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 2720C394464; Fri, 22 May 2026 13:09:43 +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=1779455384; cv=none; b=RKZc7rgWje19J7CRnQDm7ofiIiu2POj3CMmWK8/tX9BEmbW93hNo203MHo7cOceQpgwLIhopv1uMazKt+40b08X6s2M1CQVI3vRE9Ykol3tHe5mFCRhWvYImyZxbupsR6qCliRhzoJSiU9VhHIiAR3EJ2a6+F1MWEfMWtrEa1WE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779455384; c=relaxed/simple; bh=EQj1Rbpw/H3Oe/sDGMgX6onZ6xyYKXcG7QBzM5CpJi0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cknFlQCXbtWgV06Vf25CzTaBWK82U5l8Jq5xupEU/hypJ31Qpgg6t9cQEGASFxuv7t2hJTjnHmaSBlIZFsxlnsJD+O2/yh1Ue84cXzf4+SSqz8rWpGSfMKCBVaXm/pgACXSB9tQoRT8depW521R44SjuLGdPqOchaL7kBgQUqoY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=pyFlsOsI; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="pyFlsOsI" 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=EQj1Rbpw/H3Oe/sDGMgX6onZ6xyYKXcG7QBzM5CpJi0=; b=pyFlsOsI1W2H+d/c1dR87cu4A1 nbk3QdhQ5igmGpectY46XehGUF3atPk8mqBTiAMYhp+RVUaHnf7U7vngJ2F4UAUNwxrJuFWL2uqdB d/WzjoEOMMz3D7k6H05YXwgJRsOWxWdJDddNXfpSrUVVgHRj5tJE6frgLHjiVX5xx+Bd6y6rK5bDz BjnT1OR4KHVpKXlgod+qjgxUoNjEidgt2I4IkCQEqjwx8IU2B9gxtaWWSot0M7QRZv1MxzvStf58r evpBrKrXC124rfJ3AuHL6Tt3FC+WRpKb7tjf8+PbXNt3tbgW/GZM31sgXDj/od4TakCYHwR3VUGW7 FSgIl7pw==; Received: from willy by casper.infradead.org with local (Exim 4.99.1 #2 (Red Hat Linux)) id 1wQPd1-0000000A7eI-1OCp; Fri, 22 May 2026 13:09:27 +0000 Date: Fri, 22 May 2026 14:09:27 +0100 From: Matthew Wilcox To: "Barry Song (Xiaomi)" Cc: akpm@linux-foundation.org, bhe@redhat.com, chentao@kylinos.cn, chrisl@kernel.org, david@kernel.org, jack@suse.cz, kasong@tencent.com, kunwu.chan@gmail.com, liam@infradead.org, lianux.mm@gmail.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, liyangouwen1@oppo.com, ljs@kernel.org, loongarch@lists.linux.dev, mhocko@suse.com, nphamcs@gmail.com, nzzhao@126.com, pfalcato@suse.de, rppt@kernel.org, shikemeng@huaweicloud.com, surenb@google.com, vbabka@kernel.org, wanglian@kylinos.cn, youngjun.park@lge.com Subject: Re: [PATCH v2 0/5] mm: reduce mmap_lock contention and improve page fault performance Message-ID: References: <20260522023305.98223-1-baohua@kernel.org> 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: <20260522023305.98223-1-baohua@kernel.org> On Fri, May 22, 2026 at 10:33:05AM +0800, Barry Song (Xiaomi) wrote: > need to touch `filemap.c` at all (probably because you are already > maintaining `filemap.c` perfectly): I'm going to give you one chance to apologise for that.