Date: Tue, 7 Mar 2006 16:28:19 -0500 (EST) From: rick@snowhite.cis.uoguelph.ca To: freebsd-current@freebsd.org Subject: kernel mget limit Message-ID: <200603072128.QAA75476@snowhite.cis.uoguelph.ca>
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I've been trying to figure out how I can check to see if resources for
kernel malloc() and mget() are nearing (but not at) their allocation
limit. Wading around in the vm sources, I haven't figured out much.
The following snippet of code is all I've come up with. (It looks like
uz_allocs might also be useful, but I have no idea what upper bound
would make sense, if any.)
if ((zone_mbuf->uz_keg->uk_maxpages > 0 &&
(zone_mbuf->uz_keg->uk_pages + zone_mbuf->uz_keg->uk_pages/10) >=
zone_mbuf->uz_keg->uk_maxpages) ||
(zone_clust->uz_keg->uk_maxpages > 0 &&
(zone_clust->uz_keg->uk_pages+zone_clust->uz_keg->uk_pages/10) >=
zone_clust->uz_keg->uk_maxpages)) {
- Allocation near limit for mbufs/clusters
This would be useful, so that my NFSv4 server knows when to return
NFS4ERR_RESOURCE.
Any help with this would be appreciated. Thanks, rick
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