On Fri, 11 Mar 2022 at 02:39, Dave Jones wrote:
> On Thu, Mar 10, 2022 at 12:10:39PM +0100, Julian Andres Klode wrote:
> >On Wed, Mar 09, 2022 at 01:24:55PM +, Dave Jones wrote:
> [snip]
> >> Firstly I actually think lz4 -2 is probably the ideal level for that
> >> compressor. There's a
On Thu, Mar 10, 2022 at 12:10:39PM +0100, Julian Andres Klode wrote:
On Wed, Mar 09, 2022 at 01:24:55PM +, Dave Jones wrote:
[snip]
Firstly I actually think lz4 -2 is probably the ideal level for that
compressor. There's a large difference in compression performance
between lz4 -1 and lz4
On Wed, Mar 09, 2022 at 01:24:55PM +, Dave Jones wrote:
> Hi Michael (and others),
>
> Julian's summarised this near perfectly, but I'll try and add a little
> detail from the data I've gathered [1] (with others' generous help, in
> particular Heinrich for the RISC-V bits):
>
> On Wed, Mar
On Thu, 10 Mar 2022 at 02:24, Dave Jones wrote:
> Hi Michael (and others),
>
> Julian's summarised this near perfectly, but I'll try and add a little
> detail from the data I've gathered [1] (with others' generous help, in
> particular Heinrich for the RISC-V bits):
>
> On Wed, Mar 09, 2022 at
Hi Michael (and others),
Julian's summarised this near perfectly, but I'll try and add a little
detail from the data I've gathered [1] (with others' generous help, in
particular Heinrich for the RISC-V bits):
On Wed, Mar 09, 2022 at 09:46:19AM +0100, Julian Andres Klode wrote:
On Wed, Mar
On Wed, 9 Mar 2022, Julian Andres Klode wrote:
> On Wed, Mar 09, 2022 at 02:10:57PM +1300, Michael Hudson-Doyle wrote:
> > On Thu, 9 Dec 2021 at 06:13, Julian Andres Klode
> >
> > wrote:
> > > changed from lz4 -9 to zstd -19. This caused significant problems:
> > change to initramfs-tools to
On Wed, Mar 09, 2022 at 02:10:57PM +1300, Michael Hudson-Doyle wrote:
> On Thu, 9 Dec 2021 at 06:13, Julian Andres Klode
> wrote:
>
> > Hi all,
> >
> > some time ago, the default compressor for initramfs was changed
> > from lz4 -9 to zstd -19. This caused significant problems:
> >
>
> Exactly
On Thu, 9 Dec 2021 at 06:13, Julian Andres Klode
wrote:
> Hi all,
>
> some time ago, the default compressor for initramfs was changed
> from lz4 -9 to zstd -19. This caused significant problems:
>
Exactly three months later... we still haven't taken any action on this.
Time to do something!
I
On Wed, Jan 26, 2022 at 4:18 PM Robie Basak wrote:
>
> It was noted in ubuntu-devel-discuss@ that changing the compression
> method impacts Xen's use of pygrub. I thought that was worth mentioning
> in this thread as something worth considering when making any decision.
Agreed
>
>
It was noted in ubuntu-devel-discuss@ that changing the compression
method impacts Xen's use of pygrub. I thought that was worth mentioning
in this thread as something worth considering when making any decision.
https://lists.ubuntu.com/archives/ubuntu-devel-discuss/2022-January/019165.html
hi,
Am Donnerstag, dem 09.12.2021 um 08:51 +0200 schrieb Mark Shuttleworth:
> On 08/12/2021 23:02, Julian Andres Klode wrote:
> > I'd kind of like us to ship "default" initramfs in like
> > linux-initrd-$uname-r
> > and linux-initrd-generic and so on. Maybe even signed somehow so
> > that
> > the
On 08/12/2021 23:02, Julian Andres Klode wrote:
I'd kind of like us to ship "default" initramfs in like
linux-initrd-$uname-r
and linux-initrd-generic and so on. Maybe even signed somehow so that
the kernel can verify its integrity when booting. Such that booting with
authenticated FDE is fully
On Wed, 8 Dec 2021, 17:13 Julian Andres Klode,
wrote:
> Hi all,
>
> some time ago, the default compressor for initramfs was changed
> from lz4 -9 to zstd -19. This caused significant problems:
>
> - it is very slow
> - it uses a lot of memory
>
> The former is a problem for everyone, the latter
Firstly, many thanks for Julian for starting this thread; I've had far
too much fun delving back into some SQL+jupyter notebooks today while
gathering a bit more info on this...
If you just want to go see or play with the data (and possibly expand it
with some more samples; I'd love to see
Thanks for raising this discussion, Julian!
On Wed, Dec 08, 2021 at 06:12:43PM +0100, Julian Andres Klode wrote:
> ## Adaptive compression
> zstd also supports adaptive compression, compressing as hard as
> it can while not impacting I/O speed. So hardware with slow I/O
> like a Pi would
On Thu, 9 Dec 2021 at 10:02, Julian Andres Klode
wrote:
> On Thu, Dec 09, 2021 at 09:21:35AM +1300, Michael Hudson-Doyle wrote:
> > On Thu, 9 Dec 2021 at 08:52, Julian Andres Klode <
> julian.kl...@canonical.com>
> > wrote:
> >
> > > The most interesting solution would be to create the cpip
On Thu, Dec 09, 2021 at 09:21:35AM +1300, Michael Hudson-Doyle wrote:
> On Thu, 9 Dec 2021 at 08:52, Julian Andres Klode
> wrote:
>
> > The most interesting solution would be to create the cpip archive
> > dynamically by giving cpio a list of files over a pipe that we create
> > dynamically in
On Thu, 9 Dec 2021 at 08:52, Julian Andres Klode
wrote:
> The most interesting solution would be to create the cpip archive
> dynamically by giving cpio a list of files over a pipe that we create
> dynamically in the hooks as we copy files in, then pipe that to zstd
> --adapt; then it would all
On 12/8/21 09:12, Julian Andres Klode wrote:
Hi all,
some time ago, the default compressor for initramfs was changed
from lz4 -9 to zstd -19. This caused significant problems:
- it is very slow
- it uses a lot of memory
The former is a problem for everyone, the latter means that
zstd just
On Wed, Dec 08, 2021 at 09:51:44AM -0800, Heinrich Schuchardt wrote:
> The memory should only be one factor to be taken into account. The SiFive
> Unmatched and the RPi 4 boards both have 8 GiB but slow CPUs. It would be
> advisable to use a lower compression level on these.
The Pi 4 is limited
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