On Fri, Jun 20, 2014 at 01:43:50PM +0200, Joerg Roedel wrote:
> Change_pte is also called when the underlying page of an address
> changes in the kernel which would matter for DMA. But that can only
> happen in KSM and uprobes code which is probably not of interest for the
> i915 driver.
>
> The o
On Thu, Jun 19, 2014 at 05:02:57PM +0100, Chris Wilson wrote:
> Maybe it should hook the invalidate_page notifier. I picked
> invalidate_range() as it seemed to be called first and seemed to cover
> all operations that affected an mm's addr range. The invalidate_page
> seemed to be only called dur
Hey Chris,
recently I had a look at i915_gem_userptr.c in order to extend the
mmu_notifier call-backs implemented there. My goal is to implement the
change_pte call-back where it is necessary to get rid of it being
wrapped mn_invalidate_range_start/end() calls (for the reason see
commit 6bdb913f).
On Thu, Jun 19, 2014 at 05:36:55PM +0200, Joerg Roedel wrote:
> Hey Chris,
>
> recently I had a look at i915_gem_userptr.c in order to extend the
> mmu_notifier call-backs implemented there. My goal is to implement the
> change_pte call-back where it is necessary to get rid of it being
> wrapped m
