Date: Thu, 03 Jul 2003 15:26:23 -0500 From: "Alan L. Cox" <alc@imimic.com> To: sparc64@freebsd.org Subject: [Fwd: cvs commit: src/sys/alpha/alpha pmap.c src/sys/amd64/amd64 pmap.csrc/sys/i386/i386 pmap.c src/sys/ia64/ia64 pmap.csrc/sys/powerpc/powerpc pmap.c src/sys/sparc] Message-ID: <3F04916F.12364D33@imimic.com>
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This should improve the performance of apps using memory-mapped files on
sparc64. If, however, you see anything "weird" happening, you can
effectively disable this change on sparc64 by #if 0'ing the body of
sparc64's one-line pmap_enter_quick().
Regards,
Alan
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From: Alan Cox <alc@FreeBSD.org>
Date: Thu, 3 Jul 2003 13:18:02 -0700 (PDT)
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/powerpc/powerpc pmap.c src/sys/sparc64/sparc64 pmap.c
src/sys/vm pmap.h vm_map.c
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alc 2003/07/03 13:18:02 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/powerpc/powerpc pmap.c
sys/sparc64/sparc64 pmap.c
sys/vm pmap.h vm_map.c
Log:
Background: pmap_object_init_pt() premaps the pages of a object in
order to avoid the overhead of later page faults. In general, it
implements two cases: one for vnode-backed objects and one for
device-backed objects. Only the device-backed case is really
machine-dependent, belonging in the pmap.
This commit moves the vnode-backed case into the (relatively) new
function vm_map_pmap_enter(). On amd64 and i386, this commit only
amounts to code rearrangement. On alpha and ia64, the new machine
independent (MI) implementation of the vnode case is smaller and more
efficient than their pmap-based implementations. (The MI
implementation takes advantage of the fact that objects in -CURRENT
are ordered collections of pages.) On sparc64, pmap_object_init_pt()
hadn't (yet) been implemented.
Revision Changes Path
1.129 +4 -105 src/sys/alpha/alpha/pmap.c
1.419 +15 -83 src/sys/amd64/amd64/pmap.c
1.415 +15 -84 src/sys/i386/i386/pmap.c
1.114 +4 -106 src/sys/ia64/ia64/pmap.c
1.59 +5 -3 src/sys/powerpc/powerpc/pmap.c
1.117 +5 -2 src/sys/sparc64/sparc64/pmap.c
1.61 +1 -2 src/sys/vm/pmap.h
1.303 +74 -1 src/sys/vm/vm_map.c
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