Re: [RFC 0/12] introduce down_write_killable for rw_semaphore

[Ingo Molnar]

* Michal Hocko <mhocko@xxxxxxxxxx> wrote:

> > > Why? Each syscall already is killable as the task might be killed by the OOM 
> > > killer.
> > 
> > Not all syscalls are interruptible - for example sys_sync() isn't:
> 
> I guess we are talking past each other. [...]

Heh, you are being polite, I think what happened is that I was being dense and 
didn't understand your point:

> [...] What I meant was that while all syscalls are allowed to not return to the 
> userspace because the task might get killed but not all of them accept to get 
> interrupted by a signal and return with EINTR. None of the man page of mmap, 
> mremap, mlock, mprotect list EINTR as a possibility so I would be really afraid 
> of returning an unexpected error code.

Indeed.

> Does this make more sense now?

It does!

Thanks,

	Ingo
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