From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 D85AC597F5A; Mon, 19 Oct 2026 14:39:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792420775; cv=none; b=B3+a4dn0KGVzuFveRln/w0EDkhAiscRoPeFPsb13IxBPR7RPUlIJec0rtQmcw/eAL8P8FLyyubIRpYTM7diiiNMHvKaNgR2MafAQSOCbDUauu5mGp9mhzM+QqcuoJ2IOvPSVlfiA6SjUzSeKNvazxBqpXpwS8NYkMu1g0V+EaVw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792420775; c=relaxed/simple; bh=JjM6WMwkRUf2/5gey+sJpRtb5OdpT/PMnafxddPOu+4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=kw16+kT9J0x536//AAI68VsGfhvyQ7LTZVEqhxNJv+UtbO2FtZ05Oyf0wXwcpnr0wH/VhH/IEY5hNbKu81lGVQ2YNX2ds8n1iW4fBU1J7tGvZT7V3rhMxY+6w0Z1CEsOU6PQ0c37H+d6eGC7esncqHjxdEGEcZpZi9i9uapneTs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SqP2OoJA; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SqP2OoJA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D093D1F000C9; Mon, 19 Oct 2026 14:39:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792420773; bh=6hWQwOt6Wt6hUvhPaeEqwpzhXz566q+fi9LFZingnXA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=SqP2OoJAFz60lu3Rxyx877dqP4vCGu83HkFx6suWTPAyerC//e6zk6twRwt21ZMx7 zgixhHQs1hfKO682iB+0Pltr1tbYACHSji4rD7I/XelqVCa5LcqGFUNT+Mn48Szaaz fglHf9x8Ut/vDzhqy662N9OYXACbtTLlpy5lXZfoNinvN9jSAdEJG9CaO2wycP7yaT Pj9of5A8NTLxrc5jFBXihvJ7U69ApwvgERUW67lxByxCk4zz5u90YU9sbq9ciVUJY+ KQZkWIDeRf97J0ulxABT2LeDJ64On/Jljx41whei3vhE8FXRgzde9EyltPEdDkAs/I WBz2K4WlSGEWA== Date: Mon, 19 Oct 2026 15:39:27 +0100 From: "Lorenzo Stoakes (ARM)" To: Andrew Morton Cc: Pedro Falcato , Suren Baghdasaryan , "Liam R. Howlett" , Vlastimil Babka , Shakeel Butt , David Hildenbrand , Mike Rapoport , Michal Hocko , Jonathan Corbet , Randy Dunlap , Jann Horn , linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, "Jose A. Perez de Azpillaga" , Daehyeon Ko <4ncienth@gmail.com> Subject: Re: [PATCH v2] mm/vma: avoid spurious write locks when mm->mm_lock_seq overflows Message-ID: References: <20261016-fix-vma-lock-overflow-v2-1-9eb778b79b58@kernel.org> <20261019073201.aee381fbbdf2edfdd0a68754@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-doc@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: <20261019073201.aee381fbbdf2edfdd0a68754@linux-foundation.org> On Mon, Oct 19, 2026 at 07:32:01AM -0700, Andrew Morton wrote: > On Mon, 19 Oct 2026 13:19:45 +0100 "Lorenzo Stoakes (ARM)" wrote: > > > On Mon, Oct 19, 2026 at 10:53:27AM +0100, Pedro Falcato wrote: > > > On Fri, Oct 16, 2026 at 12:34:33PM +0100, Lorenzo Stoakes (ARM) wrote: > > > > > > So I think it's fine to just send it (early :) in the merge window. > > > > --- > > > > v2: > > > > * Updated comment in vma_seqcount_is_write_locked() to mention the VMA > > > > being attached. > > > > * Renamed reset_vma_seqcounts() to __mm_reset_vma_seqcounts(). > > > > * Used acquire semantics in vma_start_reads() to avoid race with reset - > > > > there is another acquire immediately after this one so it should just be > > > > noise perf-wise. > > > > * Removed stable tag, will do the backports manually (just make the value > > > > 64 bits...) > > > > > > I guess you're fitting this where __vm_anon_pgoff_lo now sits? If so, then > > > this patch probably wants backporting to 7.3. > > > > Ack. > > I added cc:stable to the mm.git copy of this. But that'll trigger the bots for every revision right? I don't want that, even if they fail, that'll set off Sasha's bot who might get things spectacularly wrong. Could you update it to: Cc: # v7.3.x To be super clear about it. Thanks! -- Cheers, Lorenzo