Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932134AbbEKOCg (ORCPT ); Mon, 11 May 2015 10:02:36 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:45289 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754456AbbEKOC3 (ORCPT ); Mon, 11 May 2015 10:02:29 -0400 From: Chris J Arges To: mmarek@suse.cz Cc: riku.voipio@linaro.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] builddeb: parallelize debug module installation Date: Mon, 11 May 2015 09:02:26 -0500 Message-Id: <1431352946-6691-3-git-send-email-chris.j.arges@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431352946-6691-1-git-send-email-chris.j.arges@canonical.com> References: <1431352946-6691-1-git-send-email-chris.j.arges@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2236 Lines: 54 When building the dbg package, we use a large 'for module in $(find' loop that can be easily parallelized by using 'find | xargs'. This patch modifies this loop to use the later paradigm. In addition, check if the user has requested a parallel build with make. If so, add the appropriate flags to xargs to set MAXPROCS (-P) equal to the number of processing units on the system. Signed-off-by: Chris J Arges --- scripts/package/builddeb | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/scripts/package/builddeb b/scripts/package/builddeb index 88dbf23..5849f0c 100755 --- a/scripts/package/builddeb +++ b/scripts/package/builddeb @@ -152,16 +152,21 @@ if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then rmdir "$tmpdir/lib/modules/$version" fi if [ -n "$BUILD_DEBUG" ] ; then - for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do - module=lib/modules/$module - mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module) + # If we've invoked make with -j, then parallelize; otherwise + # just use a single process. + procs=1 + test "${MAKEFLAGS#*-j}" != "${MAKEFLAGS}" && procs=`getconf _NPROCESSORS_ONLN` + find $tmpdir/lib/modules/ -name *.ko -printf '%P\n' | xargs -n1 -P${procs} -I {} sh -c ' + mkdir -p $(dirname '"$dbg_dir"'/usr/lib/debug/lib/modules/$1);'" # only keep debug symbols in the debug file - $OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module + $OBJCOPY --only-keep-debug $tmpdir/lib/modules/{} \ + $dbg_dir/usr/lib/debug/lib/modules/{}; # strip original module from debug symbols - $OBJCOPY --strip-debug $tmpdir/$module + $OBJCOPY --strip-debug $tmpdir/lib/modules/{}; # then add a link to those - $OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module - done + $OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/lib/modules/{} \ + $tmpdir/lib/modules/{}; + " -- {} fi fi -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/