From: Louis Bouchard <louis.bouchard@canonical.com>
To: Atsushi Kumagai <ats-kumagai@wm.jp.nec.com>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>
Subject: Re: makedumpfile-1.5.9: Introduce parallel compression processing.
Date: Wed, 28 Oct 2015 09:23:52 +0100 [thread overview]
Message-ID: <56308618.3080908@canonical.com> (raw)
In-Reply-To: <0910DD04CBD6DE4193FCF86B9C00BE9701DF7CC4@BPXM01GP.gisp.nec.co.jp>
Hello Kumagai-san,
Le 28/10/2015 07:31, Atsushi Kumagai a écrit :
> Hello,
>
> makedumpfile version 1.5.9 is released.
> Your comments/patches are welcome.
>
> Main new feature:
> o Parallel compression
> - Add the new option "--num-threads" to enable parallel compression
> for faster processing. This option intends parallel compression
> while --split intends parallel i/o, they try to solve different
> bottlenecks.
>
> o Change the way to choose the non-cyclic mode
> - Add the new option "--work-dir" to specify the directory used to
> store the bitmap. This is the alternative to the combination of
> --non-cyclic and TMPDIR.
>
> o Support new kernels
> - The supported kernel is updated to 4.1 in this version.
> At first I'm going to extend the supported version to 4.2, but
> I found an issue that makedumpfile seems to exclude necessary pages
> by mistake on linux 4.2. When crash-7.1.3 reads that filtered dump file,
> the following message is shown.
>
> crash: page excluded: kernel virtual address: f3fe0000 type: "fill_task_struct"
>
> This will be fixed in the next version.
Have you fixed the 4.2 kernel issue already or you intend to work on it in the
future ?
Both Debian and Ubuntu run 4.2 kernel so if waiting for a fix is acceptable I
would rather bring in a 1.5.9 + patch version.
Kind regards,
...Louis
--
Louis Bouchard
Software engineer, Cloud & Sustaining eng.
Canonical Ltd
Ubuntu developer Debian Maintainer
GPG : 429D 7A3B DD05 B6F8 AF63 B9C4 8B3D 867C 823E 7A61
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next prev parent reply other threads:[~2015-10-28 8:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-28 6:31 makedumpfile-1.5.9: Introduce parallel compression processing Atsushi Kumagai
2015-10-28 8:23 ` Louis Bouchard [this message]
2015-10-28 9:07 ` Atsushi Kumagai
2015-10-28 9:49 ` Louis Bouchard
2015-11-19 7:30 ` Atsushi Kumagai
2015-11-20 10:22 ` Louis Bouchard
2015-11-24 2:48 ` Atsushi Kumagai
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