[Mesa-dev] [PATCH 0/9] anv: softpin

[Jason Ekstrand]

On Thu, May 3, 2018 at 11:24 PM, Chris Wilson <chris at chris-wilson.co.uk>
wrote:

> Quoting Scott D Phillips (2018-05-02 17:01:00)
> > This series teaches anv how to pick its own virtual graphics addresses
> > instead of using the relocation facility provided by the kernel.
> >
> > Jason Ekstrand (1):
> >   util: Add a virtual memory allocator
> >
> > Scott D Phillips (8):
> >   util/set: add a set_clear function
> >   anv: remove unused field anv_queue::pool
> >   anv: move canonical_address calculation into a separate function
> >   anv: Add vma_heap allocators in anv_device
> >   anv: soft pin state pools
> >   anv: use a separate pool for binding tables when soft pinning
> >   anv: elide relocations to pinned target bos
> >   anv: soft pin the remaining bos
>
> Something that I see missing from the allocator is consideration of
> hugepage alignment requirements, 64k pages need 2MiB alignment, 1GiB
> need 1GiB alignment.
>

The allocator takes an alignment parameter and is perfectly capable of
whatever alignment you want.  We're not using huge pages directly so I'm a
bit confused by what you're saying.  Isn't this the kernel's problem?  Or
are we somehow going to get better performance if we align things higher?
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