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authorChuck Ebbert <76306.1226@compuserve.com>2006-03-23 02:59:34 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-23 07:38:04 -0800
commit4f88651125e2ca8b106b6f65b65ea45776517bf3 (patch)
treea9865c268c57bd1752a66899615d8694d5ddaea8 /Documentation
parent3bc9b76bede9b3c72088258c7e72eb823f3351d4 (diff)
[PATCH] i386: allow disabling X86_FEATURE_SEP at boot
Allow the x86 "sep" feature to be disabled at bootup. This forces use of the int80 vsyscall. Mainly for testing or benchmarking the int80 vsyscall code. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fc99075e0af..880be3a30d8 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1008,7 +1008,9 @@ running once the system is up.
noexec=on: enable non-executable mappings (default)
noexec=off: disable nn-executable mappings
- nofxsr [BUGS=IA-32]
+ nofxsr [BUGS=IA-32] Disables x86 floating point extended
+ register save and restore. The kernel will only save
+ legacy floating-point registers on task switch.
nohlt [BUGS=ARM]
@@ -1053,6 +1055,8 @@ running once the system is up.
nosbagart [IA-64]
+ nosep [BUGS=IA-32] Disables x86 SYSENTER/SYSEXIT support.
+
nosmp [SMP] Tells an SMP kernel to act as a UP kernel.
nosync [HW,M68K] Disables sync negotiation for all devices.