Hi Juergen, On 08/01/2020 15:20, Sergey Dyasli wrote: > It is incorrect to call pmd_populate_kernel() multiple times for the > same page table. Xen notices it during kasan_populate_early_shadow(): > > (XEN) mm.c:3222:d155v0 mfn 3704b already pinned > > This happens for kasan_early_shadow_pte when USE_SPLIT_PTE_PTLOCKS is > enabled. Fix this by introducing set_pmd_early_shadow() which calls > pmd_populate_kernel() only once and uses set_pmd() afterwards. > > Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx> Looks like the plan to use set_pmd() directly has failed: it's an arch-specific function and can't be used in arch-independent code (as kbuild test robot has proven). Do you see any way out of this other than disabling SPLIT_PTE_PTLOCKS for PV KASAN? -- Thanks, Sergey
