Okay, I need to classify this bug report about QEMU into either 'user-mode' or 'system-mode'. The report mentions that QEMU-user ignores MADV_DONTNEED. Let me think about what each part means. QEMU has two main modes: user mode and system mode. User mode is used for running unmodified applications on different architectures without emulating the entire OS, which runs with lower privileges. System mode emulates a full computer system, including hardware peripherals and devices, requiring higher privileges. MADV_DONTNEED is a memory advice function in Linux that tells the kernel to free pages of a process if possible. If QEMU-user ignores this, it's likely related to how user-mode processes manage their memory without involving the host OS deeply. Since user mode deals with application-level processes and not full system emulation, the issue falls under user-mode. Therefore, this bug report is 'user' related. The bug report pertains to QEMU-user, which operates in user mode, dealing with application execution rather than system-level emulation. Thus, it's classified as a user-mode issue. user