From a74b7770924e3825e2d64b85fbf2f927419e513f Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Fri, 13 Apr 2012 17:33:02 +0000 Subject: [PATCH] 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(+) diff --git a/xen-mapcache.c b/xen-mapcache.c index eade81632..16b7a869c 100644 --- a/xen-mapcache.c +++ b/xen-mapcache.c @@ -385,6 +385,9 @@ 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"); -- 2.39.5