From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262119AbULCJfD (ORCPT ); Fri, 3 Dec 2004 04:35:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262125AbULCJfD (ORCPT ); Fri, 3 Dec 2004 04:35:03 -0500 Received: from mail.gmx.de ([213.165.64.20]:47513 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262119AbULCJeu (ORCPT ); Fri, 3 Dec 2004 04:34:50 -0500 X-Authenticated: #4512188 Message-ID: <41B03337.5090408@gmx.de> Date: Fri, 03 Dec 2004 10:34:47 +0100 From: "Prakash K. Cheemplavam" User-Agent: Mozilla Thunderbird 0.9 (X11/20041114) X-Accept-Language: de-DE, de, en-us, en MIME-Version: 1.0 To: Andrew Morton CC: axboe@suse.de, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au Subject: Re: Time sliced CFQ io scheduler References: <20041202130457.GC10458@suse.de> <20041202134801.GE10458@suse.de> <20041202114836.6b2e8d3f.akpm@osdl.org> <20041202195232.GA26695@suse.de> <20041202121938.12a9e5e0.akpm@osdl.org> <41AF94B8.8030202@gmx.de> <20041203070108.GA10492@suse.de> <41B02DFD.9090503@gmx.de> <20041203012645.21377669.akpm@osdl.org> In-Reply-To: <20041203012645.21377669.akpm@osdl.org> X-Enigmail-Version: 0.89.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigCAF226BFECE58BA6FBB562D3" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigCAF226BFECE58BA6FBB562D3 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Andrew Morton schrieb: > "Prakash K. Cheemplavam" wrote: > >>>Can you try with the patch that is in the parent of this thread? The >> >> > above doesn't look that bad, although read performance could be better >> > of course. But try with the patch please, I'm sure it should help you >> > quite a lot. >> > >> >> It actually got worse: Though the read rate seems accepteble, it is not, as >> interactivity is dead while writing. > > > Is this a parallel IDE system? SATA? SCSI? If the latter, what driver > and what is the TCQ depth? Hmm yes, this is a RAID0 configuration, so the regression of time slieced CFQ might me related to it, but the problem of unresponsiveness while writing as such was on my single disk, as well. Here one HD is SATA (libata silicon image) and one on IDE controller (nforce2). No TCQ. BTW, I haven't checked the problem on my ide disk only on SATA. Wil try to free some space and do so... Prakash --------------enigCAF226BFECE58BA6FBB562D3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFBsDM3xU2n/+9+t5gRAh6mAKDVLBkKuqsJUkHzBT51fVWylkcV/wCfSuUH q5a4mqZp288Ak1szIZrgD9k= =Fclg -----END PGP SIGNATURE----- --------------enigCAF226BFECE58BA6FBB562D3--