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Re: [PATCH] btrfs: disable zstd support for i386-pc

From: Michael Chang
Subject: Re: [PATCH] btrfs: disable zstd support for i386-pc
Date: Tue, 23 Jun 2020 14:32:04 +0800
User-agent: Mutt/1.10.1 (2018-07-13)

On Mon, Jun 22, 2020 at 10:16:49PM -0400, Mike Gilbert wrote:
> On Sun, Jun 21, 2020 at 2:56 PM Eli Schwartz <> wrote:
> > But anyway this isn't true. There are valid reasons to reinstall grub on
> > old systems, in which case you are most likely not benefiting from zstd
> > support one way or another, but in this case, rerunning grub-install
> > destroys the working bootloader code and fails to replace.
> This sounds like a bug/defect in grub-install. Ideally, it would look
> at the size of the embedding area, and abort early if it is too small.
> This should happen before files are copied to /boot/grub, but
> currently it is done afterward.

Even though the system can stay bootable, it cannot receive any grub
updates afterward, thus breaking the principle of backward compatibilty
that new build couldn't run at all on an existing system running old


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