From 816d11177988a84711622144bab910d45da0f50c Mon Sep 17 00:00:00 2001 From: Tom Gundersen Date: Wed, 2 Oct 2019 14:24:55 +0200 Subject: [PATCH] assemblers/qemu/loop: open backing file O_DIRECT This should improve performance and save memory as we don't need two page caches. Signed-off-by: Tom Gundersen --- assemblers/org.osbuild.qemu | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/assemblers/org.osbuild.qemu b/assemblers/org.osbuild.qemu index 5add2143..808d2021 100755 --- a/assemblers/org.osbuild.qemu +++ b/assemblers/org.osbuild.qemu @@ -27,7 +27,7 @@ def mount_api(dest): @contextlib.contextmanager def loop_device(loop_client, image, size, offset=0): - fd = os.open(image, os.O_RDWR) + fd = os.open(image, os.O_RDWR | os.O_DIRECT) devname = loop_client.create_device(fd, offset=offset, sizelimit=size) os.close(fd) path = f"/dev/{devname}"