From: Masami Hiramatsu <mhiramat@redhat.com>
To: Satoshi OSHIMA <satoshi.oshima.fk@hitachi.com>
Cc: systemtap@sourceware.org, 橋本K <hisashi.hashimoto.wh@hitachi.com>,
"Yumiko SUGITA" <yumiko.sugita.yf@hitachi.com>
Subject: Re: Discussion at Linux Foundation Japan Symposium
Date: Thu, 18 Dec 2008 15:41:00 -0000 [thread overview]
Message-ID: <494A6DA3.7010604@redhat.com> (raw)
In-Reply-To: <494A053D.4030808@hitachi.com>
Hi Satoshi,
Thank you for reporting!
Satoshi OSHIMA wrote:
> Hi all,
>
> Long time no see and sorry for my late report.
>
> I attended 9th Linux Foundation Japan Symposium and
> discussed on issues of systemtap project with Ted Ts'o,
> James Bottomley and Jonathan Corbet.
FYI, we also discuss this topic on below bugzilla.
http://sourceware.org/bugzilla/show_bug.cgi?id=7042
There are links to videos of the symposium on that bugzilla.
> In my understanding, they demand the following things:
>
> (1) Follow upstream first
>
> Utrace and uprobe features are currently available only
> on Fedora and Red Hat Enterprise Linux, since those
> patches are not merged into upstream kernel yet.
>
> my suggestion:
>
> To reduce complaints of upstream kernel developers,
> systemtap project may need to postpone adding new
> uprobe features until getting utrace (and uprobe)
> patch set accepted in mainline.
>
>
> (2) Maintain tapset
>
> Systemtap users (including kernel developers) get
> frustrated because tapsets often do not work on
> the latest kernel. Moreover, sometimes users
> have to fix the tapset incompatibility of kernels.
>
> my suggestion:
>
> If systemtap procjet can fix this kind of incompatibilities
> within a few hours or days as Myths about systemtap
> on the wiki claims, releasing new systemtap minor release
> tarball for each upstream kernel release would help users.
Agreed, We have a weekly snapshot for it. however, that means
it could delay 1 week. And also, we should provide which
release can work on the latest kernel.
> (3) Make no debuginfo version
>
> Systemtap always requires kernel debuginfo to use.
> Unfortunately, it is hard for users of some distributions
> to have debuginfo.
>
> my suggestion:
>
> If systemtap has a build option to make no debuginfo version,
> this complain will be reduced. I know we had had it before.
> We should provide it again.
As Prasad said, systemtap had supported no-dwarf mode, however,
currently it is disabled (due to uprobe issue?). I strongly
recommend to re-enable it only for kernel-space probes as soon as possible.
> (4) Have conversations frequently with Kernel Community
>
> I understand that Frank has tried to communicate with upstream
> kernel community. However, it seems that developers of upstream
> kernel feel it is not enough.
>
> my suggestion:
>
> I know that systemtap is a bit different from other part of
> the kernel. Usual kernel subsystem maintainers are chosen
> on activities in lkml. On the other hand, systemtap maintainer's
> activities are invisible for almost all of the kernel developers.
>
> This may be one of the reasons of their frastration.
> To solve this problem, we should periodically make announcements
> of systemtap update and require questions or comments.
From Linux foundation video, I think we also would better work
with some kernel (subsystem) maintainers, and ask them
what they need to use systemtap easy.
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com
next prev parent reply other threads:[~2008-12-18 15:35 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-18 8:33 Satoshi OSHIMA
2008-12-18 8:59 ` KOSAKI Motohiro
2008-12-18 9:07 ` Jun Koi
2008-12-18 9:21 ` jidong xiao
2008-12-18 9:28 ` Jun Koi
2008-12-18 9:35 ` KOSAKI Motohiro
2008-12-18 9:37 ` Jun Koi
2008-12-18 9:42 ` Jun Koi
2008-12-18 9:46 ` KOSAKI Motohiro
2008-12-18 9:58 ` K.Prasad
2008-12-18 10:02 ` KOSAKI Motohiro
2008-12-18 10:21 ` K.Prasad
2008-12-18 15:52 ` Masami Hiramatsu
2008-12-18 15:41 ` Masami Hiramatsu [this message]
2008-12-18 17:11 ` Frank Ch. Eigler
2008-12-19 0:08 ` KOSAKI Motohiro
2008-12-19 0:58 ` Frank Ch. Eigler
2008-12-19 1:39 ` KOSAKI Motohiro
2008-12-19 23:51 ` William Cohen
2008-12-20 1:51 ` Richard J Moore
2008-12-20 14:27 ` Masami Hiramatsu
2008-12-19 0:45 ` Masami Hiramatsu
2008-12-22 18:22 Frank Ch. Eigler
2008-12-22 20:38 ` Theodore Tso
2008-12-22 22:41 ` Frank Ch. Eigler
2008-12-23 0:33 ` Theodore Tso
2008-12-23 0:34 ` Masami Hiramatsu
2008-12-23 0:44 ` Theodore Tso
2008-12-23 21:13 ` Roland McGrath
2008-12-23 22:13 ` Masami Hiramatsu
2008-12-23 14:28 ` Frank Ch. Eigler
2008-12-23 22:21 ` Roland McGrath
2008-12-23 22:33 ` Masami Hiramatsu
2008-12-23 22:44 ` Roland McGrath
2008-12-24 3:40 ` Masami Hiramatsu
2008-12-24 8:48 ` Roland McGrath
2008-12-24 18:14 ` Masami Hiramatsu
2008-12-24 19:26 ` Roland McGrath
2008-12-24 21:02 ` Theodore Tso
2008-12-26 18:17 ` Roland McGrath
2008-12-23 23:27 ` Theodore Tso
2008-12-24 6:11 ` Masami Hiramatsu
2009-01-10 2:48 ` Theodore Tso
2009-01-11 16:29 ` Frank Ch. Eigler
2009-01-12 18:18 ` Masami Hiramatsu
2009-01-12 18:53 ` Frank Ch. Eigler
2009-01-12 19:29 ` Masami Hiramatsu
2009-01-12 19:26 ` Theodore Tso
2009-01-12 20:01 ` Frank Ch. Eigler
2009-01-12 19:05 ` Jason Baron
2009-01-12 19:52 ` Theodore Tso
2009-01-12 20:32 ` Frank Ch. Eigler
2009-01-08 9:22 ` Roland McGrath
2009-01-10 1:33 ` Theodore Tso
2008-12-22 23:34 ` Masami Hiramatsu
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