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Date: Sat, 8 Mar 2014 11:24:48 +0100 From: Geert Uytterhoeven <geert@...ux-m68k.org> To: Lasse Collin <lasse.collin@...aani.org> Cc: Florian Fainelli <f.fainelli@...il.com>, Phillip Lougher <phillip@...gher.demon.co.uk>, Kyle McMartin <kyle@...radead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] xz: make XZ_DEC_BCJ filters non-optional On Sat, Mar 8, 2014 at 11:11 AM, Lasse Collin <lasse.collin@...aani.org> wrote: > 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 I understand. Will see if I find time to retry... > 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, I definitely didn't pass --check=crc32, just plain xz (like I'm used to plain gzip ;-) So that's the most likely culprit. > 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). 2 GiB, so that shouldn't be an issue. > In Documentation/xz.txt under "Notes on compression options" there are > some tips about compressing files for the in-kernel XZ decompressor. Thanks, the --check=crc32 is indeed mentioned there. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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