linux-kernel - Re: [patch 12/12] selftests/rseq: Implement time slice extension test

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Message-ID: <15213575-f329-49b2-8e32-2b137e4221f0@amd.com>
Date: Wed, 10 Sep 2025 16:53:11 +0530
From: K Prateek Nayak <kprateek.nayak@....com>
To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>
CC: Peter Zilstra <peterz@...radead.org>, Mathieu Desnoyers
	<mathieu.desnoyers@...icios.com>, "Paul E. McKenney" <paulmck@...nel.org>,
	Boqun Feng <boqun.feng@...il.com>, Jonathan Corbet <corbet@....net>, "Prakash
 Sangappa" <prakash.sangappa@...cle.com>, Madadi Vineeth Reddy
	<vineethr@...ux.ibm.com>, Steven Rostedt <rostedt@...dmis.org>, "Sebastian
 Andrzej Siewior" <bigeasy@...utronix.de>, Arnd Bergmann <arnd@...db.de>,
	<linux-arch@...r.kernel.org>
Subject: Re: [patch 12/12] selftests/rseq: Implement time slice extension test

Hello Thomas,

On 9/9/2025 4:30 AM, Thomas Gleixner wrote:
> Provide an initial test case to evaluate the functionality. This needs to be
> extended to cover the ABI violations and expose the race condition between
> observing granted and ariving in rseq_slice_yield().

nit. s/ariving/arriving/

I finally managed to trigger that cheeky race condition too :)

# Starting 2 tests from 2 test cases.
#  RUN           slice_ext.n2_2_50.slice_test ...
# Success        2088616
# Yielded          45097
# Scheduled          174
# Raced                2
#            OK  slice_ext.n2_2_50.slice_test

-- 
Thanks and Regards,
Prateek