Date: Sun, 3 Oct 2004 20:14:07 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c Message-ID: <200410032014.i93KE7dR001527@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
alc 2004-10-03 20:14:07 UTC
FreeBSD src repository
Modified files:
sys/amd64/amd64 pmap.c
sys/i386/i386 pmap.c
Log:
Undo revision 1.251. This change was a performance pessimizing work-around
that is no longer required. (In fact, it is not clear that it was ever
required in HEAD or RELENG_4, only RELENG_3 required a work-around.) Now,
as before revision 1.251, if the preexisting PTE is invalid, pmap_enter()
does not call pmap_invalidate_page() to update the TLB(s).
Note: Even with this change, the handling of a copy-on-write fault is
inefficient, in such cases pmap_enter() calls pmap_invalidate_page() twice.
Discussed with: bde@
PR: kern/16568
Revision Changes Path
1.507 +1 -1 src/sys/amd64/amd64/pmap.c
1.512 +1 -1 src/sys/i386/i386/pmap.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200410032014.i93KE7dR001527>