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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 1B427C433DB for ; Tue, 9 Mar 2021 17:55:10 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A895E6522E for ; Tue, 9 Mar 2021 17:55:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A895E6522E Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E166B8D0126; Tue, 9 Mar 2021 12:55:08 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DEC778D007F; Tue, 9 Mar 2021 12:55:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CB5278D0126; Tue, 9 Mar 2021 12:55:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0094.hostedemail.com [216.40.44.94]) by kanga.kvack.org (Postfix) with ESMTP id B157C8D007F for ; Tue, 9 Mar 2021 12:55:08 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 74475824999B for ; Tue, 9 Mar 2021 17:55:08 +0000 (UTC) X-FDA: 77901087096.16.08026A8 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf11.hostedemail.com (Postfix) with ESMTP id 35C482015DDA for ; Tue, 9 Mar 2021 17:54:56 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1615312493; h=from:from:reply-to: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=U/QDGXem12Pxb7eLy5qL+FVC4i3Gwof8hgAbnQWzXZQ=; b=nJktd1E7kuiWKgLuQn2T5fbjub8/ihZ6F/p8Mpfiybg3fLsbOne/B+4tVBh3QTSanWO0DA 4iVmn8VLUrAFMgRd6lUhml9bpgAsAgGdbRM72/te9R4gcIvJUFn2lSGAE7nR5YHzytHsoY bR4OjzBpc8LpBLW2QuxjMer+5PfTxQE= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E9813ACC6; Tue, 9 Mar 2021 17:54:52 +0000 (UTC) Date: Tue, 9 Mar 2021 18:54:52 +0100 From: Michal Hocko To: Minchan Kim Cc: Andrew Morton , linux-mm , LKML , joaodias@google.com, surenb@google.com, cgoldswo@codeaurora.org, willy@infradead.org, david@redhat.com, vbabka@suse.cz, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v2 1/2] mm: disable LRU pagevec during the migration temporarily Message-ID: References: <20210309051628.3105973-1-minchan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: hun3a8cytt38co4xm664knpsfufwifpp X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 35C482015DDA Received-SPF: none (suse.com>: No applicable sender policy available) receiver=imf11; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615312496-330415 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 09-03-21 08:29:21, Minchan Kim wrote: > On Tue, Mar 09, 2021 at 12:03:08PM +0100, Michal Hocko wrote: [...] > > Sorry for nit picking but I think the additional abstraction for > > migrate_prep is not really needed and we can remove some more code. > > Maybe we should even get rid of migrate_prep_local which only has a > > single caller and open coding lru draining with a comment would be > > better from code reading POV IMO. > > Thanks for the code. I agree with you. > However, in this moment, let's go with this one until we conclude. > The removal of migrate_prep could be easily done after that. > I am happy to work on it. I will leave that up to you but I find it a bit pointless to add migrate_finish just to remove it in the next patch. Btw. you should also move lru_cache_disabled up in swap.c to fix up compilation issues by 0 day bot. I didn't do that in my version. -- Michal Hocko SUSE Labs