From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B39C5383C60; Mon, 11 May 2026 19:33:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778528005; cv=none; b=GdQgtY+h26uBzMbcSpTPKIzRvAerqJgA3U/C/pDyy2Ih5oFsRVjaBtg/BSagPlSzXpGEbhGcAI5PVwrvheuD4uLdDpztE8LrSB5xr9QAcM7l/Jo6z6ljTZCTlI84hf+EIVC0QkibiXOGQRw+PUKdBZX3ZMKQL72JubRbt4lOxFs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778528005; c=relaxed/simple; bh=XNXqcEP8geK7IF7CA02cuvNnQnEvyFsTr2g79+OfuOY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Bm7d2xZ+MoXPn4kRpAWcd90JAA7Rj9Rx657jYWIRJNNRraN3vQ70x4Lzntz1XvmhoAGyxMzwv2AqnFelX8wnSoQZs9OdXFSom3E+QnQvdvhwsK6umHxlFAuKAwncv/iap/gswFdoFREifefuSo4kyggL2MVIIw2/z0vuBh4mosM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FIfstDXi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FIfstDXi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CC10C2BCB0; Mon, 11 May 2026 19:33:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778528005; bh=XNXqcEP8geK7IF7CA02cuvNnQnEvyFsTr2g79+OfuOY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FIfstDXiJUevKsaF+OfUBsXc8fj+zlT1rsvdvFWU15hMS1WHF5YCK6Z89N6DoQNPa QzJj1hVyaHSBUYJp/p01K6Oqw6OC9rlQlN4/6AkjA0+fuPE653PQBu/eLnbHp6Qqy/ TAk7wdNXc6j7BbHB4//LEf1JLRbn2X/GlovosEUqMdCm1ZRDvrwMwoaQb+wEcnipNi U0E+2CvlaJKzPoG7JqlvGzJXRbLPcJ0Ia2k2u0DU/Hu8oJCA3JXFqDHfkrosc5LSHE jzboE/zFeH0lmEId0/RMpzwgCmgXlIRLucd3VRrdX1myUn6rLu+ekBwwhO7Q9S/LUF 6s/SWdYoeb7bg== Date: Mon, 11 May 2026 09:33:24 -1000 From: Tejun Heo To: Peter Zijlstra Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Steven Rostedt , Dietmar Eggemann , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Kyle McMartin , linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH sched/core] sched/rt: Fix RT_PUSH_IPI soft lockup loop Message-ID: References: <20260506235716.2530720-1-tj@kernel.org> <20260507141437.GJ3102624@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260507141437.GJ3102624@noisy.programming.kicks-ass.net> On Thu, May 07, 2026 at 04:14:37PM +0200, Peter Zijlstra wrote: > IIRC Steve has a test for this stuff. If this breaks things, an > alternative is keeping a counter/limit on attempts or something. Ping. For some reason, we're seeing this reliably now. Whichever way is fine but it'd be nice to roll out something that's landing upstream. Thanks. -- tejun