From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3AEA7184E; Sat, 11 Jan 2025 00:25:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736555101; cv=none; b=qMOroiTZCZsfSAWOkmLX7mOJduit6GS2lR02dG3kGGNTZcjpWSOSBRVS7+uvqIGzZsfeXVSfQt4xNAj76i/1WnG5KDkiv7EfIRqZ2HyUadR1Uq/ez/swel05U5CPG4d2iPdAq8R1U5Cdhq4VhFW6h7BXrgsIPd/7tGp5ScC70XE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736555101; c=relaxed/simple; bh=0J4+ZIurLjKBNvL57IUNrOJ6tDSnoI7G0yCSannrP2M=; h=Date:To:From:Subject:Message-Id; b=mCgOddApwwmluaqHijUgDoSt5T2rqIB3qPokcz4eQq3UnEimO8+55Kxp+GGbQuiQAearQC4RAEr8z6mdwK3Cj9x6BW87HehYGMDCWgquOBZ/RhohuYSLr+Iwd3wf1iz+oxeDGtqCml8nz4CiDcat75/Wz6tC/ijjfJj+fJxmQoo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=aRMzx8ad; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="aRMzx8ad" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9DF30C4CED6; Sat, 11 Jan 2025 00:25:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1736555100; bh=0J4+ZIurLjKBNvL57IUNrOJ6tDSnoI7G0yCSannrP2M=; h=Date:To:From:Subject:From; b=aRMzx8adzuMg8fdX8r0I9jno4YyqYwAivUHE67PTJKkWeiJaiakMvowMZ1tyRpG5k yw1+u7dFiZyychULa/Ddykgw2MdnxxKbqKI6ig1RzJ94jii4T/58THdD90721m9IWj wKAFc0aSRkBeYSoxdiV9IJV5QQtbpUPAx/dDd534= Date: Fri, 10 Jan 2025 16:25:00 -0800 To: mm-commits@vger.kernel.org,stable@vger.kernel.org,kaiyang2@cs.cmu.edu,lizhijian@fujitsu.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-vmscan-accumulate-nr_demoted-for-accurate-demotion-statistics.patch added to mm-hotfixes-unstable branch Message-Id: <20250111002500.9DF30C4CED6@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/vmscan: accumulate nr_demoted for accurate demotion statistics has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-vmscan-accumulate-nr_demoted-for-accurate-demotion-statistics.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmscan-accumulate-nr_demoted-for-accurate-demotion-statistics.patch This patch will later appear in the mm-hotfixes-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: Li Zhijian Subject: mm/vmscan: accumulate nr_demoted for accurate demotion statistics Date: Fri, 10 Jan 2025 20:21:32 +0800 In shrink_folio_list(), demote_folio_list() can be called multiple times, which can lead to inaccurate demotion statistics if the number of demoted pages is not accumulated correctly. Accumulate the nr_demoted count across multiple calls to demote_folio_list(), ensuring accurate reporting of demotion statistics. Link: https://lkml.kernel.org/r/20250110122133.423481-1-lizhijian@fujitsu.com Fixes: f77f0c751478 ("mm,memcg: provide per-cgroup counters for NUMA balancing operations") Signed-off-by: Li Zhijian Acked-by: Kaiyang Zhao Cc: Signed-off-by: Andrew Morton --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/vmscan.c~mm-vmscan-accumulate-nr_demoted-for-accurate-demotion-statistics +++ a/mm/vmscan.c @@ -1522,7 +1522,7 @@ keep: /* 'folio_list' is always empty here */ /* Migrate folios selected for demotion */ - stat->nr_demoted = demote_folio_list(&demote_folios, pgdat); + stat->nr_demoted += demote_folio_list(&demote_folios, pgdat); nr_reclaimed += stat->nr_demoted; /* Folios that could not be demoted are still in @demote_folios */ if (!list_empty(&demote_folios)) { _ Patches currently in -mm which might be from lizhijian@fujitsu.com are mm-vmscan-accumulate-nr_demoted-for-accurate-demotion-statistics.patch selftests-mm-add-a-few-missing-gitignore-files.patch