[Bug 28411] New: Output polling causes latency every 10 seconds

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28411

           Summary: Output polling causes latency every 10 seconds
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: General
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: marius.groeger at web.de


The output polling in drm_crtc_helper.c added in this commit:

commit eb1f8e4f3be898df808e2dfc131099f5831d491d
Author: Dave Airlie <airlied at redhat.com>
Date:   Fri May 7 06:42:51 2010 +0000 

causes drm latencies every 10 seconds. I observed them in mythtv.

Apparently the dev->mode_config.mutex is held for too long; if I remove the
mutex_lock/unlock for testing purposes the latencies are gone.

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