From 61de5195f5500a020540d0fb49cd1a2434b2dd1c Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Tue, 5 Mar 2024 19:04:09 -0500
Subject: [PATCH] blockdev: Use --direct-io=on for losetup

This is what other projects do; it avoids double buffering
and is generally a good idea.

Signed-off-by: Colin Walters <walters@verbum.org>
---
 lib/src/blockdev.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/blockdev.rs b/lib/src/blockdev.rs
index a984a032..f6683e3e 100644
--- a/lib/src/blockdev.rs
+++ b/lib/src/blockdev.rs
@@ -84,7 +84,7 @@ impl LoopbackDevice {
     // Create a new loopback block device targeting the provided file path.
     pub(crate) fn new(path: &Path) -> Result<Self> {
         let dev = Task::new("losetup", "losetup")
-            .args(["--show", "-P", "--find"])
+            .args(["--show", "--direct-io=on", "-P", "--find"])
             .arg(path)
             .quiet()
             .read()?;