> From: Van Haaren, Harry > Sent: Tuesday, February 23, 2016 2:10 PM > To: david.marchand at 6wind.com > Cc: Tahhan, Maryam <maryam.tahhan at intel.com>; dev at dpdk.org; Van > Haaren, Harry <harry.van.haaren at intel.com> > Subject: [PATCH v4] eal: add function to check if primary proc alive > > This patch adds a new function to the EAL API: > int rte_eal_primary_proc_alive(const char *path); > > The function indicates if a primary process is alive right now. > This functionality is implemented by testing for a write- lock on the > config file, and the function tests for a lock. > > The use case for this functionality is that a secondary process can wait > until a primary process starts by polling the function and waiting. When > the primary is running, the secondary continues to poll to detect if the > primary process has quit unexpectedly, the secondary process can detect > this. > > The RTE_MAGIC number is written to the shared config by the primary > process, this is the signal to the secondary process that the EAL is set up, > and ready to be used. The function > rte_eal_mcfg_complete() writes RTE_MAGIC. This has been delayed in > the EAL init proceedure, as the PCI probing in the primary process can > interfere with the secondary running. > > Signed-off-by: Harry van Haaren <harry.van.haaren at intel.com>
Acked-by: Maryam Tahhan <maryam.tahhan at intel.com>
