concurrent CTL

The functions pthread_rwlock_timedwrlock() and pthread_rwlock_timedrdlock()
are not available on macOS. Use not non-timed variants pthread_rwlock_wrlock()
and pthread_rwlock_rdlock() instead.

Libor Peltan authored 9 months ago and Daniel Salzman committed 7 months ago

...to avoid LMDB issues when RW txn migrates threads

Libor Peltan authored 9 months ago and Daniel Salzman committed 7 months ago

If a command called with -b would be started and knotc zone-begin
arrived in the meantime before the first command reaches zone_update_begin(),
it might be blocked until zone-abort, which might however not be possible
to send because ctl is blocked due to -b.

Libor Peltan authored 9 months ago and Daniel Salzman committed 7 months ago

knotc zone-ksk-submitted actually triggers two operations:
1) modification of KSK's metadata
2) re-signing of the zone when called in multithreaded CTL, it might happen
   that knotc zone-begin arrives between those and if a third comand needs
   to lock it all, it could cause deadlock