CVS commit: src/sys/arch/xen/xen

["Jean-Yves Migeon" <jym%netbsd.org@localhost>]

Module Name:    src
Committed By:   jym
Date:           Mon Apr 25 00:00:50 UTC 2011

Modified Files:
        src/sys/arch/xen/xen: if_xennet_xenbus.c

Log Message:
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


To generate a diff of this commit:
cvs rdiff -u -r1.48 -r1.49 src/sys/arch/xen/xen/if_xennet_xenbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.