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authorAndi Kleen <ak@suse.de>2006-03-25 16:31:31 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:14:38 -0800
commitba22f13563de5773701fc318ccaaa37b1fb6d294 (patch)
treee29ddeaca4c9f7b1b5ef08804980600d0e089f5b /arch
parent9d95dd849ccc43c4b21504e1829b5bed68cdb1bc (diff)
downloadop-kernel-dev-ba22f13563de5773701fc318ccaaa37b1fb6d294.zip
op-kernel-dev-ba22f13563de5773701fc318ccaaa37b1fb6d294.tar.gz
[PATCH] x86_64: Remove CONFIG_UNORDERED_IO
It was a failed experiment - all benchmarks done with it on both AMD and Intel showed it was a loss. That was probably because the store buffers of the CPUs for write combining traffic weren't large enough. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/Kconfig10
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 6fc6314..31bab72 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -520,16 +520,6 @@ config PCI_MMCONFIG
bool "Support mmconfig PCI config space access"
depends on PCI && ACPI
-config UNORDERED_IO
- bool "Unordered IO mapping access"
- depends on EXPERIMENTAL
- help
- Use unordered stores to access IO memory mappings in device drivers.
- Still very experimental. When a driver works on IA64/ppc64/pa-risc it should
- work with this option, but it makes the drivers behave differently
- from i386. Requires that the driver writer used memory barriers
- properly.
-
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"
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