Date: Thu, 21 Oct 2010 17:29:32 +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: <201010211729.o9LHTmN7004387@repoman.freebsd.org>
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jhb 2010-10-21 17:29:32 UTC
FreeBSD src repository
Modified files:
sys/vm vm_map.c vm_map.h
Log:
SVN rev 214144 on 2010-10-21 17:29:32Z by jhb
- 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().
Reviewed by: alc
MFC after: 1 month
Revision Changes Path
1.435 +1 -5 src/sys/vm/vm_map.c
1.137 +1 -1 src/sys/vm/vm_map.h
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