linux-kernel - Re: Warning from free_init

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Message-ID: <7AF2AE75-2F14-4581-B83F-DBAD6F99B8A7@zytor.com>
Date:   Sun, 25 Sep 2016 23:45:57 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Sitsofe Wheeler <sitsofe@...il.com>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Warning from free_init_pages with large initrd

On September 25, 2016 11:22:04 PM PDT, Sitsofe Wheeler <sitsofe@...il.com> wrote:
>On 26 September 2016 at 03:14, H. Peter Anvin <hpa@...or.com> wrote:
>> On 09/24/16 08:32, Sitsofe Wheeler wrote:
>>>
>>> While trying to PXE boot a Fedora LiveISO on VMware ESXi the kernel
>>> throws the following warning:
>>>
>> [...]
>>>
>>> The initrd is big because it holds all the files in the ISO (see
>>> https://fedorahosted.org/cobbler/wiki/HowToPxeAnyLiveCd for how it
>was
>>> made). The issue was originally filed on
>>> https://bugzilla.redhat.com/show_bug.cgi?id=1274966 but was usually
>>> against older kernels...
>>
>> How big is big?
>
>The one that matches that backtrace is 1385 Mbytes and was made from a
>Fedora rawhide ISO. Here are some sizes in megabytes from different
>versions of Fedora:
>960   20/initrd0.img
>1416 21/initrd0.img
>1379 22/initrd0.img
>1430 23/initrd0.img
>1492 24/initrd.img

And they all fail?

Also, is this BIOS or EFI?

When loading under BIOS there is currently a 2 GB limit with most loaders; it would have been 4 GB except that Grub had a bug (sigh.)
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