Debian

How to disable page table isolation on debian

After meltdown, spectre and other similar bugs were discoreved and patched the overall performance on Linux decreased. Here a detailed benchmark about the impact of these fixes on Redis performance. Something between 15% and 6% slower than the same machine without the fixes. Check your linux To check if the fixes are enabled run the command bellow: grep CONFIG_PAGE_TABLE_ISOLATION=y /boot/config-`uname -r` && echo "enabled" || echo "disabled" grep -q "cpu_insecure\|cpu_meltdown\|kaiser" /proc/cpuinfo && echo "enabled" || echo "disabled" sudo dmesg | grep -q "Kernel/User page tables isolation: enabled" && echo "enabled" || echo "disabled" You can also check your system using this exploit. Read More...