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Re: [PATCH V4 0/5] Introduce Advanced Watch Dog module

From: Zhang, Chen
Subject: Re: [PATCH V4 0/5] Introduce Advanced Watch Dog module
Date: Tue, 7 Jan 2020 12:32:41 +0800
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0

Hi All,

No news for a while about this series.

This version already add new docs to address Paolo's comments.

Please give me more comments.


Zhang Chen

On 12/17/2019 8:45 PM, Zhang, Chen wrote:
From: Zhang Chen <address@hidden>

Advanced Watch Dog is an universal monitoring module on VMM side, it can be used
to detect network down(VMM to guest, VMM to VMM, VMM to another remote server)
and do previously set operation. Current AWD patch just accept any input as the
signal to refresh the watchdog timer, and we can also make a certain interactive
protocol here. For the outputs, user can pre-write some command or some messages
in the AWD opt-script. We noticed that there is no way for VMM communicate
directly, maybe some people think we don't need such things(up layer
software like openstack can handle it). so we engaged with real customer found
that they need a lightweight and efficient mechanism to solve some practical 

For example Edge Computing cases(they think high level software is too heavy
to use in Edge or it is hard to manage and combine with VM instance).
It make user have basic VM/Host network monitoring tools and basic false
tolerance and recovery solution..

Please see the detail documentation in the last patch.

  - Add more introduction in qemu-options.hx
  - Addressed Paolo's comments add docs/awd.txt for the AWD module detail.

  - Rebased on Qemu 4.2.0-rc1 code.
  - Fix commit message issue.

  - Addressed Philippe comments add configure selector for AWD.

  - Initial version.

Zhang Chen (5):
   net/awd.c: Introduce Advanced Watch Dog module framework
   net/awd.c: Initailize input/output chardev
   net/awd.c: Load advanced watch dog worker thread job
   vl.c: Make Advanced Watch Dog delayed initialization
   docs/awd.txt: Add doc to introduce Advanced WatchDog(AWD) module

  configure         |   9 +
  docs/awd.txt      |  88 +++++++++
  net/Makefile.objs |   1 +
  net/awd.c         | 491 ++++++++++++++++++++++++++++++++++++++++++++++
  qemu-options.hx   |  20 ++
  vl.c              |   7 +
  6 files changed, 616 insertions(+)
  create mode 100644 docs/awd.txt
  create mode 100644 net/awd.c

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