Re: ptrace problem in 2.6.9
> Stephane> Hi Roland, I have some problems with the recent
> Stephane> modifications to the Ptrace infrastructure in 2.6.9
> Stephane> release. Basically I have the smiple test program attached
> Stephane> to this E-mail and it hangs in 2.6.9 but not in
> Stephane> 2.6.9-rc4. Somehow the first waitpid() does not return. It
> Stephane> is not clear to me why. Is there something Ineed to
> Stephane> change in the call itself? I am running all of this on a
> Stephane> 2-way IA-64 machine with 2.6.9. I have not tried on x86.
>
> David> Shoot, I think I ran into the same problem yesterday when
> David> running the GCC testsuite. In my case, the problem seemed to
> David> disappear (mostly) after downgrading "expect" from the
> David> "unstable" to the "stable" version, but the symptoms where
> David> exactly like in your case: waitpid() didn't return, so I
> David> suspect it really was the kernel's fault. I'll try Roland's
> David> patch on Monday.
>
> Then again, may be not: it appears that the bug only relates to
> PTRACE'd processes, which "expect" is unlikely to do. Oh, well, would
> have been too easy.
>
In any case, that fixed the problem for me.
--
-Stephane
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