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From: Greg KH <gregkh@linuxfoundation.org>
To: "Ionut Nechita (Wind River)" <ionut.nechita@windriver.com>
Cc: namcao@linutronix.de, brauner@kernel.org,
	linux-fsdevel@vger.kernel.org, linux-rt-users@vger.kernel.org,
	stable@vger.kernel.org, linux-kernel@vger.kernel.org,
	frederic@kernel.org, vschneid@redhat.com,
	chris.friesen@windriver.com,
	viorel-catalin.rapiteanu@windriver.com,
	iulian.mocanu@windriver.com
Subject: Re: [REGRESSION] osnoise: "eventpoll: Replace rwlock with spinlock" causes ~50µs noise spikes on isolated PREEMPT_RT cores
Date: Thu, 26 Mar 2026 15:52:20 +0100	[thread overview]
Message-ID: <2026032640-gangly-sprout-099b@gregkh> (raw)
In-Reply-To: <20260326140058.272854-1-ionut.nechita@windriver.com>

On Thu, Mar 26, 2026 at 04:00:57PM +0200, Ionut Nechita (Wind River) wrote:
> Hi,
> 
> I'm reporting a regression introduced by commit 0c43094f8cc9
> ("eventpoll: Replace rwlock with spinlock"), backported to stable 6.12.y.

Does this regression also show up in the 6.18 release and newer?  If so,
please work to address it there first, as that is where it needs to be
handled first.

thanks,

greg k-h

  parent reply	other threads:[~2026-03-26 14:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-26 14:00 [REGRESSION] osnoise: "eventpoll: Replace rwlock with spinlock" causes ~50µs noise spikes on isolated PREEMPT_RT cores Ionut Nechita (Wind River)
2026-03-26 14:31 ` Sebastian Andrzej Siewior
2026-03-26 14:52 ` Greg KH [this message]
2026-03-26 16:21   ` Ionut Nechita (Wind River)
2026-03-26 18:12 ` Crystal Wood

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