Re: CVS commit: src/sys/arch

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On 19.11.2011 18:13, Cherry G. Mathew wrote:
> Module Name:    src
> Committed By:   cherry
> Date:           Sat Nov 19 17:13:39 UTC 2011
>
> Modified Files:
>         src/sys/arch/x86/include: cpu.h
>         src/sys/arch/xen/include: hypervisor.h
>         src/sys/arch/xen/x86: hypervisor_machdep.c
>         src/sys/arch/xen/xen: evtchn.c
>
> Log Message:
> [merging from cherry-xenmp] bring in bouyer@'s changes via:
> http://mail-index.netbsd.org/source-changes/2011/10/22/msg028271.html
>  From the Log:
> Log Message:
> Various interrupt fixes, mainly:
> keep a per-cpu mask of enabled events, and use it to get pending events.
> A cpu-specific event (all of them at this time) should not be ever masked
> by another CPU, because it may prevent the target CPU from seeing it
> (the clock events all fires at once for example).

This patch breaks various xenstore/xenbus related functions, like 
ballooning. Steps to reproduce:
- connect to a dom0 system
- try ballooning up or down, with:
sysctl -w machdep.xen.balloon.target=100000

All newly created processes will then stay in tstile, and the sysctl 
never returns, waiting on "rplq" wait channel.

Observed in QEMU, Virtualbox, and my amd64 spare host.

--
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost