# Re: \[PATCH\] swiotlb: set IO TLB segment size via cmdline

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-09-14 15:30:55 
- List: linux-mips
- Page: https://ratatoskr.run/linux-mips/2021/09/1508132
- Thread: https://ratatoskr.run/xen-devel/2021/09/1508104/t.md

```text
On Tue, Sep 14, 2021 at 05:29:07PM +0200, Jan Beulich wrote:
> I'm not convinced the swiotlb use describe there falls under "intended
> use" - mapping a 1280x720 framebuffer in a single chunk? (As an aside,
> the bottom of this page is also confusing, as following "Then we can
> confirm the modified swiotlb size in the boot log:" there is a log
> fragment showing the same original size of 64Mb.

It doesn't.  We also do not add hacks to the kernel for whacky out
of tree modules.
```