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 C6CE9168DA; Tue, 14 Jan 2025 04:09:10 +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=1736827750; cv=none; b=WXPS2dImTAbctAOf/N6VMrUQKVZ62OviMaI9QeFJkhYLxvsrdO6tV+HGtusipMTJQiQo3iyqb4B6Yr+90IRhWCVlAbfnZCmZgImq7XcM87IfgK4+e0wo6e1HP50DqRdx+qTlLnSzC/RNN/5Tb3Bh/2lK0Q5Lt1JF1RHPYp+al8c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736827750; c=relaxed/simple; bh=k8BVBYg2pk+wfA0RFCFTXXR4rPws/DbIwVFuoNOymkY=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=Shme3idhCjaJF5txIK6EqbhG0Tt7epGkg6pZof2ZYU/hjNj+pmodocQnpmzTSvKRsBskN7U4yLQjcQtLm4nKpVzMVQRzNE3FcXerBmBAmfC3C7toAxy9+U+r3fJnidOhatWCwsmC/yDzSeSeA5t+zFpB8Q3q8atZhlziQoRwMYM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=i8W5LaDV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="i8W5LaDV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FE6CC4CEDF; Tue, 14 Jan 2025 04:09:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1736827750; bh=k8BVBYg2pk+wfA0RFCFTXXR4rPws/DbIwVFuoNOymkY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=i8W5LaDVMdMeRKjuKIAp+oe+0aLo9cXzqnuGJ7Up5hGRVTQeTLxjAkNXp1M2uS1VX 84b12xeTyOofei9sMCqGEZU4OhRbo9fmchzbiqh3vGx6cxKUC0Lno+MCCZySBwh7XO FQzK+dBEPxlogpQauZpOHxHP/JTGROSvcME9Z+4Y= Date: Mon, 13 Jan 2025 20:09:08 -0800 From: Andrew Morton To: Suren Baghdasaryan Cc: Lorenzo Stoakes , peterz@infradead.org, willy@infradead.org, liam.howlett@oracle.com, david.laight.linux@gmail.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mjguzik@gmail.com, oliver.sang@intel.com, mgorman@techsingularity.net, david@redhat.com, peterx@redhat.com, oleg@redhat.com, dave@stgolabs.net, paulmck@kernel.org, brauner@kernel.org, dhowells@redhat.com, hdanton@sina.com, hughd@google.com, lokeshgidra@google.com, minchan@google.com, jannh@google.com, shakeel.butt@linux.dev, souravpanda@google.com, pasha.tatashin@soleen.com, klarasmodin@gmail.com, richard.weiyang@gmail.com, corbet@lwn.net, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@android.com Subject: Re: [PATCH v9 00/17] reimplement per-vma lock as a refcount Message-Id: <20250113200908.d821636a39e9ca6130a90e24@linux-foundation.org> In-Reply-To: References: <20250111042604.3230628-1-surenb@google.com> <20250113174941.8c6d5defe18c8b1a7e477ace@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) 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=UTF-8 Content-Transfer-Encoding: 8bit On Mon, 13 Jan 2025 18:53:11 -0800 Suren Baghdasaryan wrote: > On Mon, Jan 13, 2025 at 5:49 PM Andrew Morton wrote: > > > > > > Yes, we're at -rc7 and this series is rather in panic mode and it seems > > unnecessarily risky so I'm inclined to set it aside for this cycle. > > > > If the series is considered super desirable and if people are confident > > that we can address any remaining glitches during two months of -rc > > then sure, we could push the envelope a bit. But I don't believe this > > is the case so I'm thinking let's give ourselves another cycle to get > > this all sorted out? > > I didn't think this series was in panic mode with one real issue that > is not hard to address (memory ordering in > __refcount_inc_not_zero_limited()) but I'm obviously biased and might > be missing the big picture. In any case, if it makes people nervous I > have no objections to your plan. Well, I'm soliciting opinions here. What do others think? And do you see much urgency with these changes?