Messages in this thread | | | Date | Sat, 8 Mar 2014 12:11:06 +0200 | From | Lasse Collin <> | Subject | Re: [PATCH] xz: make XZ_DEC_BCJ filters non-optional |
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On 2014-03-06 Geert Uytterhoeven wrote: > I once tried xz with an initrd on ARM. The kernel complained it > couldn't decompress the initrd, oops. I didn't investigate it at that > time, but probably I didn't have the x86 BCJ filter enabled, while I > compressed the initrd on\ amd64.
With so little information I can only guess, but it sounds unlikely that you would have enabled the x86 BCJ filter without knowing it unless you used some wrapper script that does it. It's more likely that the ARM kernel didn't support XZ at all, you forgot --check=crc32, or it ran out of RAM due to too big LZMA2 dictionary (if you used -9, the decompressor allocates 64 MiB of memory, but I cannot guess how much RAM the target system had).
In Documentation/xz.txt under "Notes on compression options" there are some tips about compressing files for the in-kernel XZ decompressor.
-- Lasse Collin | IRC: Larhzu @ IRCnet & Freenode
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