panic: kmem_malloc

Lukas Ertl l.ertl at
Thu Jul 10 10:46:03 PDT 2003


we are currently stress-testing two 5.1 machines. Each of the machines
have a 2.6GHz P4 and 512 MB RAM. The machines are running zebra, ospfd and
nscd. We bomb the machines with many DNS requests (up to 50k/s),
transmitted over Gigabit Ethernet.

Unfortunately, both machines panic soon after starting the tests, and both
go down with "kmem_malloc(4096): kmem_map too small" and says the current
process is "4 (g_down)". I'd love to present a coredump and a backtrace,
but somehow it just doesn't dump, it rather panics again with
"ata_dmasetup: transfer active".

Well, if I get this right, it means that the kernel VM is exhausted. Is
there anything I can do apart from using more RAM?


Lukas Ertl                             eMail: l.ertl at
UNIX-Systemadministrator               Tel.:  (+43 1) 4277-14073
Zentraler Informatikdienst (ZID)       Fax.:  (+43 1) 4277-9140
der Universität Wien         

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