On Wed, Sep 07, 2005 at 10:14:16AM +0100, Maciej W. Rozycki wrote: > > > So, the process can not be kill by SIGKILL. In 2.6.12, 'sigkill > > > priority fix' was applied to __dequeue_signal(), but it does not help > > > while the SIGTRAP is queued to tsk->pending but SIGKILL (by kill > > > command) is queued to tsk->signal->shared_pending. > > > > The behaviour of not advancing the EPC beyond the faulting instruction is > > part of the problem - but I believe that was the usual behaviour for > > MIPS UNIXoid operating systems. > > Well, SIGKILL should always work and frankly I can't see a reason to > return back to user space in the affected context in the first place. > What's left in EPC shouldn't matter. I said it's part of the problem - not that it should be changed. The behaviour as far as I can say is also standard for MIPS unixoid operating systems. That said, I definately prefer the approach of Atushi's suggested fix #2. The other question is why we try to continue if delivering a signal failed and we already know that repeated attempts would fail again. Ralf
