Re: make -jN (n>1) ineffective in 4.2.0-rc on AMD Phenom

Path	csiph.com!aioe.org!gothmog.csi.it!bofh.it!news.nic.it!robomod
From	Jeff Epler <jepler@unpythonic.net>
Newsgroups	linux.kernel
Subject	Re: make -jN (n>1) ineffective in 4.2.0-rc on AMD Phenom
Date	Wed, 15 Jul 2015 04:30:01 +0200
Message-ID	<pMkCl-2kr-1@gated-at.bofh.it> (permalink)
References	<pMi7x-72M-17@gated-at.bofh.it>
X-Original-To	Ken Moffat <zarniwhoop@ntlworld.com>
MIME-Version	1.0
Content-Type	text/plain; charset=us-ascii
Content-Disposition	inline
User-Agent	Mutt/1.5.23 (2014-03-12)
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	18
Organization	linux.* mail to news gateway
X-Original-Cc	linux-kernel@vger.kernel.org
X-Original-Date	Tue, 14 Jul 2015 21:23:31 -0500
X-Original-Message-ID	<20150715022331.GE70510@unpythonic.net>
X-Original-References	<20150714233920.GA15565@milliways>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	aioe.org linux.kernel:1184208

Show key headers only | View raw

GNU Make 4.1 has a problem that causes it to be unable to use the
desired level of parallelism.  Two people have reported that reverting a
commit which changes from fork to vfork "fixes" it. (i'm one of them,
unfortunately posting as anonymous in the tracker).

Hoewver, if you are also seeing the linux kernel version as relevant to
producing the problem, that's quite interesting, and the underlying
cause may be different.  We reproduced the problem on a range of older
kernels, from 3.2 to 3.18.

http://savannah.gnu.org/bugs/?44555

Jeff
--
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/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: make -jN (n>1) ineffective in 4.2.0-rc on AMD Phenom Jeff Epler <jepler@unpythonic.net> - 2015-07-15 04:30 +0200
  Re: make -jN (n>1) ineffective in 4.2.0-rc on AMD Phenom Ken Moffat <zarniwhoop@ntlworld.com> - 2015-07-15 14:30 +0200

csiph-web