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_massena@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_massena@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.tedro@gmail.com> :
> > > ------------------ Début du message d'origine
> > --------------------
> > >
> > > On 29 Oct 2014 10:29, "Andre Massena"
> > > <andre_massena@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
> > > >
> > > >
> > >
> >
>
--------------------------------------------------------------------------------
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> > > >
> > >
> > > My guess is that your version/variant of grub (or lilo)
> > > doesn't understand
> > > lz4.
> > >
> > > ------------------- Fin du message d'origine
> > ---------------------
> >
> >
> >
> >
> >
>
--------------------------------------------------------------------------------
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> > ------------------- Fin du message d'origine
> ---------------------
>
>
>
>
>
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> ------------------- Fin du message d'origine ---------------------
--------------------------------------------------------------------------------
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