> On 19 Mar 2022, at 21:11, Christian Lamparter <chunkeey@xxxxxxxxx> wrote: > > Samsung' 840 EVO with the latest firmware (EXT0DB6Q) locks up with > the a message: "READ LOG DMA EXT failed, trying PIO" during boot. I don't see any info on which kernel this happened with anywhere. Because there was a bug that tried to use READ LOG DMA EXT even though DMA was not enabled. That was fixed by a patch from me for 5.16 (and backports). The behaviour you describe matches the possible symptoms of that bug. So it would be good to know we're not blaming the drive for an already fixed bug in the kernel... (I am still seeing some issues that READ LOG EXT - the non-DMA version - times out with interrupt lost for some device/controller combinations, but at least that "only" adds an extra 15 seconds to the boot. It's still a bit silly because in combination with e.g. IDE controllers READ LOG provides absolutely no useful functionality as far as I can tell). Best regards, Reimar
