From: "Michael B. Trausch" Subject: Re: "tune2fs -I 256" runtime---can it be interrupted safely? Date: Tue, 11 Nov 2008 11:09:10 -0500 Message-ID: <20081111110910.4a6f7941@zest> References: <20081101151002.4ed9be99@zest> <20081101194617.0dc131c3@zest> <20081107211643.GB3184@webber.adilger.int> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/rqsEhb2M/0vnnKfoPJuaC3i"; protocol="application/pgp-signature"; micalg=PGP-RIPEMD160 Cc: linux-ext4@vger.kernel.org To: Andreas Dilger Return-path: Received: from an-out-0708.google.com ([209.85.132.243]:57462 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751450AbYKKQJW (ORCPT ); Tue, 11 Nov 2008 11:09:22 -0500 Received: by an-out-0708.google.com with SMTP id d40so650346and.1 for ; Tue, 11 Nov 2008 08:09:19 -0800 (PST) In-Reply-To: <20081107211643.GB3184@webber.adilger.int> Sender: linux-ext4-owner@vger.kernel.org List-ID: --Sig_/rqsEhb2M/0vnnKfoPJuaC3i Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 07 Nov 2008 14:16:43 -0700 Andreas Dilger wrote: > If you have time, after the backup is done could you please re-try the > "tune2fs -I 256" operation and let it go for a while, then "ltrace -p > {pid}" on the process from another window to see what it is doing (if > anything). You may need to have the "e2fsprogs-debuginfo" RPM > installed to get useful data there. >=20 > After grabbing some of the data with ltrace, also run "strace -p > {pid}" to get disk IO information, and finally "gdb -p {pid}" and > grab a stack trace with "bt", let it continue for a few seconds with > "c", and then CTRL-C again and grab another stack trace with "bt". Ugh, I forgot to do the gdb backtraces. *headdesk* I will do another run with them later. I do have an ltrace up and online at: http://fd0man.theunixplace.com/tune2fs.ltrace.bz2 The bzip2 file is 44 MB, and the uncompressed text is _huge_ (about 3 GB). This is a two hour run of "tune2fs -I 256 /dev/sdb" on an external 250 GB (235 GiB) drive formatted with the ext3 filesystem. I aborted the tune2fs run after 2 hours, though I am sure it would have run for far longer. Hopefully, this will give some insight as to what the problem might be. I _was_ hoping that it would make a difference in runtime that the filesystem was empty (I did this right after "mkfs.ext3 -I 128 /dev/sdb"), but it was still going very slowly... --- Mike --=20 My sigfile ran away and is on hiatus. http://www.trausch.us/ --Sig_/rqsEhb2M/0vnnKfoPJuaC3i Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEAREDAAYFAkkZriYACgkQ0kE/IBnFmjCs0QCfdMEZu6Q4iupTfGyRv496Z3yg 6fgAn3nNci94rUlenhHlynOWntpeJwum =P3+L -----END PGP SIGNATURE----- --Sig_/rqsEhb2M/0vnnKfoPJuaC3i--