Re: [Xen-devel] [PATCH] stubdom: disable parallel build

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-07-31 at 09:44 +0100, Olaf Hering wrote:
> On Tue, Jul 31, Ian Campbell wrote:
> 
> > On Mon, 2012-07-30 at 17:35 +0100, Olaf Hering wrote:
> > > # HG changeset patch
> > > # User Olaf Hering <olaf@xxxxxxxxx>
> > > # Date 1343666089 -7200
> > > # Node ID ccbebdbe44da0460408172338af9daab31e56788
> > > # Parent  db8adce4f09307a90f96103f7fd67efa97fc9ac0
> > > stubdom: disable parallel build
> > > 
> > > Recently I changed my rpm xen.spec file from doing
> > > 'make -C tools -j N && make stubdom' to 'make -j N stubdom' because
> > > stubdom depends on tools, so both get built.
> > > The result was the failure below.
> > 
> > I always do -j12 builds of the stubdom sub=tree and I don't see
> > parallelisation issues. The stubdom build is pretty big and time
> > consuming so it would be a shame to needlessly linearise it.
> 
> Is it always a clean build?

It always works if that is what you are asking.
> For me nothing in stubdom is built in parallel, if I interpret the
> repated output of 'ps fax' right.

I see at least some parallelism, although I don't know what proportion
of the build is.

> 
> Olaf
> 
> > > make[2]: *** INTERNAL: readdir: Bad file descriptor
> > 
> > This is an internal error inside make? That's surely more critical than
> > any problem with our build system and needs to be solved before adding
> > workarounds to our tree.
> 
> Perhaps there is an issue, yes. I will see if I find something.
> 
> Olaf



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