On Tue, Jan 7, 2020 at 11:07 AM Martin Kolman <mkolman(a)redhat.com> wrote:
On Mon, 2020-01-06 at 16:35 -0800, Brian C. Lane wrote:
> On Sun, Jan 05, 2020 at 10:08:07AM -0700, Chris Murphy wrote:
> > I've pretty much concluded Fedora is best off dropping the nested ext4
> > in favor of plain squashfs, and using zstd. It's not required to do
> > both, but the benefit is additive and significant. The work in dracut
> > and lorax to support plain squashfs, assembling it using overlayfs
> > instead of device-mapper is already done, and tested.
>
> I agree with Chris here, I think we should make the switch to plain
> squashfs unless someone can come up something dramatic that it will
> break :) Tweaking the current settings would be fine if we didn't have a
> better, simpler, solution.
>
> A side note about the xz bcj compression -- in some experiments I
> noticed that enabling x86 and armthumb resulted in further reduction
> (about 400k with the default block size). My guess was due to use of ARM
> instructions in the firmware blobs.
Also does squashfs support zstd compression ?
Yes, that's what I was referring to in the first sentence quoted above.
--
Chris Murphy