From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 DE3D3223707 for ; Fri, 22 Aug 2025 17:44:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755884662; cv=none; b=pXkxzhlPGrabt59OQ6/X7lgnWwS6l4F3Stk1CU/5MEtTYG6bitkIiI4qJKmRzKOI/pEM9kVQPLroKwooirc/UtbNgGolYsdctg4EyKGgFyNQyaOJAC2W2vOZjjqdQ4wP4bz+ERcaMbhQIYvCZ55rDBpsC6ot6a9umCixjfbF9IU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755884662; c=relaxed/simple; bh=tzTExOjQ48Ssla6xpsmnhOcQtYk334/k0063efP0+Xc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TK228wNTmLCUzUK1kQbD0SGpV33tDS79IFSTDu2vDI2qJd7dwFoOfZfG6ptQRy7d2gHC3oX31C/mVLQi3I4JwPP4N9xoPk+1Pk0xsjpDqo8RAC+DgtYnpByNuIdc9V9QFFA1kg98YiJB0S/YMD2os6j6sUs7e3OhhuuqZSu7FpM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=vFZeOZTy; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="vFZeOZTy" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=oTJjicaLJIAJUskoLvi8hPpWtcjqd5f2viAMGrcaP2k=; b=vFZeOZTyAO289lSSB71sUt6gZB 0azEL/iAAphj41V/24KeFpAICY6Bom7PP6OnoHsBKpmPI198Ep+4SJ8R7vybYuetXCgU995YhU4AS SM/JfEis1gbqev05PEOPnxXjz7PYeNMQ5Moib4kIsM0eDUEHfcpPVs6r6ZssJXv5RZBBy2/kBBASO c3lHbFVFZWz2hACto4ESS5Z1PFvDsplNg9KrmOschrtQuzmB+Xs4XNwkNCKzTnJ6MCy9Sf23gzgk0 DvWG+IS/5Llh57rcxgfcjiCIz/OTUzxl7exOnK2s0sEXSQdRacX0WDacdty9A1kinQMHrkyOv+FcM Hm/ks5Dw==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1upVoE-0000000AnCH-0Ctc; Fri, 22 Aug 2025 17:44:14 +0000 Date: Fri, 22 Aug 2025 18:44:13 +0100 From: Matthew Wilcox To: Lokesh Gidra Cc: David Hildenbrand , Lorenzo Stoakes , Andrew Morton , Harry Yoo , Zi Yan , Barry Song <21cnbao@gmail.com>, "open list:MEMORY MANAGEMENT" , Peter Xu , Suren Baghdasaryan , Kalesh Singh , android-mm , linux-kernel , Jann Horn , Rik van Riel , Vlastimil Babka , "Liam R. Howlett" Subject: Re: [DISCUSSION] Unconditionally lock folios when calling rmap_walk() Message-ID: References: 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: On Fri, Aug 22, 2025 at 10:29:52AM -0700, Lokesh Gidra wrote: > Currently, some callers of rmap_walk() conditionally avoid try-locking > non-ksm anon folios. This necessitates serialization through anon_vma ... this seems awfully familiar. Why did you send it again after a bunch of people had already said useful things on that thread?