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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 D81E5CA9EAF for ; Thu, 24 Oct 2019 23:59:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF285222C2 for ; Thu, 24 Oct 2019 23:59:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571961554; bh=a/612v51V67JQto4Q9B5ZAq4SDuSUffERC3MjVZlvzQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=RwkdUkZxGnKazZYRM+YyiCPvr21sVz8WRj6m3gvpj2Wz0w6WPXU3+bKiB8Nhi7Aa/ aBgfC42OJFOsEpahooJ+FVfzOZ6w6k/LWP2PQGiieHi+Scj4PVoSicHB06YTJFulSm cm/8kqQaQBKwU6laN3mzXNJ2jPQqwp76Rv2QfqCg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387519AbfJXX7K (ORCPT ); Thu, 24 Oct 2019 19:59:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:57372 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731922AbfJXX7J (ORCPT ); Thu, 24 Oct 2019 19:59:09 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0D04A21BE5; Thu, 24 Oct 2019 23:59:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571961548; bh=a/612v51V67JQto4Q9B5ZAq4SDuSUffERC3MjVZlvzQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=FLKyYhRTbZ+/+IsLcbdEP5BKSXEhbWMmIVlLS9FtMbHpRTEcfHgQeEPyhskQ1t1CU xncLjQCMgcgw92AAmidj76BEJIazepTQm+zp6MZzE8V4iXprTMLgEjFOJjahfRZWGD bm9roxJxzS9yzjC8jMbJtKm4MnaSA47vUui31rco= Date: Thu, 24 Oct 2019 16:59:07 -0700 From: Andrew Morton To: Andrey Konovalov Cc: USB list , KVM list , virtualization@lists.linux-foundation.org, netdev , LKML , Dmitry Vyukov , Greg Kroah-Hartman , Alan Stern , "Michael S . Tsirkin" , Jason Wang , Arnd Bergmann , Steven Rostedt , David Windsor , Elena Reshetova , Anders Roxell , Alexander Potapenko , Marco Elver Subject: Re: [PATCH v2 0/3] kcov: collect coverage from usb and vhost Message-Id: <20191024165907.d56f8050b5097639263c0a41@linux-foundation.org> In-Reply-To: References: <20191023150413.8aa05549bd840deccfed5539@linux-foundation.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 24 Oct 2019 14:47:31 +0200 Andrey Konovalov wrote: > > is it expected that the new kcov feature will be used elsewhere in the > > kernel? > > > > If the latter, which are the expected subsystems? > > Currently we encountered two cases where this is useful: USB and vhost > workers. Most probably there are more subsystems that will benefit > from this kcov extension to get better fuzzing coverage. I don't have > a list of them, but the provided interface should be easy to use when > more of such cases are encountered. It would be helpful to add such a list to the changelog. Best-effort and approximate is OK - just to help people understand the eventual usefulness of the proposal.