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SubjectRe: [patch 00/12] futex: Cure robust/PI futex exit races
Date
* Thomas Gleixner:

> The series is also available from git:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.locking/futex

I ran the glibc upstream test suite (which has some robust futex tests)
against b21be7e942b49168ee15a75cbc49fbfdeb1e6a97 on x86-64, both native
and 32-bit/i386 compat mode.

compat mode seems broken, nptl/tst-thread-affinity-pthread fails. This
is probably *not* due to
<https://bugzilla.kernel.org/show_bug.cgi?id=154011> because the failure
is non-sporadic, but reliable fails for thread 253:

info: Detected CPU set size (in bits): 225
info: Maximum test CPU: 255
error: pthread_create for thread 253 failed: Resource temporarily unavailable

I'm running this on a large box as root, so ulimits etc. do not apply.

I did not see this failure with the x86-64 test.

You should be able to reproduce with (assuming you've got a multilib gcc):

git clone git://sourceware.org/git/glibc.git git
mkdir build
cd build
../git/configure --prefix=/usr CC="gcc -m32" CXX="g++ -m32" --build=i686-linux
make -j`nproc`
make test t=nptl/tst-thread-affinity-pthread

Thanks,
Florian

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