https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206112
Bug ID: 206112
Summary: [rtwn] Under heavy load, "can't map mbuf (error 12)"
arises
Product: Base System
Version: 11.0-CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: wireless
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
CC: [email protected]
Hi,
I'm testing the rtwn module and under heavy usage (e.g. video streaming) or a
high number of active connections (e.g. multiple browser tabs or P2P), the
interface stops responding in a few minutes and the following message spams
multiple times on the system message buffer.
rtwn0: can't map mbuf (error: 12)
where 12 I assume it's the error number of ENOMEM.
ifconfig wlan0 down and ifconfig wlan0 up does not reset the interface and the
card still not respond. A full reboot of the machine fixes it.
When those messages appear, trying to resume the stream from the application
issues a kernel panic while trying to unload the module results in a machine
freeze.
I'll take the crash dump, if it's necessary.
With light usage, I can't get the issue.
(I don't know if this relates to the performance issue I have with the module.
The speed seems capped to around 1/3 rather than the full 54mbps rate I got
using the ndis wrapper. I'm opening a separate bug report for that.)
Which information are needed?
Thanks,
Simone
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