Comment 203 for bug 252094

(In reply to comment #28)

> Carl, do you think if we can point out which patch (or patches) that fixed the
> performance regression issue?

If I knew, I would be glad to share them. But sadly, I don't.

> Even some clues of how to find them,

First, identify which component (or combination of components) is causing the problem. The latest stuff that's working well is the for-review branch of anholt's kernel tree, the master branch of the xf86-video-intel driver and the master branch of the xserver repository. If a single component can be identified as the culprit, then it should be a simple matter of doing a bisect to find the specific commit(s) of interest.

But I can't guarantee that there's some simple commit that can be backported. The issue could depend on large infrastructural changes in the kernel that may not be feasible to put into whatever release is of interest here.

> or our
> graphics driver in Novell's SLED11 has big problems in performance, especially
> for those hardware that can work very well on SLED10.

That's really an issue for Novell to address. We've identified that our latest code does not have this problem. Again, when our code is having problems, then we will be happy to put time into fixing them.

Thanks,

-Carl