From: Nikola Ciprich Subject: Re: 2.6.32.2 - WARNING: at lib/kref.c:43 kref_get+0x,23/0x2b() Date: Mon, 22 Feb 2010 06:37:41 +0100 Message-ID: <20100222053741.GE29366@develbox.linuxbox.cz> References: <20100122150325.6ad12428.akpm@linux-foundation.org> <20100127190522.GB18278@fieldses.org> <4B60C5D4.6070000@atmos.washington.edu> <20100202162228.GD4293@fieldses.org> <20100216182248.GA4922@nik-comp.linuxbox.cz> <20100216202121.GE26292@fieldses.org> <20100216202720.GB4922@nik-comp.linuxbox.cz> <20100216202947.GF26292@fieldses.org> <20100217151435.GC30897@develbox.linuxbox.cz> <20100220235105.GB15015@fieldses.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5oH/S/bF6lOfqCQb" Cc: Nikola Ciprich , Harry Edmon , Andrew Morton , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org To: "J. Bruce Fields" Return-path: In-Reply-To: <20100220235105.GB15015@fieldses.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: --5oH/S/bF6lOfqCQb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable It was working pretty well when we were using 2.6.27.x, but after upgrade, I also changed FS from XFS to ext4, (so I can't easily test with 2.6.27 now) = and since then NFS is almost unusable on this machine. But 2.6.27 is pretty old, so there's been a lot of changes. But greg released 2.6.32.9-rc1 which contains bunch of NFS-related fixes, so I'll give it a try and report. nik On Sat, Feb 20, 2010 at 06:51:05PM -0500, J. Bruce Fields wrote: > On Wed, Feb 17, 2010 at 04:14:35PM +0100, Nikola Ciprich wrote: > > Well, > > I did a lot of stress tests, and it seems to be pretty random, and what= 's > > worse, I think it is more then one problem, oh great... > > Seems that at least one of my NFS problems was in fact caused by ext4 r= egression > > (what FS are you using?) > > applying this one: http://bugzilla.kernel.org/attachment.cgi?id=3D24975 > > improved things for me a lot (see http://bugzilla.kernel.org/show_bug.c= gi?id=3D15231 for > > full discussion). > > I'll watch the machine for next few days and report... >=20 > Is there *any* kernel (however old) on which you are confident you can > *not* reproduce the kref bug? >=20 > --b. >=20 > > regards > > nik > >=20 > > On Tue, Feb 16, 2010 at 03:29:47PM -0500, J. Bruce Fields wrote: > > > On Tue, Feb 16, 2010 at 09:27:20PM +0100, Nikola Ciprich wrote: > > > > > Nothing yet. I'm taking another look. > > > > >=20 > > > > > Do you know what the most recent version was where you did *not* = see > > > > > these warnings? > > > > well, actually I decided I'll bisect this one no matter what, so ho= pefully > > > > we'll see soon :) > > > > I'll report > > >=20 > > > That would be fantastic, thanks. What test-case are you using? > > >=20 > > > Any partial information ("xxxx good, xxxx bad") would also be useful. > > >=20 > > > --b. > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-nfs" = in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > >=20 > >=20 > > --=20 > > ------------------------------------- > > Ing. Nikola CIPRICH > > LinuxBox.cz, s.r.o. > > 28. rijna 168, 709 01 Ostrava > >=20 > > tel.: +420 596 603 142 > > fax: +420 596 621 273 > > mobil: +420 777 093 799 > > www.linuxbox.cz > >=20 > > mobil servis: +420 737 238 656 > > email servis: servis@linuxbox.cz > > ------------------------------------- >=20 --=20 ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz ------------------------------------- --5oH/S/bF6lOfqCQb Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFLghgl3xdJJrLygV4RAhjlAKDDuEk+3fib3A2Af1kIkMgOkrkikACeMqGN OAoq1VR8TECw28TxKDUWY6E= =JJo9 -----END PGP SIGNATURE----- --5oH/S/bF6lOfqCQb--