commit 65b05c8a5deabb49378fe78e8a83ded524af09fe
author Sasha Levin <sasha.levin@oracle.com> Tue Oct 20 23:30:41 2015 -0400
committer Sasha Levin <sasha.levin@oracle.com> Wed Oct 21 11:53:28 2015 -0400
tree f4e01a11c4f175b3ff75437fc890e7afdf5fa215
parent 3a90da6305e2741e0da7b89bb16deed038458aee

kvmtool: set 9p caching mode to support writable mmaps

9p doesn't support writable mmaps by default (when cache=none), set it to
loose caching to allow for writable mmaps.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

builtin-run.c

diff --git a/builtin-run.c b/builtin-run.c
index 0fb8ecf..2b53751 100644
--- a/builtin-run.c
+++ b/builtin-run.c
@@ -600,7 +600,7 @@
 	}
 
 	if (kvm->cfg.using_rootfs) {
-		strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p");
+		strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L,cache=loose rootfstype=9p");
 		if (kvm->cfg.custom_rootfs) {
 			kvm_run_set_sandbox(kvm);