From: Avi Kivity <avi@redhat.com>
To: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
t.hirofuchi@aist.go.jp, qemu-devel@nongnu.org,
kvm@vger.kernel.org, satoshi.itoh@aist.go.jp
Subject: Re: [Qemu-devel] [PATCH 0/2][RFC] postcopy migration: Linux char device for postcopy
Date: Thu, 12 Jan 2012 15:59:59 +0200 [thread overview]
Message-ID: <4F0EE75F.3020306@redhat.com> (raw)
In-Reply-To: <20120104030355.GL19274@valinux.co.jp>
On 01/04/2012 05:03 AM, Isaku Yamahata wrote:
> Yes, it's quite doable in user space(qemu) with a kernel-enhancement.
> And it would be easy to convert a separated daemon process into a thread
> in qemu.
>
> I think it should be done out side of qemu process for some reasons.
> (I just repeat same discussion at the KVM-forum because no one remembers
> it)
>
> - ptrace (and its variant)
> Some people want to investigate guest ram on host (qemu stopped or lively).
> For example, enhance crash utility and it will attach qemu process and
> debug guest kernel.
To debug the guest kernel you don't need to stop qemu itself. I agree
it's a problem for qemu debugging though.
>
> - core dump
> qemu process may core-dump.
> As postmortem analysis, people want to investigate guest RAM.
> Again enhance crash utility and it will read the core file and analyze
> guest kernel.
> When creating core, the qemu process is already dead.
Yes, strong point.
> It precludes the above possibilities to handle fault in qemu process.
I agree.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-01-12 14:00 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-29 1:26 [Qemu-devel] [PATCH 0/2][RFC] postcopy migration: Linux char device for postcopy Isaku Yamahata
2011-12-29 1:26 ` [Qemu-devel] [PATCH 1/2] export necessary symbols Isaku Yamahata
2011-12-29 1:26 ` [Qemu-devel] [PATCH 2/2] umem: chardevice for kvm postcopy Isaku Yamahata
2011-12-29 11:17 ` Avi Kivity
2011-12-29 12:22 ` Isaku Yamahata
2011-12-29 12:47 ` Avi Kivity
2012-01-05 4:08 ` [Qemu-devel] 回复: " thfbjyddx
2012-01-05 10:48 ` [Qemu-devel] 回??: " Isaku Yamahata
2012-01-05 11:10 ` Tommy
2012-01-05 12:18 ` Isaku Yamahata
2012-01-05 15:02 ` Tommy Tang
[not found] ` <4F05BB68.9050302@hotmail.com>
2012-01-05 15:05 ` Tommy Tang
2012-01-06 7:02 ` thfbjyddx
2012-01-06 17:13 ` [Qemu-devel] 回??: [PATCH 2/2] umem: chardevice for kvm?postcopy Isaku Yamahata
2011-12-29 1:31 ` [Qemu-devel] [PATCH 0/2][RFC] postcopy migration: Linux char device for postcopy Isaku Yamahata
2011-12-29 11:24 ` Avi Kivity
2011-12-29 12:39 ` Isaku Yamahata
2011-12-29 12:55 ` Avi Kivity
2011-12-29 13:49 ` Isaku Yamahata
2011-12-29 13:52 ` Avi Kivity
2011-12-29 14:18 ` Isaku Yamahata
2011-12-29 14:35 ` Avi Kivity
2011-12-29 14:49 ` Isaku Yamahata
2011-12-29 14:55 ` Avi Kivity
2011-12-29 15:53 ` Isaku Yamahata
2011-12-29 16:00 ` Avi Kivity
2011-12-29 16:01 ` Avi Kivity
2012-01-02 17:05 ` Andrea Arcangeli
2012-01-02 17:55 ` Paolo Bonzini
2012-01-03 14:25 ` Andrea Arcangeli
2012-01-12 13:57 ` Avi Kivity
2012-01-13 2:06 ` Andrea Arcangeli
2012-01-04 3:03 ` Isaku Yamahata
2012-01-12 13:59 ` Avi Kivity [this message]
2012-01-13 1:09 ` Benoit Hudzia
2012-01-13 1:31 ` Takuya Yoshikawa
2012-01-13 9:40 ` Benoit Hudzia
2012-01-13 2:03 ` Isaku Yamahata
2012-01-13 2:15 ` Isaku Yamahata
2012-01-13 9:55 ` Benoit Hudzia
2012-01-13 9:48 ` Benoit Hudzia
2012-01-13 2:09 ` Andrea Arcangeli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F0EE75F.3020306@redhat.com \
--to=avi@redhat.com \
--cc=aarcange@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=qemu-devel@nongnu.org \
--cc=satoshi.itoh@aist.go.jp \
--cc=t.hirofuchi@aist.go.jp \
--cc=yamahata@valinux.co.jp \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).