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authorIngo Molnar <mingo@elte.hu>2008-01-30 07:30:05 -0500
committerIngo Molnar <mingo@elte.hu>2008-01-30 07:30:05 -0500
commit6e7c402590b75b6b45138792445ee0f0315a8473 (patch)
tree94db814d496502932ab55acc560a728925f87540 /Documentation
parentb02aae9cf52956dfe1bec73f77f81a3d05d3902b (diff)
x86: various changes and cleanups to in_p/out_p delay details
various changes to the in_p/out_p delay details: - add the io_delay=none method - make each method selectable from the kernel config - simplify the delay code a bit by getting rid of an indirect function call - add the /proc/sys/kernel/io_delay_type sysctl - change 'io_delay=standard|alternate' to io_delay=0x80 and io_delay=0xed - make the io delay config not depend on CONFIG_DEBUG_KERNEL Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: "David P. Reed" <dpreed@reed.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt12
1 files changed, 7 insertions, 5 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9e6056058425..b427b7c0e5d0 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -795,12 +795,14 @@ and is between 256 and 4096 characters. It is defined in the file
795 then look in the higher range. 795 then look in the higher range.
796 796
797 io_delay= [X86-32,X86-64] I/O delay method 797 io_delay= [X86-32,X86-64] I/O delay method
798 standard 798 0x80
799 Standard port 0x80 delay 799 Standard port 0x80 based delay
800 alternate 800 0xed
801 Alternate port 0xed delay 801 Alternate port 0xed based delay (needed on some systems)
802 udelay 802 udelay
803 Simple two microsecond delay 803 Simple two microseconds delay
804 none
805 No delay
804 806
805 io7= [HW] IO7 for Marvel based alpha systems 807 io7= [HW] IO7 for Marvel based alpha systems
806 See comment before marvel_specify_io7 in 808 See comment before marvel_specify_io7 in