patch

--- a/buildbot/slave/ktsan-x86-64/run.sh
+++ b/buildbot/slave/ktsan-x86-64/run.sh
@@ -1,8 +1,11 @@
 #!/bin/bash
 
-GCC_PATH=~/gcc/install/bin/gcc
-IMAGE=~/qemu/image/wheezy.img
-BOOT_TIMEOUT=80
+set -eux
+
+QEMU=/usr/libexec/qemu-kvm
+GCC_PATH=/home/sanitizers/gcc-5.2.0/install/bin/gcc
+IMAGE=/home/sanitizers/qemu/image/wheezy.img
+BOOT_TIMEOUT=600
 
 echo @@@BUILD_STEP build@@@
 echo
@@ -27,12 +30,12 @@ rm -f vm.log
 
 BOOT_START=$(date +%s.%N)
 
-qemu-system-x86_64 \
+$QEMU \
        -hda image.img \
        -m 20G \
        -smp 4 \
        -net user,hostfwd=tcp::10022-:22 \
-       -net nic \
+       -net nic,vlan=0,model=e1000 \
        -nographic \
        -kernel ./arch/x86/boot/bzImage \
        -append "console=ttyS0 root=/dev/sda debug earlyprintk=serial" \
@@ -49,12 +52,12 @@ kill -0 $(cat vm.pid)
 trap "kill $(cat vm.pid); cat vm.log; exit 1" EXIT
 
 timeout $BOOT_TIMEOUT tail -n +0 -f vm.log | \
-       grep -q --line-buffered "Starting.*sshd"
+       grep -q --line-buffered -m 1 "Starting.*sshd"
 
 BOOT_FINISH=$(date +%s.%N)
-BOOT_TIME=$(echo "$BOOT_FINISH - $BOOT_START" | bc)
+BOOT_TIME=$(echo "scale=2; ($BOOT_FINISH - $BOOT_START)/1" | bc)
 
-echo @@@STEP_TEXT@boot time: $BOOT_TIME@@@
+echo @@@STEP_TEXT@time: $BOOT_TIME@@@
 
 kill $(cat vm.pid)