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

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

[bugzilla-daemon]

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@lists.freedesktop.org
        ReportedBy: marius.groeger@web.de


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

commit eb1f8e4f3be898df808e2dfc131099f5831d491d
Author: Dave Airlie <airlied@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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[Bug 28411] Output polling causes latency every 10 seconds

[bugzilla-daemon]

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

--- Comment #1 from Marius Groeger <marius.groeger@web.de> 2010-07-19 00:09:58 PDT ---
This is a humble *bump* on the issue - I saw that the latest d-r-t and d-n (let
alone d-f) don't contain a fix for it. Anything else you need from me to fix
it?

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[Bug 28411] Output polling causes latency every 10 seconds

[bugzilla-daemon]

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

Marius Groeger <marius.groeger@web.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #2 from Marius Groeger <marius.groeger@web.de> 2010-08-02 23:04:24 PDT ---
Fixed in 2.6.35 final, 29508eb66bfacdef324d2199eeaea31e0cdfaa29
drm/radeon/kms: drop taking lock around crtc lookup.

Thanks Dave!

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