Hi Stefano, > Also, Option 1 listed in the webpage seems to be a lot better. Any > reason you can't do that? Because that option both solves the problem > and increases performance. Yes, Option 1 is probably more efficient. But I use another platform under Xen without DMA adjustment functionality. I pinned this webpage only for example to describe the similar problem I had. Cheers, Roman ср, 15 сент. 2021 г. в 04:51, Stefano Stabellini <sstabellini@xxxxxxxxxx>: > > On Tue, 14 Sep 2021, Christoph Hellwig wrote: > > 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. > > Also, Option 1 listed in the webpage seems to be a lot better. Any > reason you can't do that? Because that option both solves the problem > and increases performance. -- Best Regards, Roman.
