From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Schlichter Subject: Re: 2.5.60-mm2 Date: Fri, 14 Feb 2003 11:10:41 +0100 References: <20030214013144.2d94a9c5.akpm@digeo.com> <20030214093856.GC13845@codemonkey.org.uk> In-Reply-To: <20030214093856.GC13845@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Boundary-02=_pCMT+DYGeShQy4x"; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200302141110.49348.schlicht@uni-mannheim.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Dave Jones , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: --Boundary-02=_pCMT+DYGeShQy4x Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Description: signed data Content-Disposition: inline On Friday, 14. February 2003 10:38, Dave Jones wrote: > On Fri, Feb 14, 2003 at 01:31:44AM -0800, Andrew Morton wrote: > > . Considerable poking at the NFS MAP_SHARED OOM lockup. It is limping > > along now, but writeout bandwidth is poor and it is still struggling. > > Needs work. > > > > . There's a one-liner which removes an O(n^2) search in the NFS > > writeback path. It increases writeout bandwidth by 4x and decreases C= PU > > load from 100% to 3%. Needs work. > > I'm puzzled that you've had NFS stable enough to test these. > How much testing has this stuff had? Here 2.5.60+bk clients fall over und= er > moderate NFS load. (And go splat quickly under high load). > > Trying to run things like dbench causes lockups, fsx/fstress made it > reboot, plus the odd 'cheating' errors reported yesterday. > > Dave I've got NFS problems with 2.5.5x - 60-bk3, too, but here I can workaround= =20 them by simply pinging the NFS-server every second... Funny, but it works! Perhaps this can help finding the real bug?! Thomas --Boundary-02=_pCMT+DYGeShQy4x Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQA+TMCpYAiN+WRIZzQRAkV8AJwKY8v7t1jvBMFbyNXaFt1c5QzKbQCdFcXB /KQsXPQPTki+B5HzH3QsQZc= =PNko -----END PGP SIGNATURE----- --Boundary-02=_pCMT+DYGeShQy4x-- -- 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: aart@kvack.org