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    SubjectRe: Bisecting radeon kms freeze bug: Almost there, please help with choosing next commit
    From
    On Tue, Sep 7, 2010 at 10:34 AM, Martin Steigerwald <Martin@lichtvoll.de> wrote:
    >
    > Hello Alex and und Dave,
    >
    > please excuse typing errors. The machine is abysmally slow with that
    > kernel.
    >
    > I am almost there with bisecting Bug 16376, random - possibly Radeon DRM
    > KM related - freezes. I think I found the merge where is issue has been
    > introduced and I am now testing
    >
    > martin@shambhala:~/Computer/Shambhala/Kernel/2.6.33-2.6.34-
    > bisect/linux-2.6> git log | head
    > commit 6ad86c311a8b8a6d856527a1b6ba21790ab7054b
    > Author: Alex Deucher <alexdeucher@gmail.com>
    > Date:   Thu Feb 11 10:47:52 2010 -0500
    >
    >    drm/radeon/kms: remove HDP flushes from fence emit (v2)
    >
    >    r600_ioctl_wait_idle() now handles this.
    >
    >    v2: update blit fence counts
    >
    > Unfortunately it has some other issues that has been fixed later on prior
    > to 2.6.34 already:
    >
    > 7.9.2010 - 2.6.32-tp42-00514-g6ad86c3
    > 6ad86c311a8b8a6d856527a1b6ba21790ab7054b
    > - Sluggy desktop. Short pauses, locks of about a second.
    > - Slow scroll performance on tty.
    > - No complete freeze yet.
    > - Much CPU time used in system:70-90%
    >
    > You know the changes in that merge better than me. Can you recommend which
    > commits to test next? Som commits may require other ones and thus it might
    > be wise to choose the next commits with that in mind. Maybe you already
    > have an idea which one it could be. I thought about the memory controllr
    > v2 changes, but I really don't have the foggiest.

    This might be a duplicate of:
    https://bugs.freedesktop.org/show_bug.cgi?id=28402
    Does the patch there help?

    Alex

    >
    >
    > Here is excerpt from atop which shows ridicully high system CPU usage with
    > that kernel.
    >
    > ATOP - shambhala          2010/09/07  16:11:22               10 seconds
    > elapsed
    > PRC | sys   8.66s | user   1.30s | #proc    195 | #zombie    0 | #exit
    > 0 |
    > CPU | sys     85% | user     11% | irq       4% | idle      0% | wait
    > 0% |
    > CPL | avg1   3.39 | avg5    3.80 | avg15   3.25 | csw    18458 | intr
    > 11472 |
    > MEM | tot    2.0G | free  543.1M | cache 759.6M | buff   95.0M | slab
    > 37.8M |
    > SWP | tot    3.8G | free    3.8G |              | vmcom   1.3G | vmlim
    > 4.8G |
    > DSK |         sda | busy      3% | read       1 | write     95 | avio    2
    > ms |
    >
    > I wrote by mail since bugzilla has too many MySQL connections again. Maybe
    > bug can be switched to mail?
    >
    > Rebooting and testing this kernel another time whether it hard freezes,
    > --
    > Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
    > GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
    >
    --
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