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 B5FBEC433B4 for ; Thu, 22 Apr 2021 04:17:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 65BBA6144A for ; Thu, 22 Apr 2021 04:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229557AbhDVESO (ORCPT ); Thu, 22 Apr 2021 00:18:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:48972 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229468AbhDVESO (ORCPT ); Thu, 22 Apr 2021 00:18:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EFD3461450; Thu, 22 Apr 2021 04:17:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1619065060; bh=A/ehHG/dYRzBHm4PhQrl1xK8ONkmtXL9Z8h0ItRmM60=; h=Date:From:To:Subject:From; b=mA5DCD3X2NSkmjRyVv5WOT9SW1GPW+9PCKgS1i5+mQYvKvKaP18cMGP+7JmXMqwxK h4pP3G+Os4uF4KPELpOocJh7dpZvHVc8PvP9xgK428aJeKDazNNYF3GHmz2PbBs+cH +yl7VduznLoM4yLmVCNqUGKumYJJbcbutbAX7ePk= Date: Wed, 21 Apr 2021 21:17:39 -0700 From: akpm@linux-foundation.org To: dvyukov@google.com, elver@google.com, glider@google.com, hdanton@sina.com, jannh@google.com, mark.rutland@arm.com, mm-commits@vger.kernel.org Subject: + kfence-use-power-efficient-work-queue-to-run-delayed-work.patch added to -mm tree Message-ID: <20210422041739.UwxlbOCFB%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: kfence: use power-efficient work queue to run delayed work has been added to the -mm tree. Its filename is kfence-use-power-efficient-work-queue-to-run-delayed-work.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/kfence-use-power-efficient-work-queue-to-run-delayed-work.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/kfence-use-power-efficient-work-queue-to-run-delayed-work.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: Marco Elver Subject: kfence: use power-efficient work queue to run delayed work Use the power-efficient work queue, to avoid the pathological case where we keep pinning ourselves on the same possibly idle CPU on systems that want to be power-efficient (https://lwn.net/Articles/731052/). Link: https://lkml.kernel.org/r/20210421105132.3965998-4-elver@google.com Signed-off-by: Marco Elver Cc: Alexander Potapenko Cc: Dmitry Vyukov Cc: Hillf Danton Cc: Jann Horn Cc: Mark Rutland Signed-off-by: Andrew Morton --- mm/kfence/core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/mm/kfence/core.c~kfence-use-power-efficient-work-queue-to-run-delayed-work +++ a/mm/kfence/core.c @@ -636,7 +636,8 @@ static void toggle_allocation_gate(struc /* Disable static key and reset timer. */ static_branch_disable(&kfence_allocation_key); #endif - schedule_delayed_work(&kfence_timer, msecs_to_jiffies(kfence_sample_interval)); + queue_delayed_work(system_power_efficient_wq, &kfence_timer, + msecs_to_jiffies(kfence_sample_interval)); } static DECLARE_DELAYED_WORK(kfence_timer, toggle_allocation_gate); @@ -665,7 +666,7 @@ void __init kfence_init(void) } WRITE_ONCE(kfence_enabled, true); - schedule_delayed_work(&kfence_timer, 0); + queue_delayed_work(system_power_efficient_wq, &kfence_timer, 0); pr_info("initialized - using %lu bytes for %d objects at 0x%p-0x%p\n", KFENCE_POOL_SIZE, CONFIG_KFENCE_NUM_OBJECTS, (void *)__kfence_pool, (void *)(__kfence_pool + KFENCE_POOL_SIZE)); _ Patches currently in -mm which might be from elver@google.com are kfence-zero-guard-page-after-out-of-bounds-access.patch kfence-await-for-allocation-using-wait_event.patch kfence-maximize-allocation-wait-timeout-duration.patch kfence-use-power-efficient-work-queue-to-run-delayed-work.patch