Date: Wed, 7 Jul 1999 11:43:44 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: freebsd-hackers@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Heh heh, humorous lockup Message-ID: <199907071843.LAA92954@apollo.backplane.com>
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Ok, but for a kernel hacker this *should* be funny. My system locked up because it had too much memory. Specifically, there is a contrived limit to the size of the kernel malloc pool of 40MB, and 80MB for the entire pool based on VM_KMEM_SIZE_MAX. Unfortunately, if you have a lot of memory the vnode cache can actually wind up *using* 40MB, because the system isn't throwing away active VM objects and so isn't throwing away vnodes. Result: lockup. Since we have increased the hard page table allocation for the kernel to 1G (?) we should be able to safely increase VM_KMEM_SIZE_MAX. I was thinking of increasing it to 512MB. This increase only effects large-memory systems. It keeps them from locking up :-) Anyone have any objections? -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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