From: Jeff King <peff@peff.net>
To: Ingo Molnar <mingo@elte.hu>
Cc: Junio C Hamano <gitster@pobox.com>, git@vger.kernel.org
Subject: Re: [spurious parallel build bug] make -j fails with: "mv: mv: cannot stat `perl.mak': No such file or directory"
Date: Mon, 27 Apr 2009 16:19:20 -0400 [thread overview]
Message-ID: <20090427201920.GD4067@coredump.intra.peff.net> (raw)
In-Reply-To: <20090427183451.GA23862@elte.hu>
On Mon, Apr 27, 2009 at 08:34:51PM +0200, Ingo Molnar wrote:
> > I've seen this a few times on the master machine at k.org but
> > haven't seen it elsewhere, perhaps because I do not have an access
> > to 8-way parallelism anywhere else.
>
> btw, this happened on a plain dual-core box. But i couldnt reproduce
> after that.
I've seen it occasionally on a dual-core, as well, but was never able to
track it down. I suspect it is caused by the fact that there are two
rules which recurse into the perl subdir: perl/perl.mak, if needed, will
recurse, as will "all". So I think we are losing the usual parallelism
guard there, and we have two makes running inside "perl" at the same
time, both of which then try to make perl.mak and step on each other.
But I still can't reproduce it at will, so it is hard to test.
-Peff
prev parent reply other threads:[~2009-04-27 20:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-27 9:48 [spurious parallel build bug] make -j fails with: "mv: mv: cannot stat `perl.mak': No such file or directory" Ingo Molnar
2009-04-27 17:01 ` Junio C Hamano
2009-04-27 18:34 ` Ingo Molnar
2009-04-27 20:19 ` Jeff King [this message]
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