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

["Zhang, Chen" <chen.zhang@intel.com>]

Hi~

Anyone have comments about this module?
We have some clients already try to use this module with COLO. Please review this part.
If no one want to maintain this module, I can maintain this module myself.

Thanks
Zhang Chen

> -----Original Message-----
> From: Qemu-devel <qemu-devel-
> bounces+chen.zhang=intel.com@nongnu.org> On Behalf Of Zhang, Chen
> Sent: Tuesday, January 7, 2020 12:33 PM
> To: Jason Wang <jasowang@redhat.com>; Paolo Bonzini
> <pbonzini@redhat.com>; Philippe Mathieu-Daudé <philmd@redhat.com>;
> qemu-dev <qemu-devel@nongnu.org>
> Cc: Zhang Chen <zhangckid@gmail.com>
> Subject: Re: [PATCH V4 0/5] Introduce Advanced Watch Dog module
> 
> 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.
> 
> 
> Thanks
> 
> Zhang Chen
> 
> 
> On 12/17/2019 8:45 PM, Zhang, Chen wrote:
> > From: Zhang Chen <chen.zhang@intel.com>
> >
> > 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 problems,
> >
> > 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.
> >
> > V4:
> >   - Add more introduction in qemu-options.hx
> >   - Addressed Paolo's comments add docs/awd.txt for the AWD module
> detail.
> >
> > V3:
> >   - Rebased on Qemu 4.2.0-rc1 code.
> >   - Fix commit message issue.
> >
> > V2:
> >   - Addressed Philippe comments add configure selector for AWD.
> >
> > Initial:
> >   - 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
> >