Date: Fri, 15 Jan 1999 18:23:25 -0800 From: "Ronald F. Guilmette" <rfg@monkeys.com> To: Nathan Ahlstrom <nrahlstr@winternet.com> Cc: questions@FreeBSD.ORG Subject: Re: System V Shared memory regions... How big is too big? Message-ID: <3601.916453405@monkeys.com> In-Reply-To: Your message of Fri, 15 Jan 1999 15:56:03 -0600. <19990115155603.C9892@winternet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <19990115155603.C9892@winternet.com>, you wrote: >"Ronald F. Guilmette" <rfg@monkeys.com> wrote: >> >> Is it just me, or is there actually some sort of a limit (perhaps 4MB?) >> on the maximum supported size of a System V style shared memory region >> under FreeBSD 2.2.8? > >You should be able to increase the size of the memory region. There are >some options documented in /sys/i386/conf/LINT. Look there. Are you sure about that? I scrounged around a bit in the kernel sources and found the following in /usr/src/sys/i386/include/vmparam.h: /* * Size of the Shared Memory Pages page table. */ #ifndef SHMMAXPGS #define SHMMAXPGS 1024 /* XXX until we have more kmap space */ #endif The comment would seem to indicate that only 1024 pages are supported. 1024 * 4KB pages == 4MB. -- Ron Guilmette, Roseville, California ---------- E-Scrub Technologies, Inc. -- Deadbolt(tm) Personal E-Mail Filter demo: http://www.e-scrub.com/deadbolt/ -- Wpoison (web harvester poisoning) - demo: http://www.e-scrub.com/wpoison/ "Ping can be used offensively, and it's shipped with every windows CD" -- Steve Atkins To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3601.916453405>