ohhhhhhhhhhh (exclude linux-extra-rootfs.img build artifact)

CODE/linux/tmp_serial_tail.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+T() { tr -d '\r\0' < /home/deshab/qemu_serial_loop1.log; }
+echo '=== selftest ==='
+T | grep -a 'SELFTEST\|block/wake'
+echo '=== last 14 lines ==='
+T | tail -14
+echo '=== exception/panic markers ==='
+T | grep -a -n 'IDT. exception\|vector=0x000000000000000d\|PANIC\|panic\|dsk_load\|DSK jump' | tail -6