Date: Fri, 20 Jun 2003 19:47:45 +0900 From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> To: Doug Rabson <dfr@nlsystems.com> Cc: cvs-src@FreeBSD.org Subject: Re: cvs commit: src/sys/amd64/amd64 pmap.c Message-ID: <ybsr85pqb3i.wl@ett.sat.t.u-tokyo.ac.jp> In-Reply-To: <200306201002.24956.dfr@nlsystems.com> References: <200306191214.h5JCEcjg028827@repoman.freebsd.org> <20030619190204.B74362A7EA@canning.wemm.org> <ybs1xxpsj4n.wl@ett.sat.t.u-tokyo.ac.jp> <200306201002.24956.dfr@nlsystems.com>
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At Fri, 20 Jun 2003 10:02:24 +0100, Doug Rabson wrote: > > On Friday 20 June 2003 1:11 am, Hidetoshi Shimokawa wrote: > > At Thu, 19 Jun 2003 12:02:04 -0700, > > > > Peter Wemm wrote: > > > > Modified files: > > > > sys/amd64/amd64 pmap.c > > > > Log: > > > > Fix direct map page table for 2GB+ physical memory. > > > > > > Thank you! :-) > > > > > > Cheers, > > > -Peter > > > > Do you have any plan to increase KVA up to 512GB? > > struct vm_page consumes 250MB space for 8GB memory. > > Is there a direct-mapped region on amd64? The vm_page arrays come out of > the direct-mapped regions on alpha and ia64 (don't know about sparc64) > and this makes a big difference to KVA usage and probably to TLB > pressure too. It makes sense. Amd64 has direct-mapped region on -1TB space. I'll look into the code of alpha/ia64. Thanks, /\ Hidetoshi Shimokawa \/ simokawa@sat.t.u-tokyo.ac.jp PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
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