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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 337BAC433DB for ; Tue, 16 Feb 2021 19:01:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E819064E28 for ; Tue, 16 Feb 2021 19:01:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231139AbhBPTBC (ORCPT ); Tue, 16 Feb 2021 14:01:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230227AbhBPTAy (ORCPT ); Tue, 16 Feb 2021 14:00:54 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8DD8C06174A for ; Tue, 16 Feb 2021 11:00:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; 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=si3nwQgk4WhPPdjDOtwTA5HyTVJePHR0iIQ1Hc/iHJY=; b=oNxajjxR473tJoLDOhnWwJokbj vrpfUVAfcvgiuerKHidUOcPxCI2UuViQRESA2ZLN2qTO0krpjdP+dSwFC6CMfv+H2S9wqgd1jXhBl RDCpKa5VVkq83HC7phiF3DIaCOjsi4iKLY+TrWOqENoWIXvtaBMaqwzKcoqr2oJuBKEOfmvyJrEfG rVx85UMbASJfL+BvBMjlavN9YgVGoHQfCQ+/IGF9LGk4S7LuovhenhdH0m1ErcdujM4GBo7VY3u9T arnfYSar1vYskfYNBHPh2JyxShC++tiDJ8swjy5djoI/aVycHqXZnirFTMIrLJ7shLsPYLDtw1I2B vTiT6q4A==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1lC5Zq-0003hh-Ox; Tue, 16 Feb 2021 19:00:02 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 0FB103011E6; Tue, 16 Feb 2021 19:59:58 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id EEED12BC732E8; Tue, 16 Feb 2021 19:59:57 +0100 (CET) Date: Tue, 16 Feb 2021 19:59:57 +0100 From: Peter Zijlstra To: Nadav Amit Cc: Thomas Gleixner , "linux-kernel@vger.kernel.org" , Andy Lutomirski , Dave Hansen , Rik van Riel , Josh Poimboeuf Subject: Re: [PATCH v5 1/8] smp: Run functions concurrently in smp_call_function_many_cond() Message-ID: References: <20210209221653.614098-1-namit@vmware.com> <20210209221653.614098-2-namit@vmware.com> <457D8FBC-8F64-48E9-B9E2-1A316DB0C2B6@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <457D8FBC-8F64-48E9-B9E2-1A316DB0C2B6@vmware.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 16, 2021 at 06:53:09PM +0000, Nadav Amit wrote: > > On Feb 16, 2021, at 8:32 AM, Peter Zijlstra wrote: > > I'm not sure I can explain it yet. It did get me looking at > > on_each_cpu() and it appears that wants to be converted too, something > > like the below perhaps. > > Looks like a good cleanup, but I cannot say I understand the problem and how > it would solve it. Err... Yeah, me neither. Bit of a mystery so far.