Oliver O'Halloran <ooh...@gmail.com> writes: > This modifies the script so that the -Z option takes an argument to > specify the compression type. It can either be 'gz', 'xz' or 'none'. > The legazy --no-gzip and -z options are still supported and will set > the compression to none and gzip respectively, but they are not > documented. > > Only xz -6 is used for compression rather than xz -9. Using compression > levels higher than 6 requires the decompressor to build a large (64MB) > dictionary when decompressing and some environments cannot satisfy large > allocations (e.g. POWER 6 LPAR partition firmware).
This isn't working for me on machines that use uImage. That's the "uboot" case in wrapper, where we do: ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \ $uboot_version -d "$vmz" "$ofile" ie. we tell mkimage that we're using gzip compression, regardless of whether we actually are. That leads to something like: ## Booting kernel from Legacy Image at 01000000 ... Image Name: Linux-4.8.0-rc5-compiler_gcc-6.2 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3381044 Bytes = 3.2 MiB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 0c000000 Booting using the fdt blob at 0xc000000 Uncompressing Kernel Image ... Error: Bad gzipped data gzip compressed: uncompress error -1 Must RESET board to recover So you'll need to do some juggling so you can pass the right argument for -C to mkimage. cheers