Re: [PATCH v6 08/12] fork: Clear PASID for new mm

2021-03-02 Thread Jean-Philippe Brucker
On Mon, Mar 01, 2021 at 03:00:11PM -0800, Jacob Pan wrote: > > functionality is not a problem without this patch on x86. But I think > I feel the reason that x86 doesn't care is that mm->pasid is not used > unless bind_mm is called. I think vt-d also maintains the global_svm_list, that tells wheth

Re: [PATCH v6 08/12] fork: Clear PASID for new mm

2021-03-01 Thread Jacob Pan
Hi Fenghua, On Thu, 25 Feb 2021 22:17:11 +, Fenghua Yu wrote: > Hi, Jean, > > On Wed, Feb 24, 2021 at 11:19:27AM +0100, Jean-Philippe Brucker wrote: > > Hi Fenghua, > > > > [Trimmed the Cc list] > > > > On Mon, Jul 13, 2020 at 04:48:03PM -0700, Fenghua Yu wrote: > > > When a new mm is c

Re: [PATCH v6 08/12] fork: Clear PASID for new mm

2021-02-25 Thread Fenghua Yu
Hi, Jean, On Wed, Feb 24, 2021 at 11:19:27AM +0100, Jean-Philippe Brucker wrote: > Hi Fenghua, > > [Trimmed the Cc list] > > On Mon, Jul 13, 2020 at 04:48:03PM -0700, Fenghua Yu wrote: > > When a new mm is created, its PASID should be cleared, i.e. the PASID is > > initialized to its init state

Re: [PATCH v6 08/12] fork: Clear PASID for new mm

2021-02-24 Thread Jean-Philippe Brucker
Hi Fenghua, [Trimmed the Cc list] On Mon, Jul 13, 2020 at 04:48:03PM -0700, Fenghua Yu wrote: > When a new mm is created, its PASID should be cleared, i.e. the PASID is > initialized to its init state 0 on both ARM and X86. I just noticed this patch was dropped in v7, and am wondering whether we

[PATCH v6 08/12] fork: Clear PASID for new mm

2020-07-13 Thread Fenghua Yu
When a new mm is created, its PASID should be cleared, i.e. the PASID is initialized to its init state 0 on both ARM and X86. Signed-off-by: Fenghua Yu Reviewed-by: Tony Luck --- v2: - Add this patch to initialize PASID value for a new mm. include/linux/mm_types.h | 2 ++ kernel/fork.c