On 06/01/2018 15:12, Carlos E. R. wrote:
Hi,
I would like to benchmark my computer before applying patches for the recent Intel fiasco.
Suggestions? I can't recommend a benchmark but the patch description gives two kernel command line options for turning off: - CVE-2017-5715 / "SpectreAttack": Local attackers on systems with modern CPUs featuring branch prediction could use mispredicted branches to speculatively execute code patterns that in turn could be made to leak other non-readable content in the same address space, an attack similar to CVE-2017-5753.
This problem is mitigated by disabling predictive branches, depending on CPU architecture either by firmware updates and/or fixes in the user-kernel privilege boundaries. Please also check with your CPU / Hardware vendor on updated firmware or BIOS images regarding this issue. As this feature can have a performance impact, it can be disabled using the "nospec" kernel commandline option. - CVE-2017-5754 / "MeltdownAttack": Local attackers on systems with modern CPUs featuring deep instruction pipelining could use code patterns in userspace to speculative executive code that would read otherwise read protected memory, an attack similar to CVE-2017-5753. This problem is mitigated by unmapping the Linux Kernel from the user address space during user code execution, following a approach called "KAISER". The terms used here are "KAISER" / "Kernel Address Isolation" and "PTI" / "Page Table Isolation". Note that this is only done on affected platforms. This feature can be enabled / disabled by the "pti=[on|off|auto]" or "nopti" commandline options. Dave P -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org