From f48ab8bcaabf61735cde17a4c3c38fa5471e9843 Mon Sep 17 00:00:00 2001
From: Yuchen Liang <yuchen@neon.tech>
Date: Tue, 1 Oct 2024 03:57:58 +0000
Subject: [PATCH] use O_DIRECT as preferred

Signed-off-by: Yuchen Liang <yuchen@neon.tech>
---
 libs/pageserver_api/src/models.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/pageserver_api/src/models.rs b/libs/pageserver_api/src/models.rs
index 67da2783f5ca..b73fcc9d8303 100644
--- a/libs/pageserver_api/src/models.rs
+++ b/libs/pageserver_api/src/models.rs
@@ -1005,7 +1005,11 @@ pub mod virtual_file {
 
     impl IoMode {
         pub const fn preferred() -> Self {
-            Self::Buffered
+            if cfg!(target_os = "linux") {
+                Self::Direct
+            } else {
+                Self::Buffered
+            }
         }
     }