Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262049AbUKKHHv (ORCPT ); Thu, 11 Nov 2004 02:07:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262178AbUKKHHv (ORCPT ); Thu, 11 Nov 2004 02:07:51 -0500 Received: from mail.gmx.net ([213.165.64.20]:36327 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262049AbUKKHHW (ORCPT ); Thu, 11 Nov 2004 02:07:22 -0500 X-Authenticated: #4512188 Message-ID: <41930F9C.8010308@gmx.de> Date: Thu, 11 Nov 2004 08:07:08 +0100 From: "Prakash K. Cheemplavam" User-Agent: Mozilla Thunderbird 0.9 (X11/20041109) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Bill Davidsen CC: linux-kernel@vger.kernel.org Subject: Re: [2.6.10-rc1 and prev] System unuseable while writing to disk References: <418FE968.4030300@gmx.de> <41927019.9050508@tmr.com> In-Reply-To: <41927019.9050508@tmr.com> 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="------------enig17DB99036B57750AE4A3F6E1" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8958 Lines: 197 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig17DB99036B57750AE4A3F6E1 Content-Type: multipart/mixed; boundary="------------020001050303090208000800" This is a multi-part message in MIME format. --------------020001050303090208000800 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Bill Davidsen wrote: > Prakash K. Cheemplavam wrote: > >> Hi, >> >> I have a problem which doesn't seem to be connected to the i/o >> schedulers, because all I tested (cfq, deadline, noop) show the same: >> >> While writing (when the kernel actually commits to hd) my system gets >> very unresponsive esp when another app I want to use wants to write >> (read?) from hd, as well. This is *not* a UDMA problem (at least no >> apparent...)! More specific: >> >> I wrote this primitive code for writing sequentially: > > > May I suggest running "vmstat 1" while this is happening? Looking at the > waitio time vs. transfer rates might reveal something. If it all looks Here you go. I hope you can see anything. (I attached the file as well...): procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 775044 14520 136460 0 0 935 86 1251 909 13 5 57 25 0 0 0 775036 14520 136460 0 0 0 0 1270 536 1 0 99 0 0 0 0 775036 14520 136460 0 0 0 0 1225 655 1 1 98 0 0 0 0 775036 14520 136460 0 0 0 0 1187 530 1 0 99 0 0 0 0 775036 14520 136460 0 0 0 0 1184 517 0 0 100 0 0 0 0 775036 14520 136460 0 0 0 0 1188 548 1 1 98 0 0 0 0 774876 14532 136460 0 0 12 0 1185 681 2 1 94 3 0 0 0 774876 14532 136460 0 0 0 0 1185 479 0 0 100 0 0 0 0 774876 14532 136460 0 0 0 0 1180 436 1 0 99 0 1 1 0 571740 14732 333736 0 0 32 42628 1325 633 3 43 52 2 2 2 0 217812 15072 676648 0 0 0 45184 1523 1771 14 78 0 8 1 2 0 220436 15072 676648 0 0 0 49664 1582 1365 9 6 0 85 0 2 0 85460 15984 808012 0 0 164 73984 1487 1143 18 32 0 49 0 1 0 85716 15984 808140 0 0 0 29056 1493 1381 4 6 0 90 0 1 0 86100 15984 808140 0 0 0 40320 1420 1367 3 2 0 95 0 1 0 86100 15984 808140 0 0 0 44416 1386 693 0 2 0 98 0 1 0 86100 15984 808140 0 0 0 50304 1518 1413 5 6 0 89 0 1 0 86164 15984 808140 0 0 0 28544 1452 827 1 2 0 97 0 1 0 86292 15984 808140 0 0 0 35840 1386 809 1 2 0 97 0 1 0 86356 15984 808140 0 0 0 37376 1450 1373 3 3 0 94 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 86484 15984 808140 0 0 0 42880 1752 2494 7 6 0 87 0 1 0 86484 15984 808140 0 0 0 31872 1608 2098 7 4 0 89 0 1 0 86484 15984 808140 0 0 0 45952 1530 795 1 2 0 97 0 1 0 86484 15984 808140 0 0 0 44288 1515 814 0 3 0 97 0 1 0 90580 15984 808140 0 0 0 29052 1471 1365 5 5 0 90 1 0 0 90148 16108 809356 0 0 976 2088 1383 1319 22 11 0 67 0 0 0 90148 16108 809360 0 0 4 16 1444 833 10 5 84 1 0 0 0 90148 16108 809360 0 0 0 0 1256 473 0 0 100 0 0 0 0 90148 16108 809360 0 0 0 0 1379 611 3 1 96 0 0 0 0 90148 16108 809360 0 0 0 0 1526 2439 16 5 79 0 0 0 0 90148 16164 809360 0 0 0 120 1563 1824 16 4 80 0 Beginning and end the system is idle and then I start writing down the file. During that time thunderbird gets unusable. > I can't say that I see any such thing with ext[23], so it may be a > reiser issue and someone else will have to help. Did you look at the > logs to see that there are no useful warnings there? Nothing in the logs, unfortunately. 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