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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT 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 0ECC8C43441 for ; Fri, 9 Nov 2018 19:16:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C14402086C for ; Fri, 9 Nov 2018 19:16:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C14402086C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=stgolabs.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728803AbeKJE6b (ORCPT ); Fri, 9 Nov 2018 23:58:31 -0500 Received: from mx2.suse.de ([195.135.220.15]:51824 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727961AbeKJE6b (ORCPT ); Fri, 9 Nov 2018 23:58:31 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 79DCFAF12; Fri, 9 Nov 2018 19:16:33 +0000 (UTC) Date: Fri, 9 Nov 2018 11:16:22 -0800 From: Davidlohr Bueso To: Todd Kjos Cc: chouryzhou@tencent.com, Greg Kroah-Hartman , Arve Hj?nnev?g , Todd Kjos , akpm@linux-foundation.org, "open list:ANDROID DRIVERS" , LKML Subject: Re: [PATCH V3] binder: ipc namespace support for android binder Message-ID: <20181109191622.t4usetsmidtyt7oa@linux-r8p5> References: <5FBCBE569E134E4CA167B91C0A77FD610198F851AC@EXMBX-SZMAIL022.tencent.com> <20181109182654.ojzc7wae3jcivlup@linux-r8p5> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180323 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 09 Nov 2018, Todd Kjos wrote: > >print_binder_proc() drops proc->inner_lock and calls >binder_alloc_print_allocated() which acquires proc->alloc->mutex. >Likewise, print_binder_stats() calls print_binder_proc_stats() which >drops its locks to call binder_alloc_print_pages() which also acquires >proc->alloc->mutex. So binder_procs_lock needs to be a mutex since it >can block on proc->alloc->mutex. Ah, very good then. Thanks, Davidlohr