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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 59AF3C2B9F4 for ; Tue, 15 Jun 2021 02:26:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 320D8610A0 for ; Tue, 15 Jun 2021 02:26:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229829AbhFOC2i (ORCPT ); Mon, 14 Jun 2021 22:28:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:44026 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229782AbhFOC2h (ORCPT ); Mon, 14 Jun 2021 22:28:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BA80C6100B; Tue, 15 Jun 2021 02:05:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1623722748; bh=ZFtyuTx8VLBSFTFBWid2ovfEPURebQPmXTtCIu3lq1Y=; h=Date:From:To:Subject:From; b=eug7IGURQ+BMQjci8V8eRyFxJ/9NAAjsGX0xe6RtJ+1m/zeoY9sdr1LuAVnXF7+bs rIZUSFKFX7wLa9JC10nM0k+NeE+DQA/RBonpknnGFHPhAZAXkAcTJO83XQ4IDx0t0h l17/iboJ6dIzW52duNm6P8b6kII1n7ZL5GmiDrzs= Date: Mon, 14 Jun 2021 19:05:47 -0700 From: akpm@linux-foundation.org To: aquini@redhat.com, hca@linux.ibm.com, kirill.shutemov@linux.intel.com, mm-commits@vger.kernel.org, vbabka@suse.cz, vdavydov.dev@gmail.com, willy@infradead.org, yuzhao@google.com Subject: + mm-mark-idle-page-tracking-as-broken.patch added to -mm tree Message-ID: <20210615020547.0bhMmTZsz%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: mark idle page tracking as BROKEN has been added to the -mm tree. Its filename is mm-mark-idle-page-tracking-as-broken.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/mm-mark-idle-page-tracking-as-broken.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/mm-mark-idle-page-tracking-as-broken.patch 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 and is updated there every 3-4 working days ------------------------------------------------------ From: "Matthew Wilcox (Oracle)" Subject: mm: mark idle page tracking as BROKEN In discussion with other MM developers around how idle page tracking should be fixed for transparent huge pages, several expressed the opinion that it should be removed as it is inefficient at accomplishing the job that it is supposed to, and we have better mechanisms (eg uffd) for accomplishing the same goals these days. Mark the feature as BROKEN for now and we can remove it entirely in a few months if nobody complains. It is not enabled by Android, ChromeOS, Debian, Fedora or SUSE. Red Hat enabled it with RHEL-8.1 and UEK followed suit, but I have been unable to find why RHEL enabled it. Link: https://lkml.kernel.org/r/20210612000714.775825-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Yu Zhao Acked-by: Kirill A. Shutemov SeongJae Park Cc: Heiko Carstens Cc: Rafael Aquini Cc: Vlastimil Babka Cc: Vladimir Davydov Signed-off-by: Andrew Morton --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/Kconfig~mm-mark-idle-page-tracking-as-broken +++ a/mm/Kconfig @@ -772,7 +772,7 @@ config DEFERRED_STRUCT_PAGE_INIT config IDLE_PAGE_TRACKING bool "Enable idle page tracking" - depends on SYSFS && MMU + depends on SYSFS && MMU && BROKEN select PAGE_EXTENSION if !64BIT help This feature allows to estimate the amount of user pages that have _ Patches currently in -mm which might be from willy@infradead.org are mm-mark-idle-page-tracking-as-broken.patch mm-make-__dump_page-static.patch mm-debug-factor-pagepoisoned-out-of-__dump_page.patch mm-page_owner-constify-dump_page_owner.patch mm-make-compound_head-const-preserving.patch mm-constify-get_pfnblock_flags_mask-and-get_pfnblock_migratetype.patch mm-constify-page_count-and-page_ref_count.patch mm-optimise-nth_page-for-contiguous-memmap.patch