Re: fork/exec

> Claudio Natoli <claudio(dot)natoli(at)memetrics(dot)com> writes:
> > Would it be possible to re-jig ShmemInitStruct to not
> require locking
>
> That strikes me as entirely unsafe.

Well, an implicit assumption in asking if it was "possible" was if it was
possible safely...

> Probably the best way to model this now is to put a pointer (or whatever
> is needed) to the LWLock array into the shmem segment header, whence
> it can be grabbed without any locking. This will allow a new backend's
> lock manager to be initialized immediately. Then we can safely (ie,
> with locking) initialize access to the shmem index hashtable (it might
> take another pointer in the segment header to find it) and then
> everything else can be looked up in the index hashtable.

Agreed. But I think we'd also need to pass ProcGlobal and ProcStructLock,
and move the InitProcess call to be made earlier (so that the MyProc
structure is initialized, which is a requirement for locking). Right?

Claudio

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