---- On Tue, 10 Sep 2024 05:24:11 +0100 Christoph Hellwig wrote --- > Hi Robert, > > what platform is this on? Does it have DMA that is not cache coherent? > > I't s an AMD Zen2 based device, should be coherent. It also didn't occur on 6.1 kernel, making this fell more like a regression to me (though never discount statistics)