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 50C8BC001DB for ; Tue, 8 Aug 2023 21:00:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234072AbjHHVAV (ORCPT ); Tue, 8 Aug 2023 17:00:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234079AbjHHVAA (ORCPT ); Tue, 8 Aug 2023 17:00:00 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62F5091B16 for ; Tue, 8 Aug 2023 11:23:15 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id ED473629ED for ; Tue, 8 Aug 2023 18:23:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 478D3C433C8; Tue, 8 Aug 2023 18:23:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1691518994; bh=qt/kcNw4aVfmquXguqDIFkNnjFSqn38ahZ1aKBwPMEo=; h=Date:To:From:Subject:From; b=hdIfUqTlaM+dashjVX6lCStVM9zh0+269y6TZUPOaqafXuSb99z+ckAiEyeWcF2od 4BHWIxT3H4ZXFAVuLq9uwZ3XVEQuxHCTCdVDAl/6Ujnfth//B11Aq9IIob5uZPBEq/ dGm+LU3ZHC2tYgeDD81c9k995N1Wy6dMiuy1fZS0= Date: Tue, 08 Aug 2023 11:23:13 -0700 To: mm-commits@vger.kernel.org, alexjlzheng@tencent.com, akpm@linux-foundation.org From: Andrew Morton Subject: + writeback-remove-redundant-checks-for-root-memcg.patch added to mm-unstable branch Message-Id: <20230808182314.478D3C433C8@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: writeback: remove redundant checks for root memcg has been added to the -mm mm-unstable branch. Its filename is writeback-remove-redundant-checks-for-root-memcg.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/writeback-remove-redundant-checks-for-root-memcg.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Jinliang Zheng Subject: writeback: remove redundant checks for root memcg Date: Tue, 8 Aug 2023 16:44:32 +0800 The check for root memcg will be done in wb_get_lookup(), so remove the redundant one to simplify the code. Link: https://lkml.kernel.org/r/20230808084431.1632934-1-alexjlzheng@tencent.com Signed-off-by: Jinliang Zheng Signed-off-by: Andrew Morton --- mm/backing-dev.c | 3 --- 1 file changed, 3 deletions(-) --- a/mm/backing-dev.c~writeback-remove-redundant-checks-for-root-memcg +++ a/mm/backing-dev.c @@ -732,9 +732,6 @@ struct bdi_writeback *wb_get_create(stru might_alloc(gfp); - if (!memcg_css->parent) - return &bdi->wb; - do { wb = wb_get_lookup(bdi, memcg_css); } while (!wb && !cgwb_create(bdi, memcg_css, gfp)); _ Patches currently in -mm which might be from alexjlzheng@tencent.com are writeback-remove-redundant-checks-for-root-memcg.patch