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 9F98AC433FE for ; Thu, 2 Sep 2021 21:51:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D098610F7 for ; Thu, 2 Sep 2021 21:51:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347602AbhIBVwk (ORCPT ); Thu, 2 Sep 2021 17:52:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:44624 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347612AbhIBVwj (ORCPT ); Thu, 2 Sep 2021 17:52:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A3B5B610A2; Thu, 2 Sep 2021 21:51:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1630619500; bh=CXnhtn0toQdqyd7NwH68P9sp06/6rwnvetrSejIIIYg=; h=Date:From:To:Subject:In-Reply-To:From; b=MAOtWCWZYAUiKljOBGE78H7cczBpuVswMPt6o8mjvqxxPLbBdSsk6yXZoQiIpHwOG YgXX5I/9ngmGxIrjfMhQIihX2X4r7/gCV4qpszA6ZF0dOvqbEnNOCPH3UZgpO/jyNd LtN9+l0LhsMtpJxUXYXYPTJEDmtLLdGWb9hUk+xw= Date: Thu, 02 Sep 2021 14:51:39 -0700 From: Andrew Morton To: akpm@linux-foundation.org, bigeasy@linutronix.de, brouer@redhat.com, cl@linux.com, efault@gmx.de, iamjoonsoo.kim@lge.com, jannh@google.com, linux-mm@kvack.org, mgorman@techsingularity.net, mm-commits@vger.kernel.org, penberg@kernel.org, rientjes@google.com, tglx@linutronix.de, torvalds@linux-foundation.org, vbabka@suse.cz Subject: [patch 032/212] mm, slub: detach whole partial list at once in unfreeze_partials() Message-ID: <20210902215139.SaVR2ei8O%akpm@linux-foundation.org> In-Reply-To: <20210902144820.78957dff93d7bea620d55a89@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 From: Vlastimil Babka Subject: mm, slub: detach whole partial list at once in unfreeze_partials() Instead of iterating through the live percpu partial list, detach it from the kmem_cache_cpu at once. This is simpler and will allow further optimization. Link: https://lkml.kernel.org/r/20210805152000.12817-25-vbabka@suse.cz Signed-off-by: Vlastimil Babka Cc: Christoph Lameter Cc: David Rientjes Cc: Jann Horn Cc: Jesper Dangaard Brouer Cc: Joonsoo Kim Cc: Mel Gorman Cc: Mike Galbraith Cc: Pekka Enberg Cc: Sebastian Andrzej Siewior Cc: Thomas Gleixner Signed-off-by: Andrew Morton --- mm/slub.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/mm/slub.c~mm-slub-detach-whole-partial-list-at-once-in-unfreeze_partials +++ a/mm/slub.c @@ -2344,16 +2344,20 @@ static void unfreeze_partials(struct kme { #ifdef CONFIG_SLUB_CPU_PARTIAL struct kmem_cache_node *n = NULL, *n2 = NULL; - struct page *page, *discard_page = NULL; + struct page *page, *partial_page, *discard_page = NULL; unsigned long flags; local_irq_save(flags); - while ((page = slub_percpu_partial(c))) { + partial_page = slub_percpu_partial(c); + c->partial = NULL; + + while (partial_page) { struct page new; struct page old; - slub_set_percpu_partial(c, page); + page = partial_page; + partial_page = page->next; n2 = get_node(s, page_to_nid(page)); if (n != n2) { _