2.6.9-rc1: scrolling with tdfxfb 5 times slower

Paolo Ornati
2004-09-01T00:59:17Z

The recent changes in frame buffer code seems to affect performance of
scrolling on my system:

Voodoo Banshee (tdfxfb)

CONFIG:
#
# Graphics support
#
CONFIG_FB=y
CONFIG_FB_3DFX=y
# CONFIG_FB_3DFX_ACCEL is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_MDA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y

Tests with "linux/MAINTAINERS" (time cat MAINTAINERS)
2.6.8.1
real 0m2.625s
user 0m0.000s
sys 0m2.621s

2.6.9-rc1
real 0m13.528s
user 0m0.000s
sys 0m13.553s

Also many -mm kernels are affected... this is obvious because these patches
come from Andrew's tree ;-)

Any ideas?

--
Paolo Ornati
Gentoo Linux (kernel 2.6.9-rc1)