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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39D33C433FE for ; Tue, 26 Apr 2022 19:07:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354033AbiDZTKU (ORCPT ); Tue, 26 Apr 2022 15:10:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353914AbiDZTKT (ORCPT ); Tue, 26 Apr 2022 15:10:19 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE75533E8F; Tue, 26 Apr 2022 12:06:56 -0700 (PDT) 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=B1SlxgZnhDUv62Meok/Uu1ZlEfn1sYvml/husNq9EFk=; b=Rg9I6iE7iBm2gZ0pnunKbQuLph 3W2laBbrkE61WD0EcujIQ+3x+7XcZN4aoaGo1ULY5exrjuA48m375e6lP4e0i87fAE/mg2hPlNM2t zlMGyshYnDTWiKUQwOvtUOKmIXt1RrdiqbbLwv04wcWZOIBQVWksH4zIvBG2a9JtlzUlgwoiMS1oh 4KHtc6IMkwAH7sdlElErNI0FFYOhvvlRNa2jSTafq+fFXnMaQH+vy6D0tsjmgL2yMMKOpSegxVqAQ 7hbv+h2LKx4UZQy9zU9yg0C4Rjl4bK3l0WU57AhabP0aCt54SHvIPKWC6fDARGRHid0HzClMr218b 594TbfeA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1njQWQ-009vVJ-E3; Tue, 26 Apr 2022 19:06:50 +0000 Date: Tue, 26 Apr 2022 20:06:50 +0100 From: Matthew Wilcox To: Stefan Roesch Cc: io-uring@vger.kernel.org, kernel-team@fb.com, linux-mm@kvack.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, david@fromorbit.com Subject: Re: [RFC PATCH v1 02/18] mm: add FGP_ATOMIC flag to __filemap_get_folio() Message-ID: References: <20220426174335.4004987-1-shr@fb.com> <20220426174335.4004987-3-shr@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220426174335.4004987-3-shr@fb.com> Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Tue, Apr 26, 2022 at 10:43:19AM -0700, Stefan Roesch wrote: > Define FGP_ATOMIC flag and add support for the new flag in the function > __filemap_get_folio(). No. You don't get to use the emergency memory pools for doing writes. That completely screws up the MM.