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>
next in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199907071843.LAA92954>