Quick, Dirty, Fragile, Should Work (TM).
Signed-off-by: Alexey Dobriyan <[email protected]>
---
mm-bisect | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
diff -uprN linux-vanilla/mm-bisect linux-mm-bisect/mm-bisect
--- linux-vanilla/mm-bisect 1970-01-01 03:00:00.000000000 +0300
+++ linux-mm-bisect/mm-bisect 2005-09-23 04:25:26.000000000 +0400
@@ -0,0 +1,82 @@
+#!/bin/sh
+#
+# Bisecting through -mm.
+#
+# Assumptions
+# -----------
+# 1) X works
+# 2) X-mmY doesn't
+# 3) -mmY in broken-out form is in $QUILT_PATCHES, "quilt push -a"'d
+#
+# Usage cycle
+# -----------
+# mm-bisect start
+# ... <=== applying/reverting patches
+# [recompile]
+# [retest]
+# mm-bisect good <=== if it works
+# ...
+# [recompile]
+# [retest]
+# mm-bisect bad <=== if it doesn't
+# [...]
+# Sucker is fix-typo.patch <=== who to blame
+
+usage()
+{
+ echo >&2 'usage: mm-bisect [start | good | bad]'
+ exit 1
+}
+
+case "$#" in
+0)
+ usage
+ ;;
+*)
+ CUR=$(quilt applied | wc -l)
+ case "$1" in
+ start)
+ echo 0 >.mm-bisect-good
+ echo $CUR >.mm-bisect-bad
+ ;;
+ good)
+ if [ $(($(cat .mm-bisect-bad) - $CUR)) = 1 ]; then
+ quilt push -q >/dev/null
+ echo -n "Sucker is "
+ quilt top
+ rm -f .mm-bisect-bad .mm-bisect-good
+ exit 0
+ fi
+ echo $CUR >.mm-bisect-good
+ ;;
+ bad)
+ if [ $(($CUR - $(cat .mm-bisect-good))) = 1 ]; then
+ echo -n "Sucker is "
+ quilt top
+ rm -f .mm-bisect-bad .mm-bisect-good
+ exit 0
+ fi
+ echo $CUR >.mm-bisect-bad
+ ;;
+ *)
+ usage
+ ;;
+ esac
+ GOOD=$(cat .mm-bisect-good)
+ BAD=$(cat .mm-bisect-bad)
+ MIDDLE=$((($BAD + $GOOD) / 2))
+ echo "[$GOOD .. $BAD] => $MIDDLE"
+ if [ $MIDDLE -lt $CUR ]; then
+ while [ $MIDDLE -lt $(quilt applied | wc -l) ]; do
+ quilt pop -q | sed -e "s/^Removing patch/-/" \
+ -e "/^Now at patch /d"
+ done
+ else
+ while [ $MIDDLE -gt $(quilt applied | wc -l) ]; do
+ quilt push -q | sed -e "s/^Applying patch/+/" \
+ -e "/^Now at patch /d"
+ done
+ fi
+ quilt top
+ echo "[$GOOD .. => $MIDDLE <= .. $BAD]"
+esac
-
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