Date: Wed, 17 May 2006 11:37:49 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Max Khon <fjoe@samodelkin.net> Cc: Stephen Frost <sfrost@snowman.net>, freebsd-stable@FreeBSD.org, pgsql-hackers@postgresql.org, "Marc G. Fournier" <scrappy@postgresql.org>, Kris Kennaway <kris@obsecurity.org>, Tom Lane <tgl@sss.pgh.pa.us> Subject: Re: [HACKERS] semaphore usage "port based"? Message-ID: <20060517113507.W49041@fledge.watson.org> In-Reply-To: <20060509111924.GD64148@samodelkin.net> References: <27148.1144030940@sss.pgh.pa.us> <20060402232832.M947@ganymede.hub.org> <20060402234459.Y947@ganymede.hub.org> <27417.1144033691@sss.pgh.pa.us> <20060403164139.D36756@fledge.watson.org> <14654.1144082224@sss.pgh.pa.us> <20060403194251.GF4474@ns.snowman.net> <20060403233540.D76562@fledge.watson.org> <20060403225145.GI4474@ns.snowman.net> <20060403235222.W76562@fledge.watson.org> <20060509111924.GD64148@samodelkin.net>
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On Tue, 9 May 2006, Max Khon wrote: >> Yes, there seems to be an awful lot of noise being made about the fact that >> the system does, in fact, work exactly as documented, and that the >> configuration being complained about is one that is specifically documented >> as being unsupported and undesirable. >> >> As commented elsewhere in this thread, currently, there is no >> virtualization support for System V IPC in the FreeBSD Jail implementation. >> That may change if/when someone implements it. Until it's implemented, it >> isn't going to be there, and the system won't behave as though it's there >> no matter how much jumping up and down is done. > > sysvipc has been implemented once, but it has been decided that it adds > unnecessary bloat. That's sad. I'm not sure I follow the reasoning behind this statement. Could you direct me to the implementation, and at the specific claim that it adds unnecessary bloat? As far as I know, no implementation of jail support for system v ipc has ever been rejected on the basis that it adds bloat -- all discussion about it has centered on the fact that it is, in fact, a very difficult technical problem to solve, which requires careful consideration of the approach and tradeoffs, and that that careful consideration has not yet bene done. Robert N M Watson
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