Re: LZ4 decompression on Boot
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 En réponse à Vanessa Blöchinger vanessa.bloechin...@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 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/54512bf3.20...@ulukai.org --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414652028.5451e07cb9...@lavache.alinto.com
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.bloechin...@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 - -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/5451fec4.3010...@ulukai.org
Re: LZ4 decompression on Boot
Vanessa, you are of course correct. I went to the trouble of downloading the latest (r123) LZ4 tools source and compiled same. There is indeed an -l switch which is only visible when the long help (-H) argument is passed I am however, still in the dark as to how I get my kernel compressed/decompressed (see original post). Information/documentation as to how to accomplish this on a Debian system is sparse, to say the least. Regards, Andre En réponse à Vanessa Blöchinger vanessa.bloechin...@ulukai.org : -- Début du message d'origine 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.bloechin...@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 - -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/5451fec4.3010...@ulukai.org --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414661104.545203f0a4...@lavache.alinto.com
Re: LZ4 decompression on Boot
On 29 Oct 2014 10:29, Andre Massena andre_mass...@lavache.com 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. I believe this causes the initramfs image to be compressed differently. It would then seem that your boot loader is unable to decompress it. 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 www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414574536.5450b1c823...@lavache.alinto.com My guess is that your version/variant of grub (or lilo) doesn't understand lz4.
Re: LZ4 decompression on Boot
John, I was not aware that Grub played a role in decompressing a kernal at boot as that is a kernel function. I am running Grub 2.02 if that matters. What I should have mentioned in my first post is that gzip (of course) and xz work flawlessly in decompressing at boot, if selected. Regards, Andre En réponse à John-John Tedro johnjohn.te...@gmail.com : -- Début du message d'origine On 29 Oct 2014 10:29, Andre Massena andre_mass...@lavache.com 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. I believe this causes the initramfs image to be compressed differently. It would then seem that your boot loader is unable to decompress it. 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 www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414574536.5450b1c823...@lavache.alinto.com My guess is that your version/variant of grub (or lilo) doesn't understand lz4. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414579398.5450c4c699...@lavache.alinto.com
Re: LZ4 decompression on Boot
No takers here? I would have thought that compress/decompress at Boot would have been mildly interesting for some... Regards, Andre En réponse à Andre Massena andre_mass...@lavache.com : -- Début du message d'origine John, I was not aware that Grub played a role in decompressing a kernal at boot as that is a kernel function. I am running Grub 2.02 if that matters. What I should have mentioned in my first post is that gzip (of course) and xz work flawlessly in decompressing at boot, if selected. Regards, Andre En réponse à John-John Tedro johnjohn.te...@gmail.com : -- Début du message d'origine On 29 Oct 2014 10:29, Andre Massena andre_mass...@lavache.com 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. I believe this causes the initramfs image to be compressed differently. It would then seem that your boot loader is unable to decompress it. 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 www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414574536.5450b1c823...@lavache.alinto.com My guess is that your version/variant of grub (or lilo) doesn't understand lz4. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414585297.5450dbd1ed...@lavache.alinto.com
Re: LZ4 decompression on Boot
I cannot believe that nobody has tried to boot using LZ4 kernel compression/decompression. According to the (very sparse) documentation, this feature has been available since the end of 2013. Regards, Andre En réponse à Andre Massena andre_mass...@lavache.com : -- Début du message d'origine No takers here? I would have thought that compress/decompress at Boot would have been mildly interesting for some... Regards, Andre En réponse à Andre Massena andre_mass...@lavache.com : -- Début du message d'origine John, I was not aware that Grub played a role in decompressing a kernal at boot as that is a kernel function. I am running Grub 2.02 if that matters. What I should have mentioned in my first post is that gzip (of course) and xz work flawlessly in decompressing at boot, if selected. Regards, Andre En réponse à John-John Tedro johnjohn.te...@gmail.com : -- Début du message d'origine On 29 Oct 2014 10:29, Andre Massena andre_mass...@lavache.com 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. I believe this causes the initramfs image to be compressed differently. It would then seem that your boot loader is unable to decompress it. 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 www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414574536.5450b1c823...@lavache.alinto.com My guess is that your version/variant of grub (or lilo) doesn't understand lz4. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. --- Fin du message d'origine - www.lavache.com : l'email gratuit sans pub, vachement meuh. www.hugolescargot.com : coloriage, fiches recettes et bricolage, chansons, etc. www.jeux-gratuits.com : des jeux en ligne pour toute la famille. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1414603300.54512224b6...@lavache.alinto.com
Re: LZ4 decompression on Boot
Hi Andre, Le mercredi, 29 octobre 2014, 11.43:18 Andre Massena a écrit : I was not aware that Grub played a role in decompressing a kernal at boot as that is a kernel function. (…) Le mercredi, 29 octobre 2014, 13.21:37 Andre Massena a écrit : No takers here? (…) Le mercredi, 29 octobre 2014, 18.21:40 Andre Massena a écrit : I cannot believe that nobody has tried to boot using LZ4 kernel compression/decompression. I would suggest that you wait slightly more than 5 hours before re- pinging the list… Please be patient. Now, for the subject at hand, I suspect most users don't care switching away from the default kernel compression scheme, which happens to just work. It also has a minor impact on disk-space and an even smaller impact on boot time. I'm not really surprised you aren't getting many answers. Cheers, OdyX -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/9575760.FJjgp76Vrn@gyllingar
Re: LZ4 decompression on Boot
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 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/54512bf3.20...@ulukai.org
