-02-04 at 12:08 +, Wei Liu wrote:
> Thanks, I welcome effort to make Xen more scalable. :-)
>
> On Mon, Feb 03, 2020 at 06:36:53PM +, Hongyan Xia wrote:
> > Rewrite the mapcache to be purely per-vCPU instead of partly per-
> > vCPU
> > and partly per-domain.
> >
> > This
On Tue, 2020-02-04 at 14:17 +, Andrew Cooper wrote:
> On 03/02/2020 18:36, Hongyan Xia wrote:
> > Rewrite the mapcache to be purely per-vCPU instead of partly per-
> > vCPU
> > and partly per-domain.
> >
> > This patch is needed to address performance issues when we start
> > relying
> > on
On Tue, 2020-02-04 at 14:00 +, Wei Liu wrote:
> On Mon, Feb 03, 2020 at 06:36:53PM +, Hongyan Xia wrote:
> [...]
> > diff --git a/xen/arch/x86/domain_page.c
> > b/xen/arch/x86/domain_page.c
> > index dd32712d2f..52971d2ecc 100644
> > --- a/xen/arch/x86/domain_page.c
> > +++
On 03/02/2020 18:36, Hongyan Xia wrote:
> Rewrite the mapcache to be purely per-vCPU instead of partly per-vCPU
> and partly per-domain.
>
> This patch is needed to address performance issues when we start relying
> on the mapcache, e.g., when we do not have a direct map. Currently, the
>
On Mon, Feb 03, 2020 at 06:36:53PM +, Hongyan Xia wrote:
[...]
> diff --git a/xen/arch/x86/domain_page.c b/xen/arch/x86/domain_page.c
> index dd32712d2f..52971d2ecc 100644
> --- a/xen/arch/x86/domain_page.c
> +++ b/xen/arch/x86/domain_page.c
> @@ -69,12 +69,11 @@ void __init
Thanks, I welcome effort to make Xen more scalable. :-)
On Mon, Feb 03, 2020 at 06:36:53PM +, Hongyan Xia wrote:
> Rewrite the mapcache to be purely per-vCPU instead of partly per-vCPU
> and partly per-domain.
>
> This patch is needed to address performance issues when we start relying
> on
Rewrite the mapcache to be purely per-vCPU instead of partly per-vCPU
and partly per-domain.
This patch is needed to address performance issues when we start relying
on the mapcache, e.g., when we do not have a direct map. Currently, the
per-domain lock on the mapcache is a bottleneck for
