From 852a7cec90f12516eb335bb29ed1398c2f0b7c2c Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Fri, 13 Apr 2012 17:33:02 +0000 Subject: xen-mapcache: don't unmap locked entry during mapcache invalidation When an IOREQ_TYPE_INVALIDATE is sent to QEMU, it invalidates all entry of the map cache even if it's locked. QEMU is not able to know that entry was invalidated, so when an IO access is requested a segfault occured. Signed-off-by: Julien Grall Signed-off-by: Stefano Stabellini --- xen-mapcache.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'xen-mapcache.c') diff --git a/xen-mapcache.c b/xen-mapcache.c index 75ac313f28..59ba085b62 100644 --- a/xen-mapcache.c +++ b/xen-mapcache.c @@ -387,6 +387,9 @@ void xen_invalidate_map_cache(void) if (entry->vaddr_base == NULL) { continue; } + if (entry->lock > 0) { + continue; + } if (munmap(entry->vaddr_base, entry->size) != 0) { perror("unmap fails"); -- cgit v1.2.1