1 files changed, 8 insertions, 0 deletions
diff --git a/src/9p_io.zig b/src/9p_io.zig
index 6cf75c99..d80d7b30 100644
--- a/src/9p_io.zig
+++ b/src/9p_io.zig
@@ -1937,6 +1937,8 @@ test "9P shell environment states being inside pardes apart from how to reach it
 
 pub const Client = struct {
     pub const budget_ms: i64 = 2000;
+    /// Each write of a long one has this long to be answered (transact).
+    pub const write_budget_ms: i64 = 30_000;
 
     pub const max_depth: usize = 2 * ninep.max_welem;
 
@@ -2211,6 +2213,12 @@ pub const Client = struct {
                 const count = (try s.ask(.{ .write = .{ .fid = cur, .offset = written, .data = chunk } }, remote)).write;
                 if (count == 0 or count > chunk.len) return Error.Botch;
                 written += count;
+                // A long write is timed by its progress: each answer gives
+                // the next its own budget, so a large body (`pardes -`) goes
+                // in through one open, whole, however long it takes. The
+                // budget is a write's: a server putting in tens of MiB it
+                // held (pane.zig batchFor) answers that one write late.
+                s.deadline = nowMs() +| write_budget_ms;
             }
             return;
         }