Re: Darwin 5.4 xnu kernel CVS Release Tags and SHMMAX
Re: Darwin 5.4 xnu kernel CVS Release Tags and SHMMAX
- Subject: Re: Darwin 5.4 xnu kernel CVS Release Tags and SHMMAX
- From: "Ethan Clark" <email@hidden>
- Date: Wed, 22 May 2002 19:56:41 -0700
Mr. Worsley,
If I'm not mistaken, you need Apple-201-19-3 to get version 5.4, though I do
not profess to be an expert in this arena, and could thus be completely
wrong ^_^
Ethan Clark
----- Original Message -----
From: "John Worsley" <email@hidden>
To: <email@hidden>
Sent: Wednesday, May 22, 2002 5:19 PM
Subject: Darwin 5.4 xnu kernel CVS Release Tags and SHMMAX
>
Greetings,
>
>
I work for a company producing a commercial distribution of PostgreSQL, an
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open-source RDBMS. I've found that building it for OS X running the Darwin
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Kernel produces an error suggesting the Kernel be re-configured to have a
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higher value for SHMMAX when the requested concurrent connection value is
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too high.
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I've read up on the Darwin HOWTOs, and I've checked out xnu release
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Apple-201-19 from Apple's public CVS server, and I have two questions.
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1. The Kernel Version appears to be 5.3, but the Kernel on my iMac running
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10.1.4 of OS X reports Darwin Kernel version 5.4...just poking around I
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don't see any log or diff on the version.minor file in xnu/bsd/conf/ with
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a value of 4, and browsing the list of Release Tags didn't help much.
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So: is the version of the Darwin Kernel used with MacOS 10.1.4 (5.4) not
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available via Darwin CVS? The current snapshot reveals work on Kernel 6.0,
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which I'm pretty sure is inappropriate for my needs. ;) If it is
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available, what is the Release Tag?
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2. I've found the SHMMAX parameter in xnu/bsd/conf/param.c, lines 98-101,
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and I found the following:
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#define SHMMAXPGS 1024 /* XXX until we have more kmap
space */
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#ifndef SHMMAX
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#define SHMMAX (SHMMAXPGS * 4096)
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Increasing the SHMMAXPGS value arbitrarily by a factor of 16 seemed to
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solve my problem, as far as the RDBMS software goes, but does anyone have
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an opinion on what effect, if any, this would have on the rest of the
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system? I'm a little leery of the "until we have more kmap space" warning
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since I have no idea to what it refers. ;)
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>
Any information on either of these topics would be duly appreciated.
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Best regards,
>
Jw.
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--
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John Worsley - Lead Programmer / Web Developer, Command Prompt, Inc.
>
TheLinuxReview | Resources for Linux Users |
http://www.thelinuxreview.com/
>
(503) 736-4609 | email@hidden | email@hidden
>
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