---
- branch: MAIN
  date: Mon Apr 25 00:00:50 UTC 2011
  files:
  - new: '1.49'
    old: '1.48'
    path: src/sys/arch/xen/xen/if_xennet_xenbus.c
    pathrev: src/sys/arch/xen/xen/if_xennet_xenbus.c@1.49
    type: modified
  id: 20110425T000050Z.d7453fafd44b98c7706cce25449cf04392e9d97e
  log: |
    Separate xennet(4) backend initialization code ("resume") from the part
    that talks with Xenstore to query backend's information. Resuming is now
    performed just after xennet(4) attachment instead of waiting for backend
    to announce its features in Xenstore and change it state.

    This fixes the race observed by Urban Boquist when the domU boots with
    root on NFS.

    FWIW, the boot code (when root is NFS-backed) can innit() the xennet(4)
    interface very early: it tried to access ifnet structures that were not
    yet allocated.

    Will ask for a pullup. Thanks to Urban for reporting the issue and
    investigate it. Confirmed fixed. No regression observed by me for
    dynamic attach/detach of xvif(4) and xennet(4) interfaces.

    See also http://mail-index.netbsd.org/port-xen/2011/04/18/msg006647.html
  module: src
  subject: 'CVS commit: src/sys/arch/xen/xen'
  unixtime: '1303689650'
  user: jym