Confirmed that on Linux the serial interrupt takes precedence over the timer

interrupt, so we don't need to worry about scheduler delays.  This means the
delay can be trimmed down to 25 miliseconds.  Add comment while at it.

diff --git a/editors/vi.c b/editors/vi.c
index 75e158cfc5caa2000fb47120217b30c57bcf218b..a75735945b69bd1d3b47dbc19bef488664a4d581 100644 (file)
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -2280,8 +2280,9 @@ static char readit(void)  // read (maybe cursor) key from stdin
                                        struct pollfd pfd;
                                        pfd.fd = 0;
                                        pfd.events = POLLIN;
-                                       // Rob needed 300ms timeout on qemu
-                                       if (safe_poll(&pfd, 1, /*timeout:*/ 300)) {
+                                       // Timeout is needed to reconnect escape sequences split
+                                       // up by transmission over a serial console.
+                                       if (safe_poll(&pfd, 1, 25)) {
                                                if (safe_read(0, readbuffer + n, 1) <= 0)
                                                        goto error;
                                                n++;