Re: 2.6.1-mm1: drivers/video/sis/sis_main.c link error

From: Valdis . Kletnieks
Date: Mon Jan 12 2004 - 01:12:20 EST


On Sun, 11 Jan 2004 21:42:59 PST, Andrew Morton said:
> Gene Heskett <gene.heskett@xxxxxxxxxxx> wrote:
> > hubble of about 4 or 5 months back. In any other kernel, switching
> > to that window took about 12 seconds for the backdrop to be converted
> > to 1600x1200x32 and drawn the first time and about 8 seconds for the
> > next time. But with this 2.6.1-mm1 kernel, that repeat window switch
> > is so close to instant that I cannot see it being drawn.

> There are no significant fbdev patches in 2.6.1-mm1. There is a DRM
> update.

The 12 seconds coming and 8 seconds going, versus instant, sounds an *awful*
lot like the virtual memory manager making better choices in -mm kernels, so
the pages of pixmap are staying in memory rather than paging out.

Other guess is that o21-sched.patch is DTRT, while the stock scheduler DTWT
for his particular config.

Gene: Can you tell what exactly your system is doing for the 12/8 seconds? Is it
CPU bound, or beating on the disk while paging in/out, or just sitting idle? Leaving
a 'vmstat 1' running while you change backdrops should tell us something.

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