CVS commit: src/sys/arch/xen

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

Module Name:    src
Committed By:   bouyer
Date:           Tue Apr 19 22:14:30 UTC 2005

Modified Files:
        src/sys/arch/xen/i386: hypervisor_machdep.c
        src/sys/arch/xen/xen: evtchn.c xenevt.c

Log Message:
Avoid a race between do_hypervisor_event() and stipending() that could
cause an event to be both handled and marked as pending, or being
marked as pending twice (triggering the diagnostic check
evtch_maskcount[port] == 0 in hypervisor_set_ipending):
mask and clear event by word of 32bit in do_hypervisor_event() or stipending(),
instead of by indiviual bits in do_event() or xenevt_event().
In addition this is marginally more efficient.


To generate a diff of this commit:
cvs rdiff -r1.8 -r1.9 src/sys/arch/xen/i386/hypervisor_machdep.c
cvs rdiff -r1.10 -r1.11 src/sys/arch/xen/xen/evtchn.c
cvs rdiff -r1.4 -r1.5 src/sys/arch/xen/xen/xenevt.c

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