From fc6a83e63b187ecfd0e427c062ae09e3c104e291 Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Tue, 29 Mar 2022 13:54:14 +0100 Subject: [PATCH] kernel: fix initramfs reproducibility Make sure xz uses at least 2 threads so compression always runs in multi-threaded mode as the resulting file in single-threaded mode differs. Fixes: 29d7461d11 ("kernel: set options to make external initramfs reproducible") Signed-off-by: Daniel Golle --- include/kernel-defaults.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk index af1d59c481..1e82f7d739 100644 --- a/include/kernel-defaults.mk +++ b/include/kernel-defaults.mk @@ -181,7 +181,7 @@ endif $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),gzip -n -f -S .gzip -9n $(KERNEL_BUILD_DIR)/initrd.cpio) $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),$(STAGING_DIR_HOST)/bin/lzma e -lc1 -lp2 -pb2 $(KERNEL_BUILD_DIR)/initrd.cpio $(KERNEL_BUILD_DIR)/initrd.cpio.lzma) # ? $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),) - $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),$(STAGING_DIR_HOST)/bin/xz -T0 -9 -fz --check=crc32 $(KERNEL_BUILD_DIR)/initrd.cpio) + $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),$(STAGING_DIR_HOST)/bin/xz -T$(if $(filter 1,$(NPROC)),2,0) -9 -fz --check=crc32 $(KERNEL_BUILD_DIR)/initrd.cpio) # ? $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),) $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),$(STAGING_DIR_HOST)/bin/zstd -T0 -f -o $(KERNEL_BUILD_DIR)/initrd.cpio.zstd $(KERNEL_BUILD_DIR)/initrd.cpio) endif