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=-10.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 C22B8C433E0 for ; Wed, 10 Feb 2021 18:36:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9032F64E0D for ; Wed, 10 Feb 2021 18:36:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234264AbhBJSgF (ORCPT ); Wed, 10 Feb 2021 13:36:05 -0500 Received: from mx2.suse.de ([195.135.220.15]:56254 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233250AbhBJSY0 (ORCPT ); Wed, 10 Feb 2021 13:24:26 -0500 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 3A054AF9C; Wed, 10 Feb 2021 18:23:44 +0000 (UTC) Subject: Re: [v7 PATCH 07/12] mm: vmscan: use a new flag to indicate shrinker is registered To: Yang Shi , guro@fb.com, ktkhai@virtuozzo.com, shakeelb@google.com, david@fromorbit.com, hannes@cmpxchg.org, mhocko@suse.com, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210209174646.1310591-1-shy828301@gmail.com> <20210209174646.1310591-8-shy828301@gmail.com> From: Vlastimil Babka Message-ID: <71968d18-0f5c-9379-104f-92a398f3e1ba@suse.cz> Date: Wed, 10 Feb 2021 19:23:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210209174646.1310591-8-shy828301@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/9/21 6:46 PM, Yang Shi wrote: > Currently registered shrinker is indicated by non-NULL shrinker->nr_deferred. > This approach is fine with nr_deferred at the shrinker level, but the following > patches will move MEMCG_AWARE shrinkers' nr_deferred to memcg level, so their > shrinker->nr_deferred would always be NULL. This would prevent the shrinkers > from unregistering correctly. > > Remove SHRINKER_REGISTERING since we could check if shrinker is registered > successfully by the new flag. > > Acked-by: Kirill Tkhai > Signed-off-by: Yang Shi Acked-by: Vlastimil Babka With Roman's suggestion it's fine by me too.