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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 D1D63C76186 for ; Mon, 29 Jul 2019 20:03:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0AF8205F4 for ; Mon, 29 Jul 2019 20:03:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430600; bh=v5mz+8uSPkvbCgFpmcM+ztEYPXmGsmQINzDjde4OXJU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=0uVql/NZetzOTVGn3rJ245Fw0wNf5gybCJHE6/64axFidJj/hturgmdPTZU1j+SVK urOnhEjVECKm4Ypx+kvLdH3W8oJei90TSDnwp37Mfu0M9Wp2QmQhQGJCy08hHEVL02 Q/hZHThJrPL7AYEFeTghAYC4KQBi/cgNokuFvThU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728150AbfG2UDU (ORCPT ); Mon, 29 Jul 2019 16:03:20 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:39952 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389655AbfG2TrY (ORCPT ); Mon, 29 Jul 2019 15:47:24 -0400 Received: by mail-pf1-f194.google.com with SMTP id p184so28539471pfp.7; Mon, 29 Jul 2019 12:47:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=2JgYHzqNnYMbq7QqePEAwhLQIzlDp4XtBvYAFqSnWLk=; b=LPpKEy+A5eKaoM6ZZUwmP4ih1i45Cfa5UJ19jSn6m23KtwH5q1K7qnK69JmnVU8AgB 17ntomkNGHdLJYXaSO2jdDsif7xbc53qoQ+CWC/RF1L5zClPyMx7JXUGZAh1BQgPkJpb W8MjQqNFV2pcDyI4/HhKljCNJla9si10VOwB1ogAbDJ44LVF3x5qDRiYg8O5qZqGwriG o84XT8dTON0IPRTmft3svncKt/seI/0ifmxgJtpjaAGMoQ5tMbRyw4eVX0ls9a5RL2KS Ti8q3EG+yBbiuNzYI8d1RYplzyglgivxtwPvIqMLP73KeEcQq5BW1YRhxJc5rQJea6We N5iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=2JgYHzqNnYMbq7QqePEAwhLQIzlDp4XtBvYAFqSnWLk=; b=e9KAFPwPNtvtjC8oKvk3WGgiCjXI+72xV1UXr/8A4gsgil/B9+5eFsR9MrtqpqZBbU 3IrgFAvxdIoi4vrX5jQEViQFqN1ZE5jnxxi+8jXGuMSt9zfYXDcp3Y6/+BeQIFv0jToo wZfjJ89QSQODPw0ZbEhffgQXqxtXLf+pvUdzSdRxVXay7+zDlUF8at+cTCxZMvQOQAPc RQSSjeKeUx8Xkoy/smkztrLUekgfGC+jaRf9DxoGc9Ck2HHMWLBcx1qsaIh9/JVDNNS4 ZXb4RiPFyh2xr+YSpxY7kwhyzQLLzbBoatsIwxPry0peh9yOYO4+R6rB+Q+DWItXXb4v pR+g== X-Gm-Message-State: APjAAAVzC7DiCrC8zr8YSWvPogf8dzuTu7NWido+k11uLZibNX5Ugdes INyoyoR83Ps7XCqwvyrKgAE= X-Google-Smtp-Source: APXvYqwBf0nTxIgL92NZbxqAJPF/sLgeYwP6UdQlrpMicCppeAM83QBPHj4IGPp5tG6F6kCKrlj/3Q== X-Received: by 2002:aa7:8102:: with SMTP id b2mr38661685pfi.105.1564429643669; Mon, 29 Jul 2019 12:47:23 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::1:309b]) by smtp.gmail.com with ESMTPSA id a25sm36604374pfo.60.2019.07.29.12.47.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 29 Jul 2019 12:47:23 -0700 (PDT) Date: Mon, 29 Jul 2019 12:47:21 -0700 From: Tejun Heo To: Daniel Jordan Cc: Steffen Klassert , Herbert Xu , Lai Jiangshan , Peter Zijlstra , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC 3/9] workqueue: require CPU hotplug read exclusion for apply_workqueue_attrs Message-ID: <20190729194721.GG569612@devbig004.ftw2.facebook.com> References: <20190725212505.15055-1-daniel.m.jordan@oracle.com> <20190725212505.15055-4-daniel.m.jordan@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190725212505.15055-4-daniel.m.jordan@oracle.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 25, 2019 at 05:24:59PM -0400, Daniel Jordan wrote: > Change the calling convention for apply_workqueue_attrs to require CPU > hotplug read exclusion. > > Avoids lockdep complaints about nested calls to get_online_cpus in a > future patch where padata calls apply_workqueue_attrs when changing > other CPU-hotplug-sensitive data structures with the CPU read lock > already held. > > Signed-off-by: Daniel Jordan Acked-by: Tejun Heo Please feel free to route with the rest of the patchset. Thanks. -- tejun