Kbuild: use normal compression settings for tar*-pkg
For large kernel configurations (like a distribution kernel)
targz-pkg takes a quite long time to just do the compression.
I clocked it at 15+mins for a SUSE kernel like config on a fast
system. And tarxz and bzip2 are even slower.
The main reason is that the script that is doing the taring sets
the highest compression level (-9). When I change it to just
use the defaults the gzip time for the same kernel goes down
to ~3 mins. I haven't tested xz and bzip, but I expect those
to be much faster too.
I'm not willing to wait that long for a small compression
gain. So just change the script to use the defaults.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/package/buildtar b/scripts/package/buildtar
index 8a7b155..632377f 100644
--- a/scripts/package/buildtar
+++ b/scripts/package/buildtar
@@ -28,15 +28,15 @@
file_ext=""
;;
targz-pkg)
- compress="gzip -c9"
+ compress="gzip"
file_ext=".gz"
;;
tarbz2-pkg)
- compress="bzip2 -c9"
+ compress="bzip2"
file_ext=".bz2"
;;
tarxz-pkg)
- compress="xz -c9"
+ compress="xz"
file_ext=".xz"
;;
*)