malloc/free and priority inheritance?

[Darren Hart]

On 04/04/2013 08:39 AM, Siddhesh Poyarekar wrote:
> On 4 April 2013 20:39, Stanislav Meduna <stano@meduna.org> wrote:
>> The first thing e.g. the __pthread_cond_broadcast (and most of the
>> other functions as well) does is to grab lll_lock. Is the following
>> scenario possible?
> 
> Yes this is possible.  I think there is a bug report that describes
> this.  We need to convert the pthread_cond_t internal lock into a PI
> one if the mutex guarding it is PI.  It's probably tricky to do
> though; I haven't thought it through.

I have patches out on the glibc alpha list that do this. It is on my
plate to dust these off, reapply and test them, and try to push them
again, I just haven't been able to get to it.

Patches and test cases available here:
http://sourceware.org/bugzilla/show_bug.cgi?id=11588

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel