From 9ce883becb83190061369940de9c415595836c9b Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 24 Apr 2007 13:05:37 +0200 Subject: [PATCH] x86: Remove noreplacement option noreplacement is dangerous on modern systems because it will not replace the context switch FNSAVE with SSE aware FXSAVE. But other places in the kernel still assume SSE and do FXSAVE and the CPU will then access FXSAVE information with FNSAVE and cause corruption. Easiest way to avoid this is to remove the option. It was mostly for paranoia reasons anyways and alternative()s have been stable for some time. Thanks to Jeremy F. for reporting and helping debug it. Signed-off-by: Andi Kleen --- Documentation/x86_64/boot-options.txt | 4 ---- 1 file changed, 4 deletions(-) (limited to 'Documentation/x86_64') diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index 625a21db0c2a..85f51e5a749f 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -293,7 +293,3 @@ Debugging stuck (default) Miscellaneous - - noreplacement Don't replace instructions with more appropriate ones - for the CPU. This may be useful on asymmetric MP systems - where some CPUs have less capabilities than others. -- cgit v1.2.3-59-g8ed1b