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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D61F1C28D13 for ; Mon, 22 Aug 2022 15:44:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236758AbiHVPop (ORCPT ); Mon, 22 Aug 2022 11:44:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236890AbiHVPoU (ORCPT ); Mon, 22 Aug 2022 11:44:20 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44080167EA for ; Mon, 22 Aug 2022 08:43:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=zqT+vapO33dfH5RK6+b+4smufsoheg5AXIp4xVOHEZw=; b=YTgD0QKFHzMjlJ7OSo7AvZfA9k bcEXNOOqjYFGD1xXoikX1CpOKjmlfRRoOE5LZgkE5IDhmdy8Iw0D5QECPJ8GYQH6+iO3q1sK0qXPr qV1jS3rVfc8GY3uW+vYonyEpX0MgYA7Eg18rr6c32Kud5Z/aRBUHBf0l683CwxfpFqmogGOK5CheA ywHitgXOTSIsDyrPwWBHY70ZCHwtdmco1hr6773teAVE/YJAD8EEEzPARXS8GUDRUj7p6XEfSMdGG TtoV24HUxNf47IeIq7Vi4q8OkmI4hQU0H0hcJVQ0fkm0S+sI0U6i7JSYc786IeDKz3Y5DBF5ZqaCc gBcbHuRA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=worktop.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1oQ9aA-00579Y-Rx; Mon, 22 Aug 2022 15:43:19 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id 5D24B9804A3; Mon, 22 Aug 2022 17:43:18 +0200 (CEST) Date: Mon, 22 Aug 2022 17:43:18 +0200 From: Peter Zijlstra To: Ravi Bangoria Cc: acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, songliubraving@fb.com, eranian@google.com, alexey.budankov@linux.intel.com, ak@linux.intel.com, mark.rutland@arm.com, megha.dey@intel.com, frederic@kernel.org, maddy@linux.ibm.com, irogers@google.com, kim.phillips@amd.com, linux-kernel@vger.kernel.org, santosh.shukla@amd.com Subject: Re: [RFC v2] perf: Rewrite core context handling Message-ID: References: <20220113134743.1292-1-ravi.bangoria@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 22, 2022 at 05:29:11PM +0200, Peter Zijlstra wrote: > On Tue, Aug 02, 2022 at 11:41:42AM +0530, Ravi Bangoria wrote: > > > > > pulling up the ctx->mutex makes things simpler, but also violates the > > > locking order vs exec_update_lock. > > > > > > Pull that lock up as well... > > > > I'm not able to apply this patch as is but I get the idea. Few > > questions below... > > I was just about to rebase the 'series' to current, let me do that and > get back to you on the specifics. https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/log/?h=perf/wip.rewrite I need to go make dinner, but I'll try and remember how it all was support to work later this evening when the loonies are in bed,