diff --git a/src/syscall/fs.rs b/src/syscall/fs.rs
index 63bfe87508..49b364b472 100644
--- a/src/syscall/fs.rs
+++ b/src/syscall/fs.rs
@@ -855,6 +855,10 @@ pub fn sys_read(fd: FileHandle, buf: UserSliceWo, token: &mut CleanLockToken) ->
     Ok(bytes_read)
 }
 pub fn sys_write(fd: FileHandle, buf: UserSliceRo, token: &mut CleanLockToken) -> Result<usize> {
+    if fd.get() <= 5 || fd.get() > 0x4000000000000000 {
+        let name = context::current().read(token.token()).name;
+        info!("sys_write ENTER fd={} buf_len={} ctx='{}'", fd.get(), buf.len(), name);
+    }
     let result = (|| {
     let (bytes_written, desc_arc, desc) =
         file_op_generic_ext(fd, token, |scheme, desc_arc, desc, token| {