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Date:      Fri, 3 Jan 2003 10:20:15 -0800
From:      Alfred Perlstein <bright@mu.org>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        arch@FreeBSD.ORG, smp@FreeBSD.ORG, jhb@FreeBSD.ORG, jake@FreeBSD.ORG, tanimura@FreeBSD.ORG, alc@FreeBSD.ORG
Subject:   Re: Need help fixing lock ordering with filedesc, proc and pipe.
Message-ID:  <20030103182015.GB33821@elvis.mu.org>
In-Reply-To: <200301031805.h03I5Gt8064163@apollo.backplane.com>
References:  <20030103030805.GS26140@elvis.mu.org> <200301031805.h03I5Gt8064163@apollo.backplane.com>

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* Matthew Dillon <dillon@apollo.backplane.com> [030103 10:05] wrote:
>     Hmm.  There seem to be multiple issues here but would defering the
>     psigio also be a workable solution?  That is, simply add a flag to 
>     the filedesc and return and the caller (or his caller) is responsible
>     for checking the flag and calling psigio in a more controlled situation.
>     This way sigio can be initiated deep in the code without any worries.

No.  Not every object has a filedesc in front of it.  Think of a kernel
subsystem that allocates a socket directly via socreate.

-- 
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
 start asking why software is ignoring 30 years of accumulated wisdom.'

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