Re: LZ4 decompression on Boot
On 2014-10-30 07:53, Andre Massena wrote:
> There is no "-l" (streaming) switch available on the r122 version of LZ4 I
> am running.
>
> I have see the "-l" option mentioned in other (non-Debian) forums however.
>
>
> Regards,
>
>
>
> Andre
This is what i get in jessie's lz4, version 0.0~r122-2:
root@jessie:~# lz4 -h
*** LZ4 Compression CLI 64-bits r122, by Yann Collet (Sep 18 2014) ***
[snip]
Advanced arguments :
-V : display Version number and exit
-v : verbose mode
-q : suppress warnings; specify twice to suppress errors too
-c : force write to standard output, even if it is the console
-t : test compressed file integrity
-l : compress using Legacy format (Linux kernel compression)
>
>
> En réponse à Vanessa Blöchinger <vanessa.bloechinger@ulukai.org> :
>> ------------------ Début du message d'origine --------------------
>>
>> On 2014-10-29 10:22, Andre Massena wrote:
>>> Hello all,
>>>
>>>
>>> having trawled through several search engines and perused various Debian lists, I am still in the dark...
>>>
>>> I am running Debian Jessie (Kernel 3.17.1) on a Thinkpad X230. I would like to use LZ4 to compress/decompress the kernel on booting.
>>> As per apt-get, the release of liblz4-1 I am running is r122-2.
>>> I have the following kernel settings -
>>>
>>> CONFIG_HAVE_KERNEL_LZ4=y
>>> CONFIG_KERNEL_LZ4=y
>>> CONFIG_KERNEL_LZ4=y
>>> CONFIG_ZRAM_LZ4_COMPRESS=y
>>> CONFIG_CRYPTO_LZ4=y
>>> CONFIG_CRYPTO_LZ4HC=y
>>> CONFIG_LZ4_COMPRESS=y
>>> CONFIG_LZ4HC_COMPRESS=y
>>> CONFIG_LZ4_DECOMPRESS=y
>>> CONFIG_DECOMPRESS_LZ4=y
>>>
>>> in /etc/initramfs-tools/conf.d I have a file called "lz4" which contains the line
>>> COMPRESS=lz4c.
>>> I subsequently run update-initramfs with the appropriate switches and reboot.
>>>
>>> Result is a "initramfs unpacking failed: junk in compiled archive" message at boot.
>>>
>>> Does anyone have an idea what I might have done wrong/incorrect or indeed any pointers?
>>>
>>>
>>>
>>> Regards,
>>>
>>>
>>>
>>> Andre
>>>
>> Hi Andre,
>>
>> looks like the kernel is using an older, less standardized format for its lz4 compression. Use the -l switch on lz4c for linux kernel support.
>>
>> See the lz4 man page and
>> https://code.google.com/p/lz4/issues/detail?id=66#c2
>>
>> Regards
>> Vanessa
>>
>>
>>
>> ------------------- Fin du message d'origine ---------------------
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