Hello!
I hit a 'panic: malloc: out of space in kmem_map' on a new system when
activating an interface with ifconfig up. This issue existed in 7.3 as
well as now in 7.4.
I can duplicate this panic by typing ifconfig up after 6-7 interfaces
are already up.
Example: When I 'ifconfig ixl3 up' I get a panic, but only after the
existing interfaces: ix0, ix1, mcx0, mcx1, ixl0, ixl1, ixl2
are already up.
Suspicion: I believe this may have something to do with the memory
assigned to queues for network interfaces. I can prevent this situation
by booting bsd.sp, or reducing the core count in the BIOS from 16 down
to 8. In both cases, the only suspicious change I see in the dmesg is
the reduction of queues on the interface:
Example:
ix0 at pci10 dev 0 function 0 "Intel X550T" ... 16 queues ...
(16 cores)
vs
ix0 at pci10 dev 0 function 0 "Intel X550T" ... 8 queues ...
(8 cores)
And with less queues, the system no longer panics on ifconfig ixl3 up.
Though this may be unrelated.
Full panic details here:
https://www.linkhash.com/e3e3e3e3/openbsd-panic-7.4.tgz
Please let me know what I can do to further help, or if anyone has any
thoughts.
Thank you!
-kvs
