Re: [PATCH 4/10] atyfb: set FBINFO_READS_FAST

From: Linus Torvalds
Date: Thu Jan 23 2014 - 14:23:39 EST

Hmm. You're doing this for Matrix and now the aty driver.

Maybe the problem is at the fbcon level? Depending on
FBINFO_READS_FAST to decide whether you should scroll or rewrite
sounds a bit silly: even if a device doesn't have fast reads, maybe it
has a fast accelerated BLIT operation and scrolls quickly. Should the
fbcon test perhaps be for FBINFO_READS_FAST _or_ the

I dunno. I didn't actually check the ->bcopy implementations, maybe
they don't use copyarea. So I'm just going by a general "this feels
wrong" feeling..


On Thu, Jan 23, 2014 at 10:18 AM, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:
> Set FBINFO_READS_FAST so that the console code uses scrolling instead of
> rewriting. This improves scrolling speed.
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