Date: Sun, 07 Jul 2002 23:28:54 -0700 From: Peter Wemm <peter@wemm.org> To: current@freebsd.org Subject: Remember my ill-fated i386 smp pmap optimizations? Message-ID: <20020708062855.02DE03808@overcee.wemm.org>
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A few months ago, I had a bit of a disaster with some pmap optimizations.
After committing, all hell broke loose. It was backed out completely.
I finally found the problem (diff cleaned up to highlight the problem):
pmap_mapdev()
...
for (tmpva = va; size > 0; ) {
pte = vtopte(tmpva);
*pte = pa | PG_RW | PG_V | pgeflag;
size -= PAGE_SIZE;
tmpva += PAGE_SIZE;
- pa += PAGE_SIZE;
}
invltlb();
Excuse me while I go outside and shoot myself.
Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5
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