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 59F0428640C for ; Tue, 26 May 2026 08:28:40 +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=1779784121; cv=none; b=p5qs7Bdn/G+qPQVF6P4izpG5y/b8zuYWQo0sBS+InzlDAQb/CDbLFnHFgaBteCJ+SIIy2pVG39MqztjCQzu+Ygi9A11V9QA/m5FcqFEvVpU3AmJk4tjvxQnfHKsILuWX2Tlr4IC+CHgY0dE3NG2oxz5zElqO5j04eHtcJFwDHWg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779784121; c=relaxed/simple; bh=OLZEus+tCL11fm5pjczjLroLeFvpHRb7wyyV18rDJdo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=q1eywGokhyIJMzD0WSCmObiWbLIpOTAAeu/nKOlhXVEHEV7xcbvaiBmtkVVV97JpP7qM7CWRpnxkXF6IZ474EZ+1armBiGiqI8aknyokJAQ7W24ZzcMRVu/SOaB3ZbmvzSOvB3pndfDqatrUFwaqL1c/tXfwPPp06pzfpnGuwqc= 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=YPvff5e1; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=A8xG6QD3; 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="YPvff5e1"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="A8xG6QD3" Date: Tue, 26 May 2026 10:28:36 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1779784118; 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=OLZEus+tCL11fm5pjczjLroLeFvpHRb7wyyV18rDJdo=; b=YPvff5e1CqWDNw0LdhWd/NJTJdY0t3d+BO+fF9C7go3km0AU9OU0oKEgMSRpEDqSGQqkrm bQagXu8iCrP5ZdU4Ol53J9hhDddmjY0niil5EJOM3kmsZpMBieptHfpRyzGMw7Xz+z08Lz 223fz+dRSYTKE7k9Qo7UNvkGMNP+qxz1ePFYd42kbXBdz8Ntw1aZ8xcBXnmbH923rvaMJ5 H4DRMBgvRQ3rF4ii0r9LJk7VnTAtBptZAqFtfUXo54g9EwkBbfgk1BiOkwq2eYxi3sAAcp PZ56Rxfzs/vyMeOQMK8BJDyfhN9ANrhvryyU0z0IRPJcoicCQEk3qkdAb5y94w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1779784118; 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=OLZEus+tCL11fm5pjczjLroLeFvpHRb7wyyV18rDJdo=; b=A8xG6QD3U0AlvPv5eFmggfqrUJ1hYC5luFTi2p5IDfdF0a88uKbba8DStU3iPZZPv21xDb uQMSgpIcCxrIGuBQ== From: Sebastian Andrzej Siewior To: Michal Hocko Cc: Waiman Long , Marc Zyngier , Thomas Gleixner , Clark Williams , Steven Rostedt , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 1/2] gfp_types: Introduce a new GFP_ATOMIC_RT gfp flag Message-ID: <20260526082836.9BOv1yCM@linutronix.de> References: <20260520204628.933654-1-longman@redhat.com> 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=utf-8 Content-Disposition: inline In-Reply-To: On 2026-05-25 10:41:58 [+0200], Michal Hocko wrote: > Before we go this way we need to really be clear we do want to support > raw_spinlock (aka RT) contexts. This is a big commitment because it > dictates internal allocator locking that would have potentially a much This is only needed for 2/2 of this series and Marc didn't want it. Sebastian