On Thu, Feb 05, 2009 at 09:00:43PM +0100, Helge Deller wrote: > dann frazier wrote: > > On Mon, Feb 02, 2009 at 07:04:48PM +0100, Lucas Nussbaum wrote: > >> ruby1.9 still fails to build on hppa and alpha. > >> > >> On hppa, it's caused by a kernel bug, which was partially fixed (at > >> least the kernel doesn't panic() anymore). Since the issue is related to > >> threading, it is possible that retrying could make it build > >> successfully. > > > > fyi, I've retried it numerous times on both buildds with no > > luck. We're not crashing the buildd anymore - thanks to Helge's fix - > > The kudos belong to James Bottomley btw. I did debugging and testing, > but James gave me the final hint to the solution then... > > > but the build hangs indefinitely. I've no objection to it being > > retried again of course (and I'm not the buildd admin anyway) - I just > > want to set your expectations. > > I tried a few times now to find the bug. I'm not sure if it's really due to > a) a kernel bug (probably) > b) the fact that hppa still uses Linuxthreads (although Dann mentioned > in another mail that he saw similar problems with another server which > used NPTL instead of Linuxthreads)
Since I don't remember the last time I tried, I've started another build in my NPTL chroot running a fixed kernel to verify that I'm still seeing it. > c) wrong pthread coding in ruby1.9 > > If it's due to a) (kernel bug), then it's hard to find and track down. > I concentrated on b) and c) for now. LT uses a few signals to synchronize the > threads, and ruby plays some small but bad games with signals in it's code, > e.g. > rb_disable_interrupt() and rb_enable_interrupt() in signal.c. > With the attached patch/hack below I tried to work around possible LT-related > cornercases > in ruby1.9, but the issue stays the same: "make test" will make the ruby > testsuite hang in the "test_thread.rb" test. It seems some thread is waiting > for a signal which will not arrive, since the other thread is a zombie > already.... > > Anyway, it would be nice if someone with ruby knowledge could reduce > the testsuite, so that it will be easier to reproduce the bug. I'm a little > lost at this stage. Now since the hppa kernel doesn't crash any longer, > building > such a testcase should be much easier to create. -- dann frazier -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
