Re: Cross-device and cross-driver HMM support

2024-04-09 Thread Thomas Hellström
Hi, On Wed, 2024-04-03 at 12:09 -0300, Jason Gunthorpe wrote: > On Wed, Apr 03, 2024 at 04:06:11PM +0200, Christian König wrote: > > [UGH html emails, try to avoid those they don't get archived!] > > >    The problem with that isn't the software but the hardware. > >    At least on the AMD GPUs

Re: Cross-device and cross-driver HMM support

2024-04-03 Thread Jason Gunthorpe
On Wed, Apr 03, 2024 at 04:06:11PM +0200, Christian König wrote: [UGH html emails, try to avoid those they don't get archived!] >The problem with that isn't the software but the hardware. >At least on the AMD GPUs and Intels Xe accelerators we have seen so far >page faults are not

Re: Cross-device and cross-driver HMM support

2024-04-03 Thread Christian König
Am 03.04.24 um 14:57 schrieb Jason Gunthorpe: On Wed, Apr 03, 2024 at 11:16:36AM +0200, Christian König wrote: Am 03.04.24 um 00:57 schrieb Dave Airlie: On Wed, 27 Mar 2024 at 19:52, Thomas Hellström wrote: Hi! With our SVM mirror work we'll soon start looking at HMM cross-device support.

Re: Cross-device and cross-driver HMM support

2024-04-03 Thread Jason Gunthorpe
On Wed, Apr 03, 2024 at 11:16:36AM +0200, Christian König wrote: > Am 03.04.24 um 00:57 schrieb Dave Airlie: > > On Wed, 27 Mar 2024 at 19:52, Thomas Hellström > > wrote: > > > Hi! > > > > > > With our SVM mirror work we'll soon start looking at HMM cross-device > > > support. The identified

Re: Cross-device and cross-driver HMM support

2024-04-03 Thread Christian König
Am 03.04.24 um 00:57 schrieb Dave Airlie: On Wed, 27 Mar 2024 at 19:52, Thomas Hellström wrote: Hi! With our SVM mirror work we'll soon start looking at HMM cross-device support. The identified needs are 1) Instead of migrating foreign device memory to system when the current device is

Re: Cross-device and cross-driver HMM support

2024-04-02 Thread Dave Airlie
On Wed, 27 Mar 2024 at 19:52, Thomas Hellström wrote: > > Hi! > > With our SVM mirror work we'll soon start looking at HMM cross-device > support. The identified needs are > > 1) Instead of migrating foreign device memory to system when the > current device is faulting, leave it in place... > 1a)

Cross-device and cross-driver HMM support

2024-03-27 Thread Thomas Hellström
Hi! With our SVM mirror work we'll soon start looking at HMM cross-device support. The identified needs are 1) Instead of migrating foreign device memory to system when the current device is faulting, leave it in place... 1a) for access using internal interconnect, 1b) for access using PCIE p2p