On Thu, Jan 09, 2020 at 05:46:13PM +0100, Maxime Villard wrote: > This FPU issue should be fixed in the latest nvmm_x86_vmx.c, we still have > STTS/CLTS (not needed but for debugging) as part of context switches, and > when overhauling the FPU code I overlooked that VMX needs special CR0_TS > care that SVM doesn't need. > > Note that dropping STTS/CLTS would probably increase cswitch performance, > because updating cr0 is costly. > > Having said that, I am still hitting a KASSERT related to pmap: > > kernel diagnostic assertion "ptp->wire_count == 1" failed file > ".../x86/x86/pmap.c", line 1969 > pmap_freepages > pmap_ept_free_ptp > pmap_ept_remove > pmap_remove > uvm_unmap_remove > uvmspace_free > nvmm_ioctl > sys_ioctl
Taking a look. I think it's probably related to the changes I made to further defer freeing PTPs (ugly but necessary for yamt-pagecache). I think I see a more elegant way to handle that. Andrew
