[Bug 15845] New: X busyloops when huge image in firefox

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15845

           Summary: X busyloops when huge image in firefox
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: pq-X3B1VOXEql0@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created an attachment (id=16388)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16388)
Xorg log

When a huge image, e.g. 1500x3000 pixels, is shown in Firefox, any rendering
action related to that image freezes firefox for 5-10 minutes. During that time
X is eating all CPU, spending 30% in user space and 70% in kernel due to
GetTimeInMillis().

Xorg-server xorg-server-1.3.99.0-1538-gefa65a0
xf86-video-nouveau ae574ec7d930d8708e4dd9d1d47558666019afe5
DRM kernel modules drm-2.3.0-1229-g43b224f
All of them around 5.5.2008.

nouveau.ko is patched to make AGP init fail, since DFS is broken for me.

To me DRM and Xorg logs show nothing out of the ordinary.


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