Messages in this thread |  | | Date | Fri, 5 Jan 2001 23:28:45 -0500 (EST) | From | Joel Koerwer <> | Subject | Re: Loopback filesystem still hangs on 2.4.0-test13-pre7 |
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I can't get it to fail either. All I had to do previously to get it to fail was write a large amount of data to the loopback mounted filesystem (rpm, cp, dd, anything), but now nothing...wonderful. Thanks Jens. I didn't get any errors, cosmetic or otherwise (of course, I'm still avoiding devfs, so I wouldn't expect to see the same errors as Bill....).
I would also say that a fix definetely exists in this case!
Thanks again.
William Stearns schrieb auf Jan 5, 2001 Über "Re: Loopback filesystem still...":
|> Date: Fri, 5 Jan 2001 13:38:39 -0500 (EST) |> From: William Stearns <wstearns@pobox.com> |> To: Jens Axboe <axboe@suse.de>, Joel Koerwer <joel@ideacode.com> |> Cc: ML-linux-kernel <linux-kernel@vger.kernel.org>, |> "Ts'o, Theodore -- Theodore Ts'o" <tytso@mit.edu>, tytso@valinux.com, |> Jeff Garzik <jgarzik@mandrakesoft.com> |> Subject: Re: Loopback filesystem still hangs on 2.4.0-test13-pre7 |> |> Good day, all, |> |> On Thu, 4 Jan 2001, Jens Axboe wrote: |> |> > On Wed, Jan 03 2001, William Stearns wrote: |> > > This is just meant as an informational message, not a complaint. |> > > Ted, could you note that this still exists on 2.4.0-test13-pre7 in the |> > > todo page? Many thanks. |> > > |> > > [1.] One line summary of the problem: |> > > Loopback filesystem writes still hang on 2.4.0-test13-pre7. |> > |> > Could you try with this patch: |> > |> > *.kernel.org/pub/linux/kernel/people/axboe/patches/2.4-prerelease/loop-remap-2 |> > |> > it survives 10 runs of your script and dbench abuse etc. If there are still |> > problems, I'd like to know... Should be faster too :-) |> |> I applied your Jan 4th version of this patch to 2.4.0-prerelease |> proper (Linus' Jan 4th diff had changes to fs/buffer.c that conflicted). |> I didn't apply either of the other patches in that directory. |> When I booted it, I got: |> |> ... |> devfs: devfs_register(): device already registered: "252" |> devfs: devfs_register(): device already registered: "253" |> devfs: devfs_register(): device already registered: "254" |> loop: loaded (max 255 devices) |> |> , but I suspect this is cosmetic. |> The verdict? This patch is marvelous! I _cannot_ crash it, even |> under heavy load. My test script went through 256 passes without even a |> glitch - previous kernels would have left one or more tasks in the "D" |> state by pass 16 or earlier without fail. Lots of bash's filling up |> memory and mostly filling swap, no problem (in fact, I had to kill off a |> few when I ran out of file descriptors at 1500 processes). Running X and |> some X apps (including xmms, which always seemed to spell death to old |> kernels) was also no problem. |> In short, _I_ _can't_ _get_ _it_ _to_ _fail_! I'm tremendously |> happy with the patch. |> I also agree with the speed assessment - 70M of linux source code |> copies (granted, between caches) in only a few seconds once the cache is |> loaded. |> |> I realize that my 24 hours of testing hardly counts as validation |> of the patch - could others beat on it as well (Joel?)? Jens, any chance |> you could update it for 2.4.0-final? |> My solitary vote is for moving this to "Fix exists but isn't |> merged" on Ted's list. |> Once again, my sincere thanks to both Jens and Jeff for their work |> on the loop filesystem. I'll keep beating on it. |> Cheers, |> - Bill |> |> --------------------------------------------------------------------------- |> "Scattered showers my ass!" |> -- Noah |> (Courtesy of "Michael B. Trausch" <mtrausch@wcnet.org>) |> -------------------------------------------------------------------------- |> William Stearns (wstearns@pobox.com). Mason, Buildkernel, named2hosts, |> and ipfwadm2ipchains are at: http://www.pobox.com/~wstearns |> LinuxMonth; articles for Linux Enthusiasts! http://www.linuxmonth.com |> -------------------------------------------------------------------------- |>
-- Joel Koerwer, Technology Specialist ideacode.com, Inc. http://www.ideacode.com/ US +1 919 247 4798 ___ _ _____ _ , ( > // / ' ' ) / __/______/> // ,-/-, /-< ____/> __ , , , _ __ / / (_) (__</_ (_/ / ) (_) (__/ (_(_(_/_</_/ (_ <_/
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