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spectre_and_meltdown_fixes_-_release_dates_for_linux_distros [18.04.2018 14:35]
Pascal Suter [3: Update your BIOS]
spectre_and_meltdown_fixes_-_release_dates_for_linux_distros [24.10.2018 21:40] (current)
Pascal Suter [Performance Impact]
Line 129: Line 129:
 echo 0 > /​sys/​kernel/​debug/​x86/​ibpb_enabled echo 0 > /​sys/​kernel/​debug/​x86/​ibpb_enabled
 echo 0 > /​sys/​kernel/​debug/​x86/​ibrs_enabled echo 0 > /​sys/​kernel/​debug/​x86/​ibrs_enabled
 +echo 0 > /​sys/​kernel/​debug/​x86/​retp_enabled
 </​code>​ </​code>​
 by default all three fixes are enabled, if you want to disable them permanently (=on every boot) you can add these three options to your kernel command line:  by default all three fixes are enabled, if you want to disable them permanently (=on every boot) you can add these three options to your kernel command line: 
 <​code>​ <​code>​
-noibrs noibpb nopti+noibrs noibpb nopti noretp spectre_v2=off
 </​code>​ </​code>​
 +the last ''​spectre_v2=off''​ is redhat/​CentOS specific and might be redundant with the previous ones.