linux-kernel - Re: futex strangeness in 2.6.23-mm1/UML

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Message-Id: <E1IkEJP-0004Qp-00@dorka.pomaz.szeredi.hu>
Date:	Tue, 23 Oct 2007 09:36:27 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	akpm@...ux-foundation.org
CC:	riel@...hat.com, linux-kernel@...r.kernel.org, xemul@...nvz.org,
	raven@...maw.net
Subject: Re: futex strangeness in 2.6.23-mm1/UML

> I guess we can debug it in the old-fashioned ways.  The first of which is
> to palm the problem off on Pavel ;)
> 
> I don't recall seeing a simple step-by-step way by which others can
> reproduce this?

My method is this:

- enable CONFIG_FUSE_FS
- compile fuse from CVS:
 cvs -d:pserver:anonymous@...e.cvs.sourceforge.net:/cvsroot/fuse co -P fuse
 cd fuse
 ./makeconf.sh
 ./configure
 make
 make -C test

- in one shell:
 mkdir /tmp/fuse
 example/fusexmp_fh -d /tmp/fuse

- in another shell:
 mkdir /tmp/test
 test/test /tmp/fuse/tmp/test

The result is normally a completed run with "1 tests failed".  On
2.6.23-mm1, it just hangs after the first test.

I've only tried under UML, but since Rick is seeing it on real HW, I
guess this method may work there as well.

Miklos
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