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 X-Spam-Level: X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75CD0C48BE8 for ; Wed, 16 Jun 2021 09:59:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F1B561057 for ; Wed, 16 Jun 2021 09:59:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231836AbhFPKBK (ORCPT ); Wed, 16 Jun 2021 06:01:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43878 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231491AbhFPKBH (ORCPT ); Wed, 16 Jun 2021 06:01:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623837541; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=tDra7duGdJtvXy9UbrpYtRJLG4m9nZjGKLs8yOICISM=; b=Ct8VJlDMkkqXzMC9AihM8y/Exyeiq5Dx5uREPfpihiBmU8g13pibAhqBvybFXhG0sdDuH+ SLgf0In7lSbbnUIuCMwsyjQakLNF1Syhw4xumg3KKbZQ69dZpzqUGTvYzjb9T8Rd5oj47/ CxqziwACYykhWm9wUxn7d86ER/OVz94= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-237-XOS2j8QTMXy9ge3zMxXNAw-1; Wed, 16 Jun 2021 05:59:00 -0400 X-MC-Unique: XOS2j8QTMXy9ge3zMxXNAw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C67131084F49; Wed, 16 Jun 2021 09:58:58 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-118-65.rdu2.redhat.com [10.10.118.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id E59295C1C5; Wed, 16 Jun 2021 09:58:56 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20210614201435.1379188-11-willy@infradead.org> References: <20210614201435.1379188-11-willy@infradead.org> <20210614201435.1379188-1-willy@infradead.org> To: "Matthew Wilcox (Oracle)" Cc: dhowells@redhat.com, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Jeff Layton , "Kirill A . Shutemov" , Vlastimil Babka , William Kucharski Subject: Re: [PATCH v11 10/33] mm: Add folio flag manipulation functions MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <813816.1623837536.1@warthog.procyon.org.uk> Date: Wed, 16 Jun 2021 10:58:56 +0100 Message-ID: <813817.1623837536@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Matthew Wilcox (Oracle) wrote: > These new functions are the folio analogues of the various PageFlags > functions. If CONFIG_DEBUG_VM_PGFLAGS is enabled, we check the folio > is not a tail page at every invocation. This will also catch the > PagePoisoned case as a poisoned page has every bit set, which would > include PageTail. > > This saves 1684 bytes of text with the distro-derived config that > I'm testing due to removing a double call to compound_head() in > PageSwapCache(). > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Christoph Hellwig > Acked-by: Jeff Layton > Acked-by: Kirill A. Shutemov > Acked-by: Vlastimil Babka > Reviewed-by: William Kucharski Reviewed-by: David Howells