From 6e7c402590b75b6b45138792445ee0f0315a8473 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 30 Jan 2008 13:30:05 +0100 Subject: 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 Signed-off-by: Thomas Gleixner Tested-by: "David P. Reed" --- Documentation/kernel-parameters.txt | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'Documentation') 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 then look in the higher range. io_delay= [X86-32,X86-64] I/O delay method - standard - Standard port 0x80 delay - alternate - Alternate port 0xed delay + 0x80 + Standard port 0x80 based delay + 0xed + Alternate port 0xed based delay (needed on some systems) udelay - Simple two microsecond delay + Simple two microseconds delay + none + No delay io7= [HW] IO7 for Marvel based alpha systems See comment before marvel_specify_io7 in -- cgit v1.2.3-59-g8ed1b