[Xen-devel] [patch] linux-2.6 performance fix

[David Becker <becker@xxxxxxxxxxx>]

This patch for linux-2.6 defconfig more than quadrupled iperf throughput,
restoring the gigethernet network performance to wire speed at long last.
Applies to xen-2.0-testing.bk xen-2.0.bk and xeno-unstable.bk

The throughput on linux-2.4.29 seems fine.  I hadn't tried it since 2.4.27.

The relevant sccs comment, from Dec1:

======== linux-2.6.10-xen-sparse/arch/xen/configs/xen0_defconfig 1.26.2.1 
========
D 1.26.2.1 04/12/01 11:24:10+00:00 kaf24@xxxxxxxxxxxxxxxxxxxxx 33 30 3/3/1037
P linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig
C Enable some more kernel debugging. Remember to turn off before
C pushing to the stable repository!
------------------------------------------------


===== linux-2.6.10-xen-sparse/arch/xen/configs/xen0_defconfig 1.36 vs edited 
=====
165c165
< CONFIG_DEBUG_SLAB=y
---
> # CONFIG_DEBUG_SLAB is not set
168c168
< CONFIG_DEBUG_PAGEALLOC=y
---
> # CONFIG_DEBUG_PAGEALLOC is not set
===== linux-2.6.10-xen-sparse/arch/xen/configs/xenU_defconfig 1.28 vs edited 
=====
135c135
< CONFIG_DEBUG_SLAB=y
---
> # CONFIG_DEBUG_SLAB is not set
138c138
< CONFIG_DEBUG_PAGEALLOC=y
---
> # CONFIG_DEBUG_PAGEALLOC is not set



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