Re: fork/exec

> > Hm, seems messy.  Note that setting up MyProc does *not*
> > require LWLock access, only a spinlock (which is obviously necessary
> > to avoid circularity).  It might be best to replace ShmemIndexLock
> > with a spinlock to reduce the amount of infrastructure that has to
> > be live before we can make use of the shmem index hashtable.
>
> That looks like a great idea.

Worked a treat.

I've created a new spin lock. Should I send along a patch, or instead try to
use the existing ShmemLock?

(Note that, since ShmemAlloc locks/releases ShmemLock, ShmemInitStruct would
have to in some way indicate to ShmemAlloc that it was already holding...
which I can't imagine anyone is too keen on).

Cheers,
Claudio

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