On Wed, Jul 8, 2020 at 10:20 AM Christian König
wrote:
>
> Am 08.07.20 um 11:49 schrieb Daniel Vetter:
> > On Wed, Jul 08, 2020 at 11:38:31AM +0200, Christian König wrote:
> >> Am 07.07.20 um 23:58 schrieb Xiong, Jianxin:
> -Original Message-
> From: Christian König
> Am
Am 08.07.20 um 11:49 schrieb Daniel Vetter:
On Wed, Jul 08, 2020 at 11:38:31AM +0200, Christian König wrote:
Am 07.07.20 um 23:58 schrieb Xiong, Jianxin:
-Original Message-
From: Christian König
Am 03.07.20 um 15:14 schrieb Jason Gunthorpe:
On Fri, Jul 03, 2020 at 02:52:03PM +0200,
On Wed, Jul 08, 2020 at 11:38:31AM +0200, Christian König wrote:
> Am 07.07.20 um 23:58 schrieb Xiong, Jianxin:
> > > -Original Message-
> > > From: Christian König
> > > Am 03.07.20 um 15:14 schrieb Jason Gunthorpe:
> > > > On Fri, Jul 03, 2020 at 02:52:03PM +0200, Daniel Vetter wrote:
>
Am 07.07.20 um 23:58 schrieb Xiong, Jianxin:
-Original Message-
From: Christian König
Am 03.07.20 um 15:14 schrieb Jason Gunthorpe:
On Fri, Jul 03, 2020 at 02:52:03PM +0200, Daniel Vetter wrote:
So maybe I'm just totally confused about the rdma model. I thought:
- you bind a pile of
> -Original Message-
> From: Christian König
> Am 03.07.20 um 15:14 schrieb Jason Gunthorpe:
> > On Fri, Jul 03, 2020 at 02:52:03PM +0200, Daniel Vetter wrote:
> >
> >> So maybe I'm just totally confused about the rdma model. I thought:
> >> - you bind a pile of memory for various
On Thu, Jul 02, 2020 at 08:15:40PM +0200, Daniel Vetter wrote:
> > > > 3. rdma driver worker gets busy to restart rx:
> > > > 1. lock all dma-buf that are currently in use (dma_resv_lock).
> > > > thanks to ww_mutex deadlock avoidance this is possible
> > > Why all? Why not just
On Fri, Jul 03, 2020 at 02:52:03PM +0200, Daniel Vetter wrote:
> So maybe I'm just totally confused about the rdma model. I thought:
> - you bind a pile of memory for various transactions, that might
> happen whenever. Kernel driver doesn't have much if any insight into
> when memory isn't needed
Am 03.07.20 um 15:14 schrieb Jason Gunthorpe:
On Fri, Jul 03, 2020 at 02:52:03PM +0200, Daniel Vetter wrote:
So maybe I'm just totally confused about the rdma model. I thought:
- you bind a pile of memory for various transactions, that might
happen whenever. Kernel driver doesn't have much if
On Fri, Jul 3, 2020 at 2:03 PM Jason Gunthorpe wrote:
>
> On Thu, Jul 02, 2020 at 08:15:40PM +0200, Daniel Vetter wrote:
> > > > > 3. rdma driver worker gets busy to restart rx:
> > > > > 1. lock all dma-buf that are currently in use (dma_resv_lock).
> > > > > thanks to ww_mutex
Daniel ; Christian
> > Koenig ; dri-
> > de...@lists.freedesktop.org
> > Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
> >
> > > >
> > > > On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
> > > > > > > Hete
On Thu, Jul 02, 2020 at 03:10:00PM +0200, Daniel Vetter wrote:
> On Wed, Jul 01, 2020 at 02:15:24PM -0300, Jason Gunthorpe wrote:
> > On Wed, Jul 01, 2020 at 05:42:21PM +0200, Daniel Vetter wrote:
> > > > >> All you need is the ability to stop wait for ongoing accesses to end
> > > > >> and
> > >
On Thu, Jul 02, 2020 at 04:50:32PM +0200, Christian König wrote:
> Am 02.07.20 um 15:29 schrieb Jason Gunthorpe:
> > On Thu, Jul 02, 2020 at 03:10:00PM +0200, Daniel Vetter wrote:
> > > On Wed, Jul 01, 2020 at 02:15:24PM -0300, Jason Gunthorpe wrote:
> > > > On Wed, Jul 01, 2020 at 05:42:21PM
Am 02.07.20 um 15:29 schrieb Jason Gunthorpe:
On Thu, Jul 02, 2020 at 03:10:00PM +0200, Daniel Vetter wrote:
On Wed, Jul 01, 2020 at 02:15:24PM -0300, Jason Gunthorpe wrote:
On Wed, Jul 01, 2020 at 05:42:21PM +0200, Daniel Vetter wrote:
All you need is the ability to stop wait for ongoing
On Wed, Jul 01, 2020 at 02:15:24PM -0300, Jason Gunthorpe wrote:
> On Wed, Jul 01, 2020 at 05:42:21PM +0200, Daniel Vetter wrote:
> > > >> All you need is the ability to stop wait for ongoing accesses to end
> > > >> and
> > > >> make sure that new ones grab a new mapping.
> > > > Swap and flush
ug Ledford ; Sumit
> > > Semwal ; Leon Romanovsky
> > > ; Vetter, Daniel ; Christian
> > > Koenig
> > > Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
> > >
> > > On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
On Wed, Jul 01, 2020 at 05:42:21PM +0200, Daniel Vetter wrote:
> > >> All you need is the ability to stop wait for ongoing accesses to end and
> > >> make sure that new ones grab a new mapping.
> > > Swap and flush isn't a general HW ability either..
> > >
> > > I'm unclear how this could be
;>>> Sent: Tuesday, June 30, 2020 10:35 AM
> >>>> To: Xiong, Jianxin
> >>>> Cc: linux-r...@vger.kernel.org; Doug Ledford ;
> >>>> Sumit Semwal ; Leon Romanovsky
> >>>> ; Vetter, Daniel ; Christian
> >>>> Koenig
Semwal
; Leon Romanovsky
; Vetter, Daniel ; Christian Koenig
Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
Heterogeneous Memory Management (HMM) utilizes
mmu_interval_notifier and ZONE_DEVICE to support shared virtual
Leon Romanovsky
> > > > ; Vetter, Daniel ; Christian
> > > > Koenig
> > > > Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
> > > >
> > > > On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
> > > > >
> > > Sent: Tuesday, June 30, 2020 10:35 AM
> > > To: Xiong, Jianxin
> > > Cc: linux-r...@vger.kernel.org; Doug Ledford ; Sumit
> > > Semwal ; Leon Romanovsky
> > > ; Vetter, Daniel ; Christian
> > > Koenig
> > > Subject: Re: [RFC PAT
0/3] RDMA: add dma-buf support
On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
Heterogeneous Memory Management (HMM) utilizes
mmu_interval_notifier and ZONE_DEVICE to support shared virtual
address space and page migration between system memory and device
memory. HMM doesn't
tter, Daniel ; Christian
> > Koenig
> > Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
> >
> > On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
> > > > > Heterogeneous Memory Management (HMM) utilizes
> > > > > mmu_interval_not
top.org
> Subject: Re: [RFC PATCH v2 0/3] RDMA: add dma-buf support
>
> > >
> > > On Tue, Jun 30, 2020 at 05:21:33PM +, Xiong, Jianxin wrote:
> > > > > > Heterogeneous Memory Management (HMM) utilizes
> > > > > > mmu_interval_notifier
Added to cc-list:
Christian Koenig
dri-devel@lists.freedesktop.org
> -Original Message-
> From: Xiong, Jianxin
> Sent: Monday, June 29, 2020 10:32 AM
> To: linux-r...@vger.kernel.org
> Cc: Xiong, Jianxin ; Doug Ledford
> ; Jason Gunthorpe ; Sumit Semwal
> ; Leon Romanovsky ; Vetter,
> -Original Message-
> From: Jason Gunthorpe
> Sent: Tuesday, June 30, 2020 10:35 AM
> To: Xiong, Jianxin
> Cc: linux-r...@vger.kernel.org; Doug Ledford ; Sumit
> Semwal ; Leon Romanovsky
> ; Vetter, Daniel ; Christian Koenig
>
> Subject: Re: [RFC PATC
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