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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 AF261C43460 for ; Wed, 14 Apr 2021 04:59:53 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 55D3A613C4 for ; Wed, 14 Apr 2021 04:59:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 55D3A613C4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 8B3776B0070; Wed, 14 Apr 2021 00:59:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 84FC96B0071; Wed, 14 Apr 2021 00:59:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 765D66B0072; Wed, 14 Apr 2021 00:59:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0210.hostedemail.com [216.40.44.210]) by kanga.kvack.org (Postfix) with ESMTP id 59E7A6B0070 for ; Wed, 14 Apr 2021 00:59:52 -0400 (EDT) Received: from smtpin36.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 0F98682499B9 for ; Wed, 14 Apr 2021 04:59:52 +0000 (UTC) X-FDA: 78029770224.36.432E0A7 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf07.hostedemail.com (Postfix) with ESMTP id 3D38EA000390 for ; Wed, 14 Apr 2021 04:59:51 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 5B040ABB1; Wed, 14 Apr 2021 04:59:50 +0000 (UTC) Date: Wed, 14 Apr 2021 06:59:48 +0200 From: Oscar Salvador To: Mike Kravetz Cc: Andrew Morton , Vlastimil Babka , David Hildenbrand , Michal Hocko , Muchun Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v7 4/7] mm,hugetlb: Split prep_new_huge_page functionality Message-ID: References: <20210413104747.12177-1-osalvador@suse.de> <20210413104747.12177-5-osalvador@suse.de> <94992151-03fc-dedd-3e09-811908d26d04@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <94992151-03fc-dedd-3e09-811908d26d04@oracle.com> X-Rspamd-Queue-Id: 3D38EA000390 X-Stat-Signature: k7tzb761f7ad9i65tqzjekg5te7ujpxc X-Rspamd-Server: rspam02 Received-SPF: none (suse.de>: No applicable sender policy available) receiver=imf07; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: none/none X-HE-Tag: 1618376391-867636 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Apr 13, 2021 at 02:33:41PM -0700, Mike Kravetz wrote: > > -static void prep_new_huge_page(struct hstate *h, struct page *page, int nid) > > +/* > > + * Must be called with the hugetlb lock held > > + */ > > +static void __prep_account_new_huge_page(struct hstate *h, int nid) > > +{ > > + h->nr_huge_pages++; > > + h->nr_huge_pages_node[nid]++; > > I would prefer if we also move setting the destructor to this routine. > set_compound_page_dtor(page, HUGETLB_PAGE_DTOR); Uhm, but that is the routine that does the accounting, it feels wrong here, plus... > > That way, PageHuge() will be false until it 'really' is a huge page. > If not, we could potentially go into that retry loop in > dissolve_free_huge_page or alloc_and_dissolve_huge_page in patch 5. ...I do not follow here, could you please elaborate some more? Unless I am missing something, behaviour should not be any different with this patch. Thanks -- Oscar Salvador SUSE L3