Re: compositing broken in -next (idr bug)
From: Jiri Slaby
Date: Tue Feb 12 2013 - 17:00:11 EST
On 02/12/2013 10:58 PM, Tejun Heo wrote:
> Hello, Jiri.
> On Tue, Feb 12, 2013 at 10:55:37PM +0100, Jiri Slaby wrote:
>> this commit in -next causes my KDE to get stuck while starting. I see
>> only the splash screen. If I disable effects by alt-shift-f12, it continues.
>> I bisected it to this commit:
>> commit 430440fce7da4ad52c2af06a04a5132e5d19faaf
>> Author: Tejun Heo <tj@xxxxxxxxxx>
>> Date: Thu Feb 7 12:31:37 2013 +1100
>> drm: convert to idr_alloc()
>> More concretely to the change in drm_gem_flink_ioctl. If I revert solely
>> that one, it works again. Maybe I'm blind, but I do not see why...
>> Well I see a bug in there, but that is not the root cause -- there is a
>> missing call to idr_preload_end. Of course, that one only leaves
>> preemption disabled forever.
> Fix for this bug is already queued in -mm.
> But you're saying that adding the missing idr_preload_end() doesn't
> make the problem go away, right?
Yeah, right. I had to revert the whole hunk...
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