Date: Thu, 15 Mar 2012 17:55:56 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Alan Cox <alc@rice.edu> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r233011 - head/sys/powerpc/aim Message-ID: <4F62737C.7060100@freebsd.org> In-Reply-To: <4F626AB8.3090509@rice.edu> References: <201203151936.q2FJaqTr080483@svn.freebsd.org> <4F626AB8.3090509@rice.edu>
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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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