Date: Wed, 10 Feb 1999 11:59:05 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Terry Lambert <tlambert@primenet.com> Cc: kuku@gilberto.physik.RWTH-Aachen.DE, hackers@FreeBSD.ORG Subject: Re: portability of shm, mmap, pipes and socket IPC Message-ID: <199902101959.LAA85684@apollo.backplane.com> References: <199902101839.LAA18447@usr07.primenet.com>
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:> true on all implementations that I know of. It is also appropriate -
:> the validity of the mmap()'d data only extends to the logical end of
:> file.
:
:Yes, yes, that's not the problem.
:
:The problem is that INN apparently still fails when using mmap without
:msync. The utility of msync is overrated; the code does not actually
:do what the manual page claims it does, in any case.
'apparently still fails'. In otherwords, you aren't sure whether
it's a bug in INN or a bug in the OS. You don't know why exactly
INN is not working, but you are blaming FreeBSD.
There could be a bug in FreeBSD, but unless someone can track it down
a little better then "Well, this one program doesn't work so it MUST
be a bug in FreeBSD", there isn't much we can do about it now is there!
From where I sit, I don't see any bugs.
:> All semaphores are inadequately resource tracked in _exit(), it's a
:> problem inherited from the SYSV implementation.
:
:Shared memory is badly tracked. But semaphores are supposed to be
:capable of being counted out by _exit(), per the SysV man pages
:for semop(2) an exit(2):
:FreeBSD either doesn't do this, or the FreeBSD manual pages are in error.
:
:
: Terry Lambert
: terry@lambert.org
FreeBSD supports it just fine. If there is a bug, spell it out and
demonstrate it and we'll fix it.
-Matt
Matthew Dillon
<dillon@backplane.com>
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