linux-kernel - alg: comp: Compression test 1 failed for lz4

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Date:   Sat, 11 Feb 2017 19:34:28 -0800 (PST)
From:   Christian Kujau <lists@...dbynature.de>
To:     linux-kernel@...r.kernel.org
cc:     Rui Salvaterra <rsalvaterra@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Chanho Min <chanho.min@....com>
Subject: alg: comp: Compression test 1 failed for lz4

Hi,

while the LZ4 and LZ4HC module appears to be available on PowerPC 32-bit 
(it's a PowerBook G4), I get these warnings below during module load. The 
lzo module is working just fine and I'm using it extensively for ZRAM on 
that machine.

Is this a configuration[0] error or is LZ4 just not supported for this 
architecture?

Thanks,
Christian.

[0] http://nerdbynature.de/bits/4.10-rc7/config_4.10-rc7.txt - but
    I get the same messages with a stock Debian/4.9 configuration too.


$ modprobe lz4
alg: comp: Compression test 1 failed for lz4-generic
00000000: f0 10 4a 6f 69 6e 20 75 73 20 6e 6f 77 20 61 6e
00000010: 64 20 73 68 61 72 65 20 74 68 65 20 73 6f 66 74
00000020: 77 00 0d 0f 00 23 0b 50 77 61 72 65 20
alg: acomp: Compression test 1 failed for lz4-scomp
00000000: f0 10 4a 6f 69 6e 20 75 73 20 6e 6f 77 20 61 6e
00000010: 64 20 73 68 61 72 65 20 74 68 65 20 73 6f 66 74
00000020: 77 00 0d 0f 00 23 0b 50 77 61 72 65 20


$ modprobe lz4hc
alg: comp: Compression test 1 failed for lz4hc-generic
00000000: f0 10 4a 6f 69 6e 20 75 73 20 6e 6f 77 20 61 6e
00000010: 64 20 73 68 61 72 65 20 74 68 65 20 73 6f 66 74
00000020: 77 00 0d 0f 00 23 0b 50 77 61 72 65 20
alg: acomp: Compression test 1 failed for lz4hc-scomp
00000000: f0 10 4a 6f 69 6e 20 75 73 20 6e 6f 77 20 61 6e
00000010: 64 20 73 68 61 72 65 20 74 68 65 20 73 6f 66 74
00000020: 77 00 0d 0f 00 23 0b 50 77 61 72 65 20

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