On 20/02/2019 09:01, Jan Beulich wrote: > But isn't it a valid question whether keeping interrupt remapping > enabled is helpful or potentially making things worse? The > description of the patch discusses the DMA translation aspects > only. Unless the crash kernel would always operate in polling > mode only, it needs to have interrupts routed to the right > handler(s). Whether that's guaranteed with remapping left > enabled is not something that goes without saying, imo. >
IR copy logic works as follows - IRT is copied as is and still in functioning state while remapable interrupts might be in-flight. New IRT entries are allocated in addition to existing ones which makes the transition transparent for a device. I'll mention this aspect in the commit message since it doesn't seem obvious - you're right. Igor _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
