Under certain high load conditions in OpenWrt, using dual-core Laguna products, Ethernet ping latencies could grow to an unacceptable value. After investigation, Gateworks found an SMP race condition as the cause in the CNS3xxx Ethernet driver in Gateworks’ 13-06 and trunk OpenWrt BSPs. Note that the 12-10 OpenWrt BSP is not affected. Gateworks has resolved the issue with upstream patches to OpenWrt:
These fixes have been committed in both the Gateworks 13-06 branch and trunk. Additionally, the prebuilt 13-06 binary firmware images have been updated and they are located here: Laguna Binary Images.
Gateworks recommends all customers using dual-core Laguna products update their firmware.