bin/42075: tests/fs/ffs/t_renamerace hangs in qemu

[pooka%iki.fi@localhost]

>Number:         42075
>Category:       bin
>Synopsis:       tests/fs/ffs/t_renamerace hangs in qemu
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 17 13:20:01 +0000 2009
>Originator:     Antti Kantee
>Release:        5.99.17
>Organization:
>Environment:
>Description:
Executing tests/fs/ffs/t_renamerace hangs when done in qemu.  I do
not get the same behavior on my desktop (which is running 5.0,
but executing the test compiled from -current sources).

Note that the test sets an atf timeout.  There are probably two
bugs here: a) test case, kernel code or qemu bug b) atf bug which
doesn't properly handle timeout.  It is possible to "unhang" this test
by killing the t_renamerace process.
>How-To-Repeat:
1) install HEAD in qemu
2) cd /usr/tests/fs/ffs
3) atf-run | atf-report
4) ???
5) lack of PROFIT
>Fix:
unknown