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From: "balint at balintreczey dot hu" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/25847] pthread_cond_signal failed to wake up
 pthread_cond_wait due to a bug in undoing stealing
Date: Thu, 07 Jan 2021 07:31:29 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25847

--- Comment #20 from Balint Reczey <balint at balintreczey dot hu> ---
This bug is also tracked in Ubuntu at
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899800 .
Qin Li's patch is already included in Ubuntu's development series to rather
have a minor performance regression than the occasional deadlock.
The patch is also being back-ported to Ubuntu 20.10 and will be back-ported=
 to
Ubuntu 20.04 LTS after the performance impact is known better, unless a bet=
ter
fix is developed.

Measurement results about the performance impact of Qin Li's patch is highly
welcome either on Ubuntu 20.10 or on any other system.

--=20
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