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 87B80C433FE for ; Wed, 8 Sep 2021 02:54:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6482D61102 for ; Wed, 8 Sep 2021 02:54:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347049AbhIHCz0 (ORCPT ); Tue, 7 Sep 2021 22:55:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:51466 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347442AbhIHCzY (ORCPT ); Tue, 7 Sep 2021 22:55:24 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5EF6D61100; Wed, 8 Sep 2021 02:54:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1631069657; bh=DaIw1rmgQkHmn0fpeO3bJmsCxd0OerLlZ+j/zvAjDks=; h=Date:From:To:Subject:In-Reply-To:From; b=P14BQnHKaQ4aB957N/t2F5z+SeEyS811BW54eAwlD+X8hFM1ETtUjUNCj9OgnbJEg 9bQ8hMSRu1vAsjsFQGw3+VlvWu7EdLTCu5sIN3Ios8Jh/kXErIXmkbavbxnzV2vPf0 EQ/q6251O2c0OkwdCCVqKeMO+ELVkYdpww4BYCbA= Date: Tue, 07 Sep 2021 19:54:17 -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, quic_qiancai@quicinc.com, rientjes@google.com, tglx@linutronix.de, torvalds@linux-foundation.org, vbabka@suse.cz Subject: [patch 025/147] mm, slub: only disable irq with spin_lock in __unfreeze_partials() Message-ID: <20210908025417.Wvi7oll1b%akpm@linux-foundation.org> In-Reply-To: <20210907195226.14b1d22a07c085b22968b933@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: only disable irq with spin_lock in __unfreeze_partials() __unfreeze_partials() no longer needs to have irqs disabled, except for making the spin_lock operations irq-safe, so convert the spin_locks operations and remove the separate irq handling. Link: https://lkml.kernel.org/r/20210904105003.11688-26-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: Qian Cai Cc: Sebastian Andrzej Siewior Cc: Thomas Gleixner Signed-off-by: Andrew Morton --- mm/slub.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) --- a/mm/slub.c~mm-slub-only-disable-irq-with-spin_lock-in-__unfreeze_partials +++ a/mm/slub.c @@ -2352,9 +2352,7 @@ static void __unfreeze_partials(struct k { struct kmem_cache_node *n = NULL, *n2 = NULL; struct page *page, *discard_page = NULL; - unsigned long flags; - - local_irq_save(flags); + unsigned long flags = 0; while (partial_page) { struct page new; @@ -2366,10 +2364,10 @@ static void __unfreeze_partials(struct k n2 = get_node(s, page_to_nid(page)); if (n != n2) { if (n) - spin_unlock(&n->list_lock); + spin_unlock_irqrestore(&n->list_lock, flags); n = n2; - spin_lock(&n->list_lock); + spin_lock_irqsave(&n->list_lock, flags); } do { @@ -2398,9 +2396,7 @@ static void __unfreeze_partials(struct k } if (n) - spin_unlock(&n->list_lock); - - local_irq_restore(flags); + spin_unlock_irqrestore(&n->list_lock, flags); while (discard_page) { page = discard_page; _