On 03/15/12 17:18, Alan Cox wrote:
On 3/15/2012 2:36 PM, Nathan Whitehorn wrote:
Author: nwhitehorn
Date: Thu Mar 15 19:36:52 2012
New Revision: 233011
URL: http://svn.freebsd.org/changeset/base/233011
Log:
Improve algorithm for deciding whether to loop through all process
pages
or look them up individually in pmap_remove() and apply the same
logic
in the other ranged operation (pmap_protect). This speeds up make
installworld by a factor of 2 on powerpc64.
MFC after: 1 week
Modified:
head/sys/powerpc/aim/mmu_oea64.c
As an additional, related optimization, you should look into
implementing pmap_remove_pages().
Alan
Thanks! I didn't know about that one. Is there a reason it isn't called
at the end of vm_pageout_map_deactivate_pages(), which seems to
deactivate all pages with pmap_remove()?
-Nathan
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