Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: LZO irreversible output? | Date | Wed, 3 Feb 2010 23:54:11 +0100 |
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On Wednesday 03 February 2010, Nigel Cunningham wrote: > Hi all. > > (Not sent to LKML yesterday; no reply from linux-crypto yet, so resending). > > A while back now, I stopped supplying the LZF compression algorithm with > TuxOnIce and made LZO the default algorithm. Around the same time, we > started getting occasional errors when reading images; decompression > failures. > > I've finally managed to find the time to properly look at this, and have > managed to find a data page that LZO compresses, but seems to be unable > to decompress back to the original contents. I'm wondering whether this > is because I'm doing something wrong, or because there really is some > data the LZO (or the kernel implementation) can't do reversible > compression on.
Well, FWIW, we have never had any problems with the userland LZO in s2disk, so if anything is wrong with LZO here, I guess it's the kernel code.
Rafael
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