From: Florian Weimer <fweimer@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Darren Hart <darren@dvhart.com>,
Yi Wang <wang.yi59@zte.com.cn>, Yang Tao <yang.tao172@zte.com.cn>,
Oleg Nesterov <oleg@redhat.com>,
Carlos O'Donell <carlos@redhat.com>,
Alexander Viro <viro@zeniv.linux.org.uk>
Subject: Re: [patch 00/12] futex: Cure robust/PI futex exit races
Date: Thu, 07 Nov 2019 23:40:43 +0100 [thread overview]
Message-ID: <87v9rv8g44.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <87zhh78gnf.fsf@oldenburg2.str.redhat.com> (Florian Weimer's message of "Thu, 07 Nov 2019 23:29:08 +0100")
* Florian Weimer:
> * 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
Sorry, I realized that I didn't actually verify that this is a
regression caused by your patches. Maybe I can do that tomorrow.
Florian
next prev parent reply other threads:[~2019-11-07 22:41 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 21:55 [patch 00/12] futex: Cure robust/PI futex exit races Thomas Gleixner
2019-11-06 21:55 ` [patch 01/12] futex: Prevent robust futex exit race Thomas Gleixner
2019-11-06 21:55 ` [patch 02/12] futex: Move futex exit handling into futex code Thomas Gleixner
2019-11-07 9:24 ` Peter Zijlstra
2019-11-07 9:38 ` Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-16 20:53 ` Borislav Petkov
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 03/12] futex: Replace PF_EXITPIDONE with a state Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 04/12] exit/exec: Seperate mm_release() Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 05/12] futex: Split futex_mm_release() for exit/exec Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 06/12] futex: Set task::futex state to DEAD right after handling futex exit Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] futex: Set task::futex_state " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 07/12] futex: Mark the begin of futex exit explicitly Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 08/12] futex: Sanitize exit state handling Thomas Gleixner
2019-11-07 9:38 ` Peter Zijlstra
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 09/12] futex: Provide state handling for exec() as well Thomas Gleixner
2019-11-07 9:49 ` Peter Zijlstra
2019-11-07 9:54 ` Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 10/12] futex: Add mutex around futex exit Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 11/12] futex: Provide distinct return value when owner is exiting Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-06 21:55 ` [patch 12/12] futex: Prevent exit livelock Thomas Gleixner
2019-11-15 18:19 ` [tip: locking/core] " tip-bot2 for Thomas Gleixner
2019-11-20 9:38 ` tip-bot2 for Thomas Gleixner
2019-11-07 8:29 ` [patch 00/12] futex: Cure robust/PI futex exit races Ingo Molnar
2019-11-07 8:41 ` Ingo Molnar
2019-11-07 9:40 ` Peter Zijlstra
2019-11-07 15:03 ` Oleg Nesterov
2019-11-07 22:29 ` Florian Weimer
2019-11-07 22:40 ` Florian Weimer [this message]
2019-11-08 7:38 ` Florian Weimer
2019-11-08 9:18 ` Thomas Gleixner
2019-11-08 10:17 ` Florian Weimer
2019-11-08 10:37 ` Thomas Gleixner
2019-11-08 11:51 ` Thomas Gleixner
2019-11-11 9:48 ` Florian Weimer
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