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 9F4AAC433FE for ; Fri, 30 Sep 2022 23:54:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231299AbiI3Xym (ORCPT ); Fri, 30 Sep 2022 19:54:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230291AbiI3Xym (ORCPT ); Fri, 30 Sep 2022 19:54:42 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B39DF2A949 for ; Fri, 30 Sep 2022 16:54:39 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 71797B815A5 for ; Fri, 30 Sep 2022 23:54:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24005C433D6; Fri, 30 Sep 2022 23:54:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1664582077; bh=rpKgK0EkhQunJHIRa26q/lOCbRKn6gc75lJc9UkICgk=; h=Date:To:From:Subject:From; b=vKgvtyrTAkIqEgCuXvLeV5cfv4RrEOoltCPqtShzi39r82ox5RsaJ5vNifgoEPjc9 lNZe8v7KAt+bSAHuEZgiHIGfxrRfb+yH/39HPytHCJM9tWBgyoxZPbk54hdoXBUbLo yNCHUAIgzZAPnmZUoZmFt7+hP7hukqFUOnhrJRj4= Date: Fri, 30 Sep 2022 16:54:36 -0700 To: mm-commits@vger.kernel.org, axelrasmussen@google.com, yuzhao@google.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-mglru-dont-sync-disk-for-each-aging-cycle.patch added to mm-unstable branch Message-Id: <20220930235437.24005C433D6@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: mm/mglru: don't sync disk for each aging cycle has been added to the -mm mm-unstable branch. Its filename is mm-mglru-dont-sync-disk-for-each-aging-cycle.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mglru-dont-sync-disk-for-each-aging-cycle.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: Yu Zhao Subject: mm/mglru: don't sync disk for each aging cycle Date: Wed, 28 Sep 2022 13:36:58 -0600 wakeup_flusher_threads() was added under the assumption that if a system runs out of clean cold pages, it might want to write back dirty pages more aggressively so that they can become clean and be dropped. However, doing so can breach the rate limit a system wants to impose on writeback, resulting in early SSD wearout. Link: https://lkml.kernel.org/r/YzSiWq9UEER5LKup@google.com Fixes: bd74fdaea146 ("mm: multi-gen LRU: support page table walks") Signed-off-by: Yu Zhao Reported-by: Axel Rasmussen Signed-off-by: Andrew Morton --- mm/vmscan.c | 2 -- 1 file changed, 2 deletions(-) --- a/mm/vmscan.c~mm-mglru-dont-sync-disk-for-each-aging-cycle +++ a/mm/vmscan.c @@ -4413,8 +4413,6 @@ done: if (wq_has_sleeper(&lruvec->mm_state.wait)) wake_up_all(&lruvec->mm_state.wait); - wakeup_flusher_threads(WB_REASON_VMSCAN); - return true; } _ Patches currently in -mm which might be from yuzhao@google.com are mm-mglru-dont-sync-disk-for-each-aging-cycle.patch