;
> iommu@lists.linux-foundation.org; linux...@kvack.org; Zhangfei Gao
> ; Liguozhu (Kenneth) ;
> linux-accelerat...@lists.ozlabs.org
> Subject: RE: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> > From: Jason Gunthorpe
> > Sent: Tuesday, February 2, 2021 7:44 AM
> &
> From: Jason Gunthorpe
> Sent: Tuesday, February 2, 2021 7:44 AM
>
> On Fri, Jan 29, 2021 at 10:09:03AM +, Tian, Kevin wrote:
> > > SVA is not doom to work with IO page fault only. If we have SVA+pin,
> > > we would get both sharing address and stable I/O latency.
> >
> > Isn't it like a
sts.linux-foundation.org; linux...@kvack.org; Zhangfei Gao
> ; Liguozhu (Kenneth) ;
> linux-accelerat...@lists.ozlabs.org
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Fri, Jan 29, 2021 at 10:09:03AM +, Tian, Kevin wrote:
> > > SVA is not doom to
On Fri, Jan 29, 2021 at 10:09:03AM +, Tian, Kevin wrote:
> > SVA is not doom to work with IO page fault only. If we have SVA+pin,
> > we would get both sharing address and stable I/O latency.
>
> Isn't it like a traditional MAP_DMA API (imply pinning) plus specifying
> cpu_va of the memory
l.org; iommu@lists.linux-foundation.org;
> linux...@kvack.org; Zhangfei Gao ; Liguozhu
> (Kenneth) ; linux-accelerat...@lists.ozlabs.org
> Subject: RE: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> > From: Song Bao Hua (Barry Song)
> > Sent: Tuesday, January 26, 2021 9:27 AM
hou (B) ; Greg Kroah-Hartman
> > ; Arnd Bergmann ;
> Zhangfei Gao
> > ; linux-accelerat...@lists.ozlabs.org;
> > linux-ker...@vger.kernel.org; iommu@lists.linux-foundation.org;
> > linux...@kvack.org; Liguozhu (Kenneth) ;
> chensihang
> > (A)
> > Subject: Re: [RFC
labs.org;
> linux-ker...@vger.kernel.org; iommu@lists.linux-foundation.org;
> linux...@kvack.org; Liguozhu (Kenneth) ; chensihang
> (A)
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Tue, Jan 26, 2021 at 01:26:45AM +, Song Bao Hua (Barry Song) wrote:
> > > On
On Tue, Jan 26, 2021 at 01:26:45AM +, Song Bao Hua (Barry Song) wrote:
> > On Mon, Jan 25, 2021 at 11:35:22PM +, Song Bao Hua (Barry Song) wrote:
> >
> > > > On Mon, Jan 25, 2021 at 10:21:14PM +, Song Bao Hua (Barry Song)
> > > > wrote:
> > > > > mlock, while certainly be able to
On 2021/1/25 23:47, Jason Gunthorpe wrote:
> On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
>
>> +static int uacce_pin_page(struct uacce_pin_container *priv,
>> + struct uacce_pin_address *addr)
>> +{
>> +unsigned int flags = FOLL_FORCE | FOLL_WRITE;
>> +
x-ker...@vger.kernel.org; iommu@lists.linux-foundation.org;
> linux...@kvack.org; Liguozhu (Kenneth) ; chensihang
> (A)
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Mon, Jan 25, 2021 at 11:35:22PM +, Song Bao Hua (Barry Song) wrote:
>
> > >
On Mon, Jan 25, 2021 at 11:35:22PM +, Song Bao Hua (Barry Song) wrote:
> > On Mon, Jan 25, 2021 at 10:21:14PM +, Song Bao Hua (Barry Song) wrote:
> > > mlock, while certainly be able to prevent swapping out, it won't
> > > be able to stop page moving due to:
> > > * memory compaction in
On Mon, Jan 25, 2021 at 10:21:14PM +, Song Bao Hua (Barry Song) wrote:
> mlock, while certainly be able to prevent swapping out, it won't
> be able to stop page moving due to:
> * memory compaction in alloc_pages()
> * making huge pages
> * numa balance
> * memory compaction in CMA
Enabling
o
> ; linux-accelerat...@lists.ozlabs.org;
> linux-ker...@vger.kernel.org; iommu@lists.linux-foundation.org;
> linux...@kvack.org; Liguozhu (Kenneth) ; chensihang
> (A)
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Mon, Jan 25, 2021 at 10:21:1
;
> iommu@lists.linux-foundation.org; linux...@kvack.org; Song Bao Hua (Barry
> Song)
> ; Liguozhu (Kenneth) ;
> chensihang (A)
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
>
> > +static
On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
> +static int uacce_pin_page(struct uacce_pin_container *priv,
> + struct uacce_pin_address *addr)
> +{
> + unsigned int flags = FOLL_FORCE | FOLL_WRITE;
> + unsigned long first, last, nr_pages;
> +
On 2021/1/25 17:28, Greg Kroah-Hartman wrote:
> On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
>> +static int uacce_pin_page(struct uacce_pin_container *priv,
>> + struct uacce_pin_address *addr)
>> +{
>> +unsigned int flags = FOLL_FORCE | FOLL_WRITE;
>> +
On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
> +static int uacce_pin_page(struct uacce_pin_container *priv,
> + struct uacce_pin_address *addr)
> +{
> + unsigned int flags = FOLL_FORCE | FOLL_WRITE;
> + unsigned long first, last, nr_pages;
> + struct
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