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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 6D2FBC43381 for ; Fri, 15 Feb 2019 09:34:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 436B1206BA for ; Fri, 15 Feb 2019 09:34:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392884AbfBOJd7 (ORCPT ); Fri, 15 Feb 2019 04:33:59 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59846 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726146AbfBOJd7 (ORCPT ); Fri, 15 Feb 2019 04:33:59 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 806E8CF49A; Fri, 15 Feb 2019 09:33:58 +0000 (UTC) Received: from [10.36.117.138] (ovpn-117-138.ams2.redhat.com [10.36.117.138]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5D0625C234; Fri, 15 Feb 2019 09:33:49 +0000 (UTC) Subject: Re: [RFC][Patch v8 0/7] KVM: Guest Free Page Hinting To: "Wang, Wei W" , Nitesh Narayan Lal , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "pbonzini@redhat.com" , "lcapitulino@redhat.com" , "pagupta@redhat.com" , "yang.zhang.wz@gmail.com" , "riel@surriel.com" , "mst@redhat.com" , "dodgen@google.com" , "konrad.wilk@oracle.com" , "dhildenb@redhat.com" , "aarcange@redhat.com" References: <20190204201854.2328-1-nitesh@redhat.com> <286AC319A985734F985F78AFA26841F73DF68060@shsmsx102.ccr.corp.intel.com> <17adc05d-91f9-682b-d9a4-485e6a631422@redhat.com> <286AC319A985734F985F78AFA26841F73DF6B52A@shsmsx102.ccr.corp.intel.com> <62b43699-f548-e0da-c944-80702ceb7202@redhat.com> <286AC319A985734F985F78AFA26841F73DF6F195@shsmsx102.ccr.corp.intel.com> <19d2d9bd-a9dc-9c5f-6dcc-d456d50b9e10@redhat.com> <286AC319A985734F985F78AFA26841F73DF71F93@shsmsx102.ccr.corp.intel.com> From: David Hildenbrand Openpgp: preference=signencrypt Autocrypt: addr=david@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <286AC319A985734F985F78AFA26841F73DF71F93@shsmsx102.ccr.corp.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 15 Feb 2019 09:33:58 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 15.02.19 10:15, Wang, Wei W wrote: > On Thursday, February 14, 2019 6:01 PM, David Hildenbrand wrote: >> And how to preload without locking? > > The memory is preload per-CPU. It's usually called outside the lock. Right, that works as long as only a fixed amount of pages is needed. I remember that working for some radix tree operations. > > Best, > Wei > -- Thanks, David / dhildenb