Re: [PATCH 3.14.25-rt22 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at kernel/locking/rtmutex.c:997!

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On Fri, 6 Mar 2015 13:19:21 +0100
Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:

> * Steven Rostedt | 2015-02-26 09:06:10 [-0500]:
> 
> >If we can pull that off and remove all rtmutex trylocks from hardirq
> >context, I would much rather do that.
> >
> >This hocus pocus coding is just going to lead us down the path of the
> >black arts. I already have a black cat, so I'm good to go.
> 
> Okay. So what is the fix for v3.14 and other trees where the rtmutex
> reworked has been integrated? Revert the optimization like I did in
> v3.18?

Probably.

I'm going to start looking at what's in 3.18 and start porting changes
to 3.14 and earlier. I've only been updating the stable kernels to pull
in the mainline stable updates. I haven't reverted anything (unless
mainline stable caused things to be obsolete), nor have I added any
updates.

BTW, I'm going to start with 3.18-rt1 and see what's been added to the
other -rt updates. If there's something I need that was added to
3.18-rt1 can you let me know. That is, if it wasn't marked with a
stable-rt tag. My scripts will find those.

-- Steve
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