Date: Fri, 15 Oct 2010 03:23:53 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/amd64/amd64 cpu_switch.S pmap.c src/sys/i386/i386 pmap.c Message-ID: <201010150324.o9F3OHNY075013@repoman.freebsd.org>
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alc 2010-10-15 03:23:53 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_8)
sys/amd64/amd64 cpu_switch.S pmap.c
sys/i386/i386 pmap.c
Log:
SVN rev 213887 on 2010-10-15 03:23:53Z by alc
MFC r209789
Correctly maintain the per-cpu field "curpmap" on amd64 just like we
do on i386. The consequences of not doing so on amd64 became apparent
with the introduction of the COUNT_IPIS and COUNT_XINVLTLB_HITS
options. Specifically, single-threaded applications were generating
unnecessary IPIs to shoot-down the TLB on other processors.
MFC r209887
Reduce the number of global TLB shootdowns generated by pmap_qenter().
Specifically, teach pmap_qenter() to recognize the case when it is being
asked to replace a mapping with the very same mapping and not generate
a shootdown.
Revision Changes Path
1.169.2.3 +10 -12 src/sys/amd64/amd64/cpu_switch.S
1.667.2.13 +11 -6 src/sys/amd64/amd64/pmap.c
1.645.2.16 +9 -6 src/sys/i386/i386/pmap.c
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