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Re: Booting a kernel inside a large file, out of memory?

From: Hanson Char
Subject: Re: Booting a kernel inside a large file, out of memory?
Date: Thu, 4 Mar 2021 19:00:04 -0800

Are you booting in UEFI mode or Legacy CSM mode?


> On Mar 4, 2021, at 6:51 AM, Sebert, Holger.ext 
> <> wrote:
> Hi!
> When booting a bzImage which is contained in a bigger file, does Grub
> load the whole file into memory or does it only load the bzImage from
> the file containing it?
> Here is some background:
> I have a file, say "myimage", which contains both a kernel (bzImage)
> and a root filesystem (squashfs). The kernel is configured in a way to
> automatically boot into that filesystem.
> I am booting the kernel inside "myimage" successfully using the
> following command:
>    linux ($root)/myimage
>    boot
> The root filesystem being contained in "myimage" is currently not huge,
> so it should fit into memory, but I am worried that this might change
> in the future and I can get an out-of-memory-condition. Therefore my
> question at the beginning of this mail.
> Thanks!
> Best,
> Holger

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