Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756797Ab0GWAV3 (ORCPT ); Thu, 22 Jul 2010 20:21:29 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:45153 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756551Ab0GWAV0 (ORCPT ); Thu, 22 Jul 2010 20:21:26 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:date:message-id:subject:from:to:cc :content-type; b=YdU8eUDn256OcbjfJs/HSm6ynQEnLYhYLJOUGPRCy6cP6Rv8x4AlKZ8Uk4EGqbFc6A iCLCv/ObesjGVKk1aTRukohcWXlRp3QI4N+a6AxBXUmzmbPRr9EEM0v9Lhy9utJPQXE6 L0aIDi9oNTi2+dFsNYaV0YwJur9rat5rOJRrc= MIME-Version: 1.0 Reply-To: trapdoor6@gmail.com Date: Fri, 23 Jul 2010 01:21:24 +0100 Message-ID: Subject: 2.6.35-rc[1-5] + Radeon-kms: 3D graphic performance From: trapDoor To: Alex Deucher Cc: LKML , trapDoor Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4790 Lines: 119 Hi Alex, This is with regard to thread 'Blank (disconnected) screen during boot with latest 2.6.35-rcX kernels'. You asked me in your last e-mail if I could do a bisect to find out what caused a regression I mentioned about - in 3D graphic performance in kernels 2.6.35-rc + radeoon-kms. I started the bisect but unfortunately I haven't finished due to some problems I came across and I'm not sure if I can continue it. I'm pointing below how the bisect went and - if you'd like to take a look - at the last point I explained why I stopped. I did notice some pattern during this unfinished bisect though. And I think it may narrow down the regression to its source. ------ 1. boot from 2.6.35-rc5-git4: git-clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git linus-git cd linux-git git bisect start # marking kernel 2.6.35-rc1 as bad git bisect bad 67a3e12b05e055c0415c556a315a3d3eb637e29e # marking kernel 2.6.34 as good git bisect good e40152ee1e1c7a63f4777791863215e3faa37a86 Bisecting: 4139 revisions left to test after this (roughly 12 steps) [f8965467f366fd18f01feafb5db10512d7b4422c] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 ------ 2. boot from 2.6.34-04401-gf896546 [f8965467f366fd18f01feafb5db10512d7b4422c] git bisect good Bisecting: 1978 revisions left to test after this (roughly 11 steps) [d79df0b1eda0099a22cbcece01ce5e7d222450de] Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 ------ 3. boot from 2.6.34-06562-gd79df0b [d79df0b1eda0099a22cbcece01ce5e7d222450de] git bisect bad Bisecting: 1102 revisions left to test after this (roughly 10 steps) [ac3ee84c604502240122c47b52f0542ec8774f15] Merge branch 'dbg-early-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb ------ 4. boot from 2.6.34-05459-gac3ee84 [ac3ee84c604502240122c47b52f0542ec8774f15] git bisect good Bisecting: 551 revisions left to test after this (roughly 9 steps) [7a6cb0d5497418599d2125b670926b75e673861c] Staging: Use kcalloc or kzalloc ------ 5. boot from 2.6.34-rc6-00551-g7a6cb0d [7a6cb0d5497418599d2125b670926b75e673861c] git bisect good Bisecting: 239 revisions left to test after this (roughly 8 steps) [79c4581262e225a7c96d88b632b05ab3b5e9a52c] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc ------ 6. boot from 2.6.34-05771-g79c4581 [79c4581262e225a7c96d88b632b05ab3b5e9a52c] git bisect bad Bisecting: 155 revisions left to test after this (roughly 7 steps) [5876dd249e8e47c730cac090bf6edd88e5f04327] radeon: Unmap vram pages when reclocking ------ 7. boot from 2.6.34-rc5-00156-g5876dd2 [5876dd249e8e47c730cac090bf6edd88e5f04327] At this point I get stuck as I'm unable to perform the tests: -- Gnome fails to start, system freezes right after logging in -- KDE starts but it's almost unusable - very poor 2D performance and 3D seems to not work at all: desktop lost support for transparency/translucency glxgears: just a black window appears with no gears; in the output console it shows this: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 36 requests (36 known processed) with 0 events remaining. Armagetron Advanced obviously doesn't work either - as above, just a black window comes up -- under minimal X environment (xterm) glxgears and Armagetron Advanced behave the same way as above Now I don't know if I can/how to continue this bisect. Clearly 2.6.34-rc5-00156-g5876dd2 is affected in the area I was testing. But differently and to the degree where I'm actually unable to test what I was testing. Also these issues may be not related to the original regression. They may be caused by different commit(s). To sum up: I can't specify whether kernel 2.6.34-rc5-00156-g5876dd2 is good or bad, in order to continue this bisect. Maybe I should start another bisect to solve the problem caused by this kernel, revert/apply appropriate patch(es) and then continue with the original bisect ? And then, with the next kernel, I may be able to carry on or I may be not and have to repeat what I did as a result of the 2nd bisect. Or I may bump into some other problems and have to start 3rd bisect ... I imagine that people can get into such traps but there must be some ways to solve it quicker and not get into endless bisect loop. Of course I'm not saying all this to show that I'm getting discouraged. Not at all - the more I learn about git the more I like it. It's magic, some people say - and I think they may be right. -- Regards trapDoor -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/