Date: Tue, 25 Jan 2011 19:44:55 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/vm vm_map.c vm_map.h Message-ID: <201101251945.p0PJj8Gi040502@repoman.freebsd.org>
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jhb 2011-01-25 19:44:55 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/vm vm_map.c vm_map.h
Log:
SVN rev 217836 on 2011-01-25 19:44:55Z by jhb
MFC 214144:
- Make 'vm_refcnt' volatile so that compilers won't be tempted to treat
its value as a loop invariant. Currently this is a no-op because
'atomic_cmpset_int()' clobbers all memory on current architectures.
- Use atomic_fetchadd_int() instead of an atomic_cmpset_int() loop to drop
a reference in vmspace_free().
Revision Changes Path
1.388.2.15 +1 -5 src/sys/vm/vm_map.c
1.120.2.4 +1 -1 src/sys/vm/vm_map.h
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