Amaury Denoyelle 25174d51ef MEDIUM: quic: implement thread affinity rebinding ... Implement a new function qc_set_tid_affinity(). This function is responsible to rebind a quic_conn instance to a new thread. This operation consists mostly of releasing existing tasks and tasklet and allocating new instances on the new thread. If the quic_conn uses its owned socket, it is also migrated to the new thread. The migration is finally completed with updated the CID TID to the new thread. After this step, the connection is thus accessible to the new thread and cannot be access anymore on the old one without risking race condition. To ensure rebinding is either done completely or not at all, tasks and tasklet are pre-allocated before all operations. If this fails, an error is returned and rebiding is not done. To destroy the older tasklet, its context is set to NULL before wake up. In I/O callbacks, a new function qc_process() is used to check context and free the tasklet if NULL. The thread rebinding can cause a race condition if the older thread quic_dghdlrs::dgrams list contains datagram for the connection after rebinding is done. To prevent this, quic_rx_pkt_retrieve_conn() always check if the packet CID is still associated to the current thread or not. In the latter case, no connection is returned and the new thread is returned to allow to redispatch the datagram to the new thread in a thread-safe way. This should be backported up to 2.7 after a period of observation.		2023-04-18 17:08:34 +02:00
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haproxy	MEDIUM: quic: implement thread affinity rebinding	2023-04-18 17:08:34 +02:00
import	CLEANUP: assorted typo fixes in the code and comments	2022-11-30 14:02:36 +01:00
make	BUILD: makefile: only consider settings from enabled options	2022-12-23 17:01:55 +01:00