From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 107034A23 for ; Sun, 20 Jul 2025 10:47:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753008448; cv=none; b=GxBr5+2K6vGJ7DwxIP90UWl6yTwV4i3L6QIb8vk5IorZUfscKT8jFe4qYFatHgjjuyE7OieQfHSk6MB1PDnk8bqdddEoFt2D0WauNTckpYwsp3Zmf8epnPOBZY3IY5xD6tko92/1SxJS2k9yPLpL7Y/6bLsQYlDMAhUH78Zt6vQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753008448; c=relaxed/simple; bh=7T4UmPxWF3hSWenvaR7LWVE1ExSGnC3YDZZYQPXcU8w=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=D4XimjRmandeIuBWQoD5GlgVIszIKM7qF25TIuCEc9g0TPhGvxi6lsyWKfHIBrEFa4El1D3kpC8vG5ApIX+nvrUYZ5IFTqrP/UcBvnMkzLecESgQhVV32+F1XrbXUMgbFUi8ja65nNHJDodLDLequEjVWHrVcjuMRZUbd1X0uvs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=w7Wu5ruZ; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=e+TrRVpZ; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="w7Wu5ruZ"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="e+TrRVpZ" From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1753008445; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ANWoogU7kBBZFJXWHTAlyNcWlCwd/ZfUPzBFIAyZehI=; b=w7Wu5ruZFGwOqp7it3tXXteBEKIWBOprt2uL9Hcl6oPOWrZxZdil4/iAQxHmWBldpzAU3O ZQsMpXlddStAxyQ9coVQUam3X2ep1utRzfk1TdWFDkD0lbFb9o4tVkkmx23/GAkFerPOi4 PgzQxgP+hRMYB10tKvInolgWAfaoe24FFL0TZBjZIG8xRs9wL6PC26GNJefcXlvFR9IyYr 6O6apjbemjTcR0uzerDrGmqZOWI5c4vwYgn/NVi5FiMiYAAEKU0YATGGiFNEdgWbxlhGh0 w4PVLiJdLzzuduICJmOebSe19ZS922t8l8quLfzjfucyHniEJQmddXuicOcYPQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1753008445; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ANWoogU7kBBZFJXWHTAlyNcWlCwd/ZfUPzBFIAyZehI=; b=e+TrRVpZ4Aw3Y0AoXDbJCmp1H6ianIJdnWhcFJHGcPgqnyFhOZ8JxVuyzQrDF+4/WfGCbW 0icJxHeyKrA9VsAQ== To: Phil Auld Cc: Jan Kiszka , Henning Schild , Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar , Borislav Petkov , Guenter Roeck , xenomai@xenomai.org, guocai.he.cn@windriver.com, pauld@redhat.com Subject: Re: sched: Unexpected reschedule of offline CPU#2! In-Reply-To: <87frervq1o.ffs@tglx> References: <20190729101349.GX31381@hirez.programming.kicks-ass.net> <20190729104745.GA31398@hirez.programming.kicks-ass.net> <20190729205059.GA1127@roeck-us.net> <20190816193208.GA29478@roeck-us.net> <20210727100018.19d61165@md1za8fc.ad001.siemens.net> <745f219e-1593-4fbd-fa7f-1719ef6f444d@siemens.com> <8734mg92pt.ffs@tglx> <20250709134401.GA675435@lorien.usersys.redhat.com> <87frervq1o.ffs@tglx> Date: Sun, 20 Jul 2025 12:47:24 +0200 Message-ID: <87a54zuojn.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sat, Jul 19 2025 at 23:17, Thomas Gleixner wrote: > On Wed, Jul 09 2025 at 09:44, Phil Auld wrote: >> Hi Thomas, >> >> On Tue, Sep 03, 2024 at 05:27:58PM +0200 Thomas Gleixner wrote: >>> On Tue, Jul 27 2021 at 10:46, Jan Kiszka wrote: >>> >>> Picking up this dead thread again. >> >> Necro-ing this again... >> >> I keep getting occasional reports of this case. Unfortunately >> though, I've never been able to reproduce it myself. >> >> Did the below patch ever go anywhere? > > Nope. Guocai said it does not work and I have no reproducer either to > actually look at it deeper and there was further debug data provided. Obviously: no further debug data was provided, so I can only tap in the dark.