From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dan.rpsys.net (5751f4a1.skybroadband.com [87.81.244.161]) by mail.openembedded.org (Postfix) with ESMTP id DAAD473BB8 for ; Tue, 5 May 2015 20:06:55 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by dan.rpsys.net (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id t45K5lOI016109; Tue, 5 May 2015 21:06:53 +0100 Received: from dan.rpsys.net ([127.0.0.1]) by localhost (dan.rpsys.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id SLshcCEPYtdr; Tue, 5 May 2015 21:06:53 +0100 (BST) Received: from [192.168.3.10] ([192.168.3.10]) (authenticated bits=0) by dan.rpsys.net (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id t45K6fhu016154 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 5 May 2015 21:06:53 +0100 Message-ID: <1430856401.8074.13.camel@linuxfoundation.org> From: Richard Purdie To: Ed Bartosh Date: Tue, 05 May 2015 21:06:41 +0100 In-Reply-To: <1430748689-7217-1-git-send-email-ed.bartosh@linux.intel.com> References: <1430490525.18360.14.camel@linuxfoundation.org> <1430748689-7217-1-git-send-email-ed.bartosh@linux.intel.com> X-Mailer: Evolution 3.12.10-0ubuntu1~14.10.1 Mime-Version: 1.0 Cc: openembedded-core@lists.openembedded.org Subject: Re: [PATCH] kernel.bbclass: Fix race condition X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 May 2015 20:07:00 -0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit On Mon, 2015-05-04 at 17:11 +0300, Ed Bartosh wrote: > Race condition between do_compile_kernelmodules and do_shared_workdir > tasks occurs when do_compilemodules changes files in include/generated/* > while do_shared_workdir tries to copy them to shared working directory. > > Functionality of do_shared_workdir has been moved to separate function > mk_shared_workdir and called from do_kernel_compile. do_shared_workdir > left in the code as it may be used in many recipes. > > [YOCTO #7321] > > Signed-off-by: Ed Bartosh > Signed-off-by: Bruce Ashfield > --- > meta/classes/kernel.bbclass | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass > index 125ed88..13c0180 100644 > --- a/meta/classes/kernel.bbclass > +++ b/meta/classes/kernel.bbclass > @@ -192,6 +192,8 @@ kernel_do_compile() { > if test "${KERNEL_IMAGETYPE_FOR_MAKE}.gz" = "${KERNEL_IMAGETYPE}"; then > gzip -9c < "${KERNEL_IMAGETYPE_FOR_MAKE}" > "${KERNEL_OUTPUT}" > fi > + > + mk_shared_workdir > } > > do_compile_kernelmodules() { > @@ -245,7 +247,7 @@ emit_depmod_pkgdata() { > > PACKAGEFUNCS += "emit_depmod_pkgdata" > > -do_shared_workdir () { > +mk_shared_workdir () { > cd ${B} > > kerneldir=${STAGING_KERNEL_BUILDDIR} > @@ -289,6 +291,14 @@ do_shared_workdir () { > fi > } > > +# NOTE!!! Functionality of do_shared_workdir has been moved to mk_shared_workdir > +# and called from kernel_do_compile. > +# It caused race condition with do_compile_kernelmodules when it runs > +# in parallel with do_compile_kernelmodules > +do_shared_workdir () { > + : > +} > + > # We don't need to stage anything, not the modules/firmware since those would clash with linux-firmware > sysroot_stage_all () { > : This fails on the autobuilder with a missing kernel-None package. Building lttng-modules, then looking at the package dependencies 100% reproduces. The problem is this line: echo "${KERNEL_VERSION}" > $kerneldir/kernel-abiversion since KERNEL_VERSION is obtained from ${B} via: KERNEL_VERSION = "${@get_kernelversion_headers('${B}')}" and ${B} isn't populated when the do_compile shell script is generated resulting in the file containing "None". Cheers, Richard