Re: [LMDB] Lockups with robust mutexes and crashing processes

Marcos-David Dione wrote:

"openldap-devel" openldap-devel-bounces@openldap.org wrote on 25/11/2014 16:19:40:

...

Fyi, this would not have been a bug in Solaris:

https://docs.oracle.com/cd/E19253-01/816-5168/pthread-mutexattr- setrobust-np-3c/index.html

     you mean, because of the phrase «When the owner of a mutex with

the PTHREAD_MUTEX_ROBUST_NP /robustness/ attribute dies, or when the process containing such a locked mutex unmaps the memory containing the mutex or performs one of the _exec(2)_ https://docs.oracle.com/docs/cd/E19253-01/816-5167/exec-2/index.htmlfunctions, the mutex is unlocked.»? I'm not sure that when it says 'unmap' it means 'munmap()s'.

There is no other meaning of the word. A process-shared mutex must reside in shared memory. When a process detaches from that shared memory, it is unmapped.