On 09/11/2018 14:24:40+0100, Christoph Hellwig wrote: > On Fri, Nov 09, 2018 at 02:10:14PM +0100, Alexandre Belloni wrote: > > Hello, > > > > I'm working on a (not yet upstreamed) dmaengine driver. While rebasing > > from v4.19 to v4.20-rc1, I saw that it is not working properly anymore > > because dma_pool is allocating descriptors in kseg0 which is cached > > while in v4.19, it was allocating them in kseg1. > > > > Am I missing something to explicitely state that the cache is not dma > > coherent? How could I track this behaviour change? > > You probably want this commit: > > https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?h=mips-fixes&id=d01501f85249848a2497968d46dd46d5c6fe32e6 Yep, this helped, thanks a lot! -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
