[Mesa-dev] [PATCH] anv: change BLOCK_POOL_MEMFD_SIZE to exactly 2GB

[Jason Ekstrand]

On Thu, Mar 9, 2017 at 8:37 AM, Eero Tamminen <eero.t.tamminen at intel.com>
wrote:

> HI,
>
> On 09.03.2017 13:28, Tapani Pälli wrote:
> ...
>
>> We had some discussion today with Eero and came to conclusion that maybe
>> that 2GB is actually too big for 32bit system anyway and should consider
>> to have even smaller block pool size in this case? Or should I just send
>> a patch that adds '- 1' to ftruncate call? Opinions?
>>
>
> Vulkan driver taking 2GB out of application address space, doesn't leave
> that much for rest of the memory mappings, if the application itself would
> want to mmap() some large data files.
>

That's not really what's going on.  We ftruncate the file to 2GB to make
sure it's "big enough" but we only mmap a very small portion of it.
Dropping the size to 1GB should be just fine.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20170309/c0b827a9/attachment.html>