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Re: next vforkup chapter: lwpctl
On Tue Feb 15 2011 at 13:05:11 +0000, Alexander Nasonov wrote:
> Antti Kantee wrote:
> > This is not about rumphijack. Look at e.g. sh and make.
> > Even if you do fix them, it's not just limited to malloc either.
> > Anything that uses LWPCTL will be screwed up after vfork.
> Hi Antti,
> Sorry if suggest something stupid but would it be possible to make
> librumphijack pthread-neutral? E.g. use atomic_ops and/or rumpfd as
> synchronization primitives?
In that case you'd have to implement poll/select (and kevent) with the
help of fork(). It would be a much more heavyweight operation, especially
since it causes another rump kernel handshake to happen. Furthermore, you
cannot cache the workers. Well, maybe with __clone(CLONE_FILES), but ...
So, yes, it would be possible, but not a good move since it doesn't
solve any problems (apart from working around this kernel bug) and causes
älä karot toivorikkauttas, kyl rätei ja lumpui piisaa
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