From 20ef3bb8d4e228cdcd2c81c46c98ffb95a6398aa Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Fri, 22 Jan 2021 22:39:46 -0800
Subject: mount: use direct_io to avoid OS page cache

fix https://github.com/chrislusf/seaweedfs/issues/1752
---
 weed/filesys/filehandle.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'weed/filesys/filehandle.go')

diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index d5f6cc38e..6225ab968 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -90,8 +90,9 @@ func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fus
 		glog.Warningf("%s FileHandle Read %d: [%d,%d) size %d totalRead %d", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size), req.Size, totalRead)
 		totalRead = min(int64(len(buff)), totalRead)
 	}
-	// resp.Data = buff[:totalRead]
-	resp.Data = buff
+	if err == nil {
+		resp.Data = buff[:totalRead]
+	}
 
 	return err
 }
-- 
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