From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: -mm merge plans for 2.6.23 From: Zan Lynx In-Reply-To: <20070725150509.4d80a85e.pj@sgi.com> References: <46A58B49.3050508@yahoo.com.au> <2c0942db0707240915h56e007e3l9110e24a065f2e73@mail.gmail.com> <46A6CC56.6040307@yahoo.com.au> <46A6D7D2.4050708@gmail.com> <46A6DFFD.9030202@gmail.com> <30701.1185347660@turing-police.cc.vt.edu> <46A7074B.50608@gmail.com> <20070725082822.GA13098@elte.hu> <46A70D37.3060005@gmail.com> <20070725113401.GA23341@elte.hu> <20070725150509.4d80a85e.pj@sgi.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-IBxGqHANLpnHXsRehCQK" Date: Wed, 25 Jul 2007 16:22:12 -0600 Message-Id: <1185402132.9409.21.camel@localhost> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org Return-Path: To: Paul Jackson Cc: Ingo Molnar , rene.herman@gmail.com, Valdis.Kletnieks@vt.edu, david@lang.hm, nickpiggin@yahoo.com.au, ray-lk@madrabbit.org, jesper.juhl@gmail.com, akpm@linux-foundation.org, ck@vds.kolivas.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: --=-IBxGqHANLpnHXsRehCQK Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2007-07-25 at 15:05 -0700, Paul Jackson wrote: [snip] > Question: > Could those who have found this prefetch helps them alot say how > many disks they have? In particular, is their swap on the same > disk spindle as their root and user files? >=20 > Answer - for me: > On my system where updatedb is a big problem, I have one, slow, disk. > On my system where updatedb is a small problem, swap is on a separate > spindle. > On my system where updatedb is -no- problem, I have so much memory > I never use swap. >=20 > I'd expect the laptop crowd to mostly have a single, slow, disk, and > hence to find updatedb more painful. A well done swap-to-flash would help here. I sometimes do it anyway to a 4GB CF card but I can tell it's hitting the read/update/write cycles on the flash blocks. The sad thing is that it is still a speed improvement over swapping to laptop disk. --=20 Zan Lynx --=-IBxGqHANLpnHXsRehCQK Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.5 (GNU/Linux) iD8DBQBGp80UG8fHaOLTWwgRAoDzAJ9TmBn/QvPI6JZs6QbqHtyTZoohoACfX/aw LrxpMh3c7H/9bkv0t9pzsNw= =FL34 -----END PGP SIGNATURE----- --=-IBxGqHANLpnHXsRehCQK-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org