[PATCH 2/2] check: optionally compress core dumps

["Darrick J. Wong" <djwong@kernel.org>]

From: Darrick J. Wong <djwong@kernel.org>

Compress coredumps whenever desired to save space.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 README    |    1 +
 common/rc |   13 +++++++++++++
 2 files changed, 14 insertions(+)


diff --git a/README b/README
index 80d148be82..ec923ca564 100644
--- a/README
+++ b/README
@@ -241,6 +241,7 @@ Misc:
    this option is supported for all filesystems currently only -overlay is
    expected to run without issues. For other filesystems additional patches
    and fixes to the test suite might be needed.
+ - Set COMPRESS_COREDUMPS=1 to compress core dumps with gzip -9.
 
 ______________________
 USING THE FSQA SUITE
diff --git a/common/rc b/common/rc
index 9750d06a9a..d3af4e07b2 100644
--- a/common/rc
+++ b/common/rc
@@ -4955,12 +4955,25 @@ _save_coredump()
 	local core_hash="$(_md5_checksum "$path")"
 	local out_file="$RESULT_BASE/$seqnum.core.$core_hash"
 
+	if [ "$COMPRESS_COREDUMPS" = "1" ]; then
+		out_file="${out_file}.gz"
+	fi
+
 	if [ -s "$out_file" ]; then
 		rm -f "$path"
 		return
 	fi
 	rm -f "$out_file"
 
+	if [ "$COMPRESS_COREDUMPS" = "1" ]; then
+		if gzip -9 < "$path" > "$out_file"; then
+			rm -f "$path"
+		else
+			rm -f "$out_file"
+		fi
+		return
+	fi
+
 	mv "$path" "$out_file"
 }