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3 Commits

Author SHA1 Message Date
kib
bdf946f966 Lock pshared_lock shared around fork, to ensure that the COW snapshot 
of the pshared hash in child is consistent and can be safely used.

Reported and tested by:	"Oleg V. Nauman" <oleg@opentransfer.com>
Sponsored by:	The FreeBSD Foundation
 2016-03-21 06:52:35 +00:00
kib
ac7a1d6753 Add two comments explaining the fine points of the hash 
implementation.

Reviewed by:	emaste
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D5490
 2016-03-01 15:21:01 +00:00
kib
e76eb4255b Implement process-shared locks support for libthr.so.3, without 
breaking the ABI.  Special value is stored in the lock pointer to
indicate shared lock, and offline page in the shared memory is
allocated to store the actual lock.

Reviewed by:	vangyzen (previous version)
Discussed with:	deischen, emaste, jhb, rwatson,
	Martin Simmons <martin@lispworks.com>
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
 2016-02-28 17:52:33 +00:00