From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id CA1166B0007 for ; Thu, 8 Feb 2018 18:36:56 -0500 (EST) Received: by mail-wm0-f70.google.com with SMTP id g16so2906841wmg.6 for ; Thu, 08 Feb 2018 15:36:56 -0800 (PST) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id l6si726224wrb.94.2018.02.08.15.36.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Feb 2018 15:36:55 -0800 (PST) Date: Thu, 8 Feb 2018 15:36:52 -0800 From: Andrew Morton Subject: Re: [RFC PATCH v1 00/13] lru_lock scalability Message-Id: <20180208153652.481a77e57cc32c9e1a7e4269@linux-foundation.org> In-Reply-To: <20180131230413.27653-1-daniel.m.jordan@oracle.com> References: <20180131230413.27653-1-daniel.m.jordan@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: daniel.m.jordan@oracle.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, aaron.lu@intel.com, ak@linux.intel.com, Dave.Dice@oracle.com, dave@stgolabs.net, khandual@linux.vnet.ibm.com, ldufour@linux.vnet.ibm.com, mgorman@suse.de, mhocko@kernel.org, pasha.tatashin@oracle.com, steven.sistare@oracle.com, yossi.lev@oracle.com On Wed, 31 Jan 2018 18:04:00 -0500 daniel.m.jordan@oracle.com wrote: > lru_lock, a per-node* spinlock that protects an LRU list, is one of the > hottest locks in the kernel. On some workloads on large machines, it > shows up at the top of lock_stat. Do you have details on which callsites are causing the problem? That would permit us to consider other approaches, perhaps. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org