Bug 662

Summary:	Pthread_mutex usage is not safe between primar/secondary process
Product:	DPDK	Reporter:	Stephen Hemminger (stephen)
Component:	core	Assignee:	dev
Status:	UNCONFIRMED ---
Severity:	major	CC:	ajit.khaparde
Priority:	Normal
Version:	18.11
Target Milestone:	---
Hardware:	All
OS:	All

Description Stephen Hemminger 2021-03-15 20:22:28 CET

Posix mutex's are by default private to the process creating them. Several places in DPDK use pthread_mutex to protect resources in a manner that is not safe when used with primary/secondary processes.

This problem was reported against failsafe driver, but it seems to be a wider problem (assumptions in DPDK). Initial report was on 18.11, but these bugs go back to original code in many cases.

Mutexes that are protecting data structures from multi-process model must call pthread_setpshared().