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Date:      Thu, 1 Jun 2000 12:59:41 +1000 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        Marcel Moolenaar <marcel@cup.hp.com>
Cc:        Michael Reifenberger <root@nihil.plaut.de>, freebsd-emulation@FreeBSD.ORG
Subject:   Re: AW: Oracle8.1.6/Linux inst prob (Is JRE prob).
Message-ID:  <Pine.BSF.4.21.0006011237570.1558-100000@besplex.bde.org>
In-Reply-To: <393578F7.91380DE4@cup.hp.com>

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On Wed, 31 May 2000, Marcel Moolenaar wrote:

> Michael Reifenberger wrote:
> > 
> > Hi,
> > wouldn't it be possible to lower FreeBSD's MINSIGSTKSZ to 2k?
> 
> AFAICT: no.

Um, why not?  It seems to be a completely abritrary value.  It is only
checked at the start of the sigaltstack().  Perhaps it should be
related to PAGE_SIZE. but it is defined to 8192 for all machines.  If
8192 is best for i386's, then it is not best for alphas.  It only has
to be related to the size of the signal frame, so that at least one
signal can be delivered on the signal stack.  Note that the recommended
stack size, SIGSTKSZ, is much larger than MINSIGSTKSZ (32768 larger
for all machines).  Under Linux-2.3.35, SIGSTKSZ is 4 times larger
than MINSIGSTKSZ on all machines, and the values are correctly
machine-dependent (twice as large for alphas as for i386's).

Bruce



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