Date: Wed, 25 Mar 1998 16:06:43 -0800 From: John-Mark Gurney <gurney_j@efn.org> To: Terry Lambert <tlambert@primenet.com> Cc: "David E. Cross" <dec@phoenix.its.rpi.edu>, eivind@yes.no, shimon@simon-shapiro.org, kgor@inetspace.com, roberto@keltia.freenix.fr, freebsd-hackers@FreeBSD.ORG Subject: Re: How do you increase available SYSV shared memory? Message-ID: <19980325160643.04833@hydrogen.nike.efn.org> In-Reply-To: <199803212148.OAA06529@usr09.primenet.com>; from Terry Lambert on Sat, Mar 21, 1998 at 09:48:27PM %2B0000 References: <Pine.BSF.3.96.980320162848.12108B-100000@phoenix.its.rpi.edu> <199803212148.OAA06529@usr09.primenet.com>
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Terry Lambert scribbled this message on Mar 21:
> That said, I believe there are currently reasons, until you can use
> a procfs call to adopt a copy-on-write region as a non-copy-on-write
so we need to have a way for procfs to list all the file descriptors
that are owned by the process so that you can mmap them
MAP_{SHARED,PRIVATE} to their hearts content?
> region in another process (ie: copy the pages if they are /dev/zero
> pages, but share them otherwise), that SYSV SHMEM is actually a
> better (in terms of performance) technology.
what's wrong with a unix domain socket and passing the file descriptor
through the socket?
--
John-Mark Gurney Modem Rev/FAX: +1 541 346 9237
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