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 E3EA6C04AA9 for ; Wed, 20 Sep 2023 16:07:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234946AbjITQHY (ORCPT ); Wed, 20 Sep 2023 12:07:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54640 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234696AbjITQHY (ORCPT ); Wed, 20 Sep 2023 12:07:24 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42CB1D3 for ; Wed, 20 Sep 2023 09:07:18 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCDE8C433CD; Wed, 20 Sep 2023 16:07:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1695226037; bh=E+4vgkh9U/1OH2mEtMrnfyQ5dEHhDRIMbv4IXXLdwv8=; h=Date:To:From:Subject:From; b=B6upFWKOJU6FL3IW09xsuqpMMF42AyWZBsAq5EQONaZTQ73JmhW++/lrXlH7Lzz1/ +i4AOjdM1jZa34NpTNOZjRwo8+/9dKz1oAOjM7o/Z1CsvPcnSwqfyrIgExuYlB/XW0 WVJJ4FoPsKIcFH+mCMJVhWEYsIO5FM4KWHb0dUWU= Date: Wed, 20 Sep 2023 09:07:17 -0700 To: mm-commits@vger.kernel.org, wangyun@bilibili.com, bsingharora@gmail.com, wenyuli@ex.bilibili.com, akpm@linux-foundation.org From: Andrew Morton Subject: + delayacct-add-memory-reclaim-delay-in-get_page_from_freelist.patch added to mm-unstable branch Message-Id: <20230920160717.CCDE8C433CD@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: delayacct: add memory reclaim delay in get_page_from_freelist has been added to the -mm mm-unstable branch. Its filename is delayacct-add-memory-reclaim-delay-in-get_page_from_freelist.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/delayacct-add-memory-reclaim-delay-in-get_page_from_freelist.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: liwenyu Subject: delayacct: add memory reclaim delay in get_page_from_freelist Date: Wed, 20 Sep 2023 17:38:49 +0800 The current memory reclaim delay statistics only count the direct memory reclaim of the task in do_try_to_free_pages(). In systems with NUMA open, some tasks occasionally experience slower response times, but the total count of reclaim does not increase, using ftrace can show that node_reclaim has occurred. The memory reclaim occurring in get_page_from_freelist() is also due to heavy memory load. To get the impact of tasks in memory reclaim, this patch adds the statistics of the memory reclaim delay statistics for __node_reclaim(). Link: https://lkml.kernel.org/r/181C946095F0252B+7cc60eca-1abf-4502-aad3-ffd8ef89d910@ex.bilibili.com Signed-off-by: Wen Yu Li Cc: Balbir Singh Cc: Signed-off-by: Andrew Morton --- mm/vmscan.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/vmscan.c~delayacct-add-memory-reclaim-delay-in-get_page_from_freelist +++ a/mm/vmscan.c @@ -7350,6 +7350,7 @@ static int __node_reclaim(struct pglist_ cond_resched(); psi_memstall_enter(&pflags); + delayacct_freepages_start(); fs_reclaim_acquire(sc.gfp_mask); /* * We need to be able to allocate from the reserves for RECLAIM_UNMAP @@ -7372,6 +7373,7 @@ static int __node_reclaim(struct pglist_ memalloc_noreclaim_restore(noreclaim_flag); fs_reclaim_release(sc.gfp_mask); psi_memstall_leave(&pflags); + delayacct_freepages_end(); trace_mm_vmscan_node_reclaim_end(sc.nr_reclaimed); _ Patches currently in -mm which might be from wenyuli@ex.bilibili.com are delayacct-add-memory-reclaim-delay-in-get_page_from_freelist.patch