On 3/24/21 10:04 AM, Brijesh Singh wrote:
> @@ -1377,6 +1442,22 @@ void do_user_addr_fault(struct pt_regs *regs,
> if (hw_error_code & X86_PF_INSTR)
> flags |= FAULT_FLAG_INSTRUCTION;
>
> + /*
> + * If its an RMP violation, see if we can resolve it.
> + */
> + if ((hw_error_code & X86_PF_RMP)) {
> + ret = handle_rmp_page_fault(hw_error_code, address);
> + if (ret == RMP_FAULT_PAGE_SPLIT) {
> + flags |= FAULT_FLAG_PAGE_SPLIT;
> + } else if (ret == RMP_FAULT_KILL) {
> + fault |= VM_FAULT_SIGBUS;
> + mm_fault_error(regs, hw_error_code, address, fault);
> + return;
> + } else {
> + return;
> + }
> + }
Won't khugepaged come right back around and coalesce this page again?
