linux-kernel - Re: commit cfafcd117 "futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock()" causes glibc nptl/tst-robustpi8 failure

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Date:   Thu, 18 May 2017 09:40:54 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:     linux-kernel@...r.kernel.org, fweimer@...hat.com,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: commit cfafcd117 "futex: Rework futex_lock_pi() to use
 rt_mutex_*_proxy_lock()" causes glibc nptl/tst-robustpi8 failure

On Wed, May 17, 2017 at 07:36:46PM +0200, Markus Trippelsdorf wrote:
> Since:
> commit cfafcd117da0216520568c195cb2f6cd1980c4bb
> Author: Peter Zijlstra <peterz@...radead.org>
> Date:   Wed Mar 22 11:35:58 2017 +0100
> 
>     futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock()
> 
> glibc's nptl/tst-robustpi8 testcase fails:
> 
> glibc-build % ./nptl/tst-robustpi8
> tst-robustpi8: ../nptl/pthread_mutex_lock.c:424: __pthread_mutex_lock_full: Assertion `INTERNAL_SYSCALL_ERRNO (e, __err) != ESRCH || !robust' failed.

OK, so how do I get those tests build?

I did a checkout of glibc.git

glibc$ mkdir build; cd build
build$ ../configure --disable-sanity-checks ; make -j40
build$ ./nptl/tst-robustpi8
-bash: ./nptl/tst-robustpi8: No such file or directory

"make tests" doesn't seem to work either even though its a build target
listed in the Makefiles.

What magic incantation do I need?