Date: Sun, 7 Sep 2003 19:45:03 -0700 (PDT) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha pmap.c src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c src/sys/ia64/ia64 pmap.c src/sys/sparc64/sparc64 pmap.c src/sys/vm pmap.h Message-ID: <200309080245.h882j3YH012382@repoman.freebsd.org>
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alc 2003/09/07 19:45:03 PDT
FreeBSD src repository
Modified files:
sys/alpha/alpha pmap.c
sys/amd64/amd64 pmap.c
sys/i386/i386 pmap.c
sys/ia64/ia64 pmap.c
sys/sparc64/sparc64 pmap.c
sys/vm pmap.h
Log:
Introduce a new pmap function, pmap_extract_and_hold(). This function
atomically extracts and holds the physical page that is associated with the
given pmap and virtual address. Such a function is needed to make the
memory mapping optimizations used by, for example, pipes and raw disk I/O
MP-safe.
Reviewed by: tegge
Revision Changes Path
1.137 +23 -0 src/sys/alpha/alpha/pmap.c
1.435 +24 -0 src/sys/amd64/amd64/pmap.c
1.431 +24 -0 src/sys/i386/i386/pmap.c
1.120 +24 -0 src/sys/ia64/ia64/pmap.c
1.122 +22 -0 src/sys/sparc64/sparc64/pmap.c
1.62 +1 -0 src/sys/vm/pmap.h
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