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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 A3586C48BCF for ; Wed, 9 Jun 2021 13:29:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2DC3B6124C for ; Wed, 9 Jun 2021 13:29:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2DC3B6124C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gentwo.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 91B256B006C; Wed, 9 Jun 2021 09:29:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F21E6B0072; Wed, 9 Jun 2021 09:29:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7B9946B0074; Wed, 9 Jun 2021 09:29:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0099.hostedemail.com [216.40.44.99]) by kanga.kvack.org (Postfix) with ESMTP id 4858F6B006C for ; Wed, 9 Jun 2021 09:29:38 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A6AF4181AEF2A for ; Wed, 9 Jun 2021 13:29:37 +0000 (UTC) X-FDA: 78234267594.28.42C4CB0 Received: from gentwo.de (vmi485042.contaboserver.net [161.97.139.209]) by imf08.hostedemail.com (Postfix) with ESMTP id 4F2208019582 for ; Wed, 9 Jun 2021 13:29:33 +0000 (UTC) Received: by gentwo.de (Postfix, from userid 1001) id F1C9FB0026B; Wed, 9 Jun 2021 15:29:35 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by gentwo.de (Postfix) with ESMTP id F022CB000A9; Wed, 9 Jun 2021 15:29:35 +0200 (CEST) Date: Wed, 9 Jun 2021 15:29:35 +0200 (CEST) From: Christoph Lameter To: Vlastimil Babka cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Rientjes , Pekka Enberg , Joonsoo Kim , Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Peter Zijlstra , Jann Horn Subject: Re: [RFC v2 02/34] mm, slub: allocate private object map for sysfs listings In-Reply-To: <20210609113903.1421-3-vbabka@suse.cz> Message-ID: References: <20210609113903.1421-1-vbabka@suse.cz> <20210609113903.1421-3-vbabka@suse.cz> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Authentication-Results: imf08.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf08.hostedemail.com: domain of cl@gentwo.de designates 161.97.139.209 as permitted sender) smtp.mailfrom=cl@gentwo.de X-Stat-Signature: 48bgu8jme7fufytxsn84eegw1mxnt744 X-Rspamd-Queue-Id: 4F2208019582 X-Rspamd-Server: rspam06 X-HE-Tag: 1623245373-263634 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 9 Jun 2021, Vlastimil Babka wrote: > The handlers of sysfs files alloc_calls and free_calls also currently use this > shared bitmap, but their syscall context makes it straightforward to allocate a > private map before entering locked sections, so switch these processing paths > to use a private bitmap. Historically that was the case but there were various issues with recursion via sysfs etc etc. alloca was too stack intensive.... Hopefully this one will last.