From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 40938CD5BAC for ; Fri, 22 May 2026 09:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=3c05gl0H/GpWSA6qaxgxfypMYcQADyQffOHZBAKPcvc=; b=NYTTJH2Ymmq13t6CnFzW6fGWBU zHh43Cxcc8F3+iqGCfnGdA+wVY5hFdG/AbTcpfLe9gAqrmma6+orCRH3HR8qgCSDp8GfROQgtkdXJ K5NZhxeU1CdBWp7cXlbiFxEo7PDbgFmpRw/c8NEwbgcIwm8KHgl6gFFGkpaIkSOlH6EchYwGEkgfG Ql1j8JcsVBy/lZ6EzrTFHZidcSzejtZapDIbUAmWmvLNg6mg5eU6PEETlohfhS0BoJSsd47Paj9Q4 UstW9lpXNMGsLU9j3n2zfdsLN0/BEvEYAXIPj8PcOCZndyE99kG/SCcWmc9Tn9Fqrjtu8rLXlekbt 5vH9AY3w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wQLqH-0000000AGxa-1Iiu; Fri, 22 May 2026 09:06:53 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wQLqG-0000000AGx4-23ST for linux-arm-kernel@lists.infradead.org; Fri, 22 May 2026 09:06:52 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id D6DBB60136; Fri, 22 May 2026 09:06:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 701E21F0155D; Fri, 22 May 2026 09:06:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779440809; bh=3c05gl0H/GpWSA6qaxgxfypMYcQADyQffOHZBAKPcvc=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=AHh9Mvku4Tnd8U5EQXKfG07xtqXD/gmOXK6xZTxiIvJAiMFkn1FNVmOhV3MWPz75/ IV9zCMOtUNQoilLVACbSZK+6EbGvqrV5e1yPfiLurnr2w835AOHAnwWn2FeYnpdyPC fhxUWLFapRiDSRH2XCyrWgKKh58W3k075AIgm7/R4TgvNhK5wwhclvtlNGngiQjS3a 8cPy7dmRejgOL+ZiWJjl6IzW4cEoNz5h+OsGrMMS+AA8hglPmkdWuQ+LPZzi5AbFJI epMFfBExLfqLf6f4l8USRqpiRmVtZyXHsW2kjK3jYOy5jDOEQO77z5X28B5fJPEHYd LKQBvrIrMTVsw== Date: Fri, 22 May 2026 10:06:42 +0100 From: Lorenzo Stoakes To: Marc Zyngier Cc: Waiman Long , Thomas Gleixner , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , Andrew Morton , David Hildenbrand , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 2/2] irqchip/gic-v3-its: Use GFP_ATOMIC_RT gfp flag in allocate_vpe_l1_table() Message-ID: References: <20260520204628.933654-1-longman@redhat.com> <20260520204628.933654-2-longman@redhat.com> <861pf3x3hc.wl-maz@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <861pf3x3hc.wl-maz@kernel.org> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, May 22, 2026 at 09:17:35AM +0100, Marc Zyngier wrote: > On Wed, 20 May 2026 21:46:28 +0100, > Waiman Long wrote: > > > > A longer term solution is to defer the allocation to a later stage of the > > hotplug pipeline where interrupt isn't disabled. > > And that's what needs doing. Not papering over this in a bizarre way. > I proposed a potential solution a few months back, but didn't get a > chance to work on it. If you have the bandwidth, that's the way to go. > > But papering over this issue this way seems like a bad case of short > term and unsustainable hack. Yes, agreed. It really smacks of trying the fix the problem at the wrong level of abstraction. > > Thanks, > > M. > > -- > Without deviation from the norm, progress is not possible. Cheers, Lorenzo