[SOLVED] 'e820 too many entries' during boot

Starfall · 2012-08-20 19:31:38

I'm receiving the below messages whilst booting:

[    0.000000] e820: too many entries; ignoring [mem 0x78f2c000-0x78f32fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f33000-0x78f41fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f42000-0x78f42fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f43000-0x78f5bfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f5c000-0x78f5cfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f5d000-0x78f62fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f63000-0x78f66fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f67000-0x78f6dfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f6e000-0x78f6ffff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f70000-0x78f70fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f71000-0x78f73fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f74000-0x78f74fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f75000-0x78f79fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f7a000-0x78f7bfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f7c000-0x78f7efff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f7f000-0x78f7ffff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f80000-0x78f81fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f82000-0x78f82fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f83000-0x78f83fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f84000-0x78f85fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f86000-0x78f87fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f88000-0x78f89fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f8a000-0x78f8bfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f8c000-0x78f94fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f95000-0x78f95fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f96000-0x78f97fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f98000-0x78f98fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f99000-0x78f99fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f9a000-0x78f9dfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f9e000-0x78f9efff]
[    0.000000] e820: too many entries; ignoring [mem 0x78f9f000-0x78fa4fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fa5000-0x78fa5fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fa6000-0x78fa6fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fa7000-0x78fadfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fae000-0x78fb1fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fb2000-0x78fb3fff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fb4000-0x78fbafff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fbb000-0x78fbbfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fbc000-0x78fbdfff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fbe000-0x78fbefff]
[    0.000000] e820: too many entries; ignoring [mem 0x78fbf000-0x78feffff]
[    0.000000] e820: too many entries; ignoring [mem 0x78ff0000-0x79002fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79003000-0x79048fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79049000-0x7905cfff]
[    0.000000] e820: too many entries; ignoring [mem 0x7905d000-0x7905dfff]
[    0.000000] e820: too many entries; ignoring [mem 0x7905e000-0x79060fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79061000-0x7907cfff]
[    0.000000] e820: too many entries; ignoring [mem 0x7907d000-0x79081fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79082000-0x7909ffff]
[    0.000000] e820: too many entries; ignoring [mem 0x790a0000-0x790b6fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790b7000-0x790b7fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790b8000-0x790b8fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790b9000-0x790b9fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790ba000-0x790bafff]
[    0.000000] e820: too many entries; ignoring [mem 0x790bb000-0x790bbfff]
[    0.000000] e820: too many entries; ignoring [mem 0x790bc000-0x790c6fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790c7000-0x790c9fff]
[    0.000000] e820: too many entries; ignoring [mem 0x790ca000-0x790cdfff]
[    0.000000] e820: too many entries; ignoring [mem 0x790ce000-0x794eefff]
[    0.000000] e820: too many entries; ignoring [mem 0x794ef000-0x794f3fff]
[    0.000000] e820: too many entries; ignoring [mem 0x794f4000-0x794f4fff]
[    0.000000] e820: too many entries; ignoring [mem 0x794f5000-0x794f6fff]
[    0.000000] e820: too many entries; ignoring [mem 0x794f7000-0x794f7fff]
[    0.000000] e820: too many entries; ignoring [mem 0x794f8000-0x794fafff]
[    0.000000] e820: too many entries; ignoring [mem 0x794fb000-0x794fbfff]
[    0.000000] e820: too many entries; ignoring [mem 0x794fc000-0x79508fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79509000-0x7950afff]
[    0.000000] e820: too many entries; ignoring [mem 0x7950b000-0x79517fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79518000-0x79518fff]
[    0.000000] e820: too many entries; ignoring [mem 0x79519000-0x7951bfff]
[    0.000000] e820: too many entries; ignoring [mem 0x7951c000-0x7951dfff]
[    0.000000] e820: too many entries; ignoring [mem 0x7951e000-0x7951efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7951f000-0x7a50efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a50f000-0x7a533fff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a534000-0x7a55efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a55f000-0x7a56efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a56f000-0x7a58efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a58f000-0x7a633fff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a634000-0x7a68efff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a68f000-0x7a6d1fff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a6d2000-0x7a6fefff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a6ff000-0x7a799fff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a79a000-0x7a7a1fff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a7a2000-0x7a7fefff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a7ff000-0x7a7fffff]
[    0.000000] e820: too many entries; ignoring [mem 0x100000000-0x1005fffff]
[    0.000000] e820: too many entries; ignoring [mem 0x000a0000-0x000fffff]
[    0.000000] e820: too many entries; ignoring [mem 0x7a800000-0x7f1fffff]
[    0.000000] e820: too many entries; ignoring [mem 0xe00f8000-0xe00f8fff]
[    0.000000] e820: too many entries; ignoring [mem 0xfed1c000-0xfed1ffff]
[    0.000000] e820: too many entries; ignoring [mem 0xffed0000-0xffefffff]

I only started seeing these messages after updating my kernel. I compile the linux-ck kernel from the AUR.

They appear after the kernel is bootstrapped and right before KMS loads (I have it set to start right at the beginning of the boot process).

As far as I can tell, this doesn't look like it's affecting anything, I'd just like to know what it is in case it is a potential issue.

Many thanks in advance for any advice on this.

**EDIT**

I don't seem to receive these messages when booting the normal core kernel.

(Also, in case it matters, I'm using the BFQ patchset for BFS as my standard scheduler)

**EDIT 2 (Resolution)**

Well this was a short lived post!

I simply removed 'add_efi_memmap' from my kernel's boot line and it solved it

Last edited by Starfall (2012-08-20 20:30:52)

Evanlec · 2019-06-05 02:57:59

I saw this error also, after updating to the latest normal, vanilla Arch linux kernel package Linux arch64 5.1.6-arch1-1-ARCH #1 SMP PREEMPT Fri May 31 15:17:53 UTC 2019 x86_64 GNU/Linux.

Removing add_efi_memmap from my kernel boot line also made these messages go away.

Not entirely sure what the add_efi_memmap boot switch even does to begin with, I just read about it on the Arch wiki (I think anyway).

Anyway, thank you @Starfall for posting the solution.

Last edited by Evanlec (2019-06-05 03:00:44)

jasonwryan · 2019-06-05 07:51:15

Don't necrobump. Especially seven year old solved threads: https://wiki.archlinux.org/index.php/Co … bumping.22

Closing

Arch Linux

#1 2012-08-20 19:31:38

[SOLVED] 'e820 too many entries' during boot

#2 2019-06-05 02:57:59

Re: [SOLVED] 'e820 too many entries' during boot

#3 2019-06-05 07:51:15

Re: [SOLVED] 'e820 too many entries' during boot

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