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

[Manuel Bouyer <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Tue Sep 20 20:29:18 UTC 2005

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

Log Message:
When disconnecting a device, we have to wait for pending I/O before releasing
the ressources (this can lead to a dom0 kernel crash when destroying a domain
with active I/O going). For this, add a refcount to struct xbdback_instance,
and defer CMSG_BLKIF_BE_DISCONNECT reply until refcount is back to 0 (which
means all queued buffers have completed).
Based on patch sent by Jed Davis on port-xen.


To generate a diff of this commit:
cvs rdiff -r1.15 -r1.16 src/sys/arch/xen/xen/xbdback.c

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