diff options
| author | Nick Terrell <terrelln@fb.com> | 2020-07-30 12:08:37 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-07-31 11:49:08 +0200 |
| commit | a30d8a39f0571425a459816ed8680e987a2ff279 (patch) | |
| tree | 4f6f365a0b16eecb18d183ee55c8c5adca58de03 /usr/Makefile | |
| parent | 48f7ddf785af24aa380f3282d8d4400883d0099e (diff) | |
| download | linux-a30d8a39f0571425a459816ed8680e987a2ff279.tar.bz2 | |
usr: Add support for zstd compressed initramfs
- Add support for a zstd compressed initramfs.
- Add compression for compressing built-in initramfs with zstd.
I have tested this patch by boot testing with buildroot and QEMU.
Specifically, I booted the kernel with both a zstd and gzip compressed
initramfs, both built into the kernel and separate. I ensured that the
correct compression algorithm was used. I tested on arm, aarch64, i386,
and x86_64.
This patch has been tested in production on aarch64 and x86_64 devices.
Additionally, I have performance measurements from internal use in
production. On an aarch64 device we saw 19 second boot time improvement
from switching from lzma to zstd (27 seconds to 8 seconds). On an x86_64
device we saw a 9 second boot time reduction from switching from xz to
zstd.
Signed-off-by: Nick Terrell <terrelln@fb.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200730190841.2071656-5-nickrterrell@gmail.com
Diffstat (limited to 'usr/Makefile')
| -rw-r--r-- | usr/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/usr/Makefile b/usr/Makefile index c12e6b15ce72..b1a81a40eab1 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -15,6 +15,7 @@ compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) := lzma compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) := xzmisc compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) := lzo compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) := lz4 +compress-$(CONFIG_INITRAMFS_COMPRESSION_ZSTD) := zstd obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |