Re: x86.git: mtrr trimming removes all memory under kvm

view
thread

!MAILaRCHIVE_VOTE_RePLACE

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

[view in full thread]

From: H. Peter Anvin <hpa@...>

To: Jeremy Fitzhardinge <jeremy@...>

Cc: Yinghai Lu <Yinghai.Lu@...>, Ingo Molnar <mingo@...>, Linux Kernel Mailing List <linux-kernel@...>

Subject: Re: x86.git: mtrr trimming removes all memory under kvm

Date: Thursday, January 24, 2008 - 9:49 pm

Jeremy Fitzhardinge wrote:
quoted text> When booting a current x86.git kernel under kvm, I get this:
> 
> (qemu) Linux version 2.6.24-rc8 (jeremy@ezr) (gcc version 4.1.2 20070925 
> (Red Hat 4.1.2-33)) #1928 SMP PREEMPT Thu Jan 24 17:09:04 PST 2008
> early_ioremap_init()
> BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 000000001fff0000 (usable)
> BIOS-e820: 000000001fff0000 - 0000000020000000 (ACPI data)
> BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
> console [earlyser0] enabled
> 0MB HIGHMEM available.
> 511MB LOWMEM available.
> Scan SMP from c0000000 for 1024 bytes.
> Scan SMP from c009fc00 for 1024 bytes.
> Scan SMP from c00f0000 for 65536 bytes.
> Scan SMP from c009fc00 for 1024 bytes.
> ***************
> **** WARNING: likely BIOS bug
> **** MTRRs don't cover all of memory, trimmed 131056 pages
> ***************

Looks like the code doesn't check that the CPU *has* MTRRs...

	-hpa
--
unsubscribe noticeTo unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:

x86.git: mtrr trimming removes all memory under kvm, Jeremy Fitzhardinge, (Thu Jan 24, 9:44 pm)

Re: x86.git: mtrr trimming removes all memory under kvm, H. Peter Anvin, (Thu Jan 24, 9:49 pm)

[PATCH] x86: trim ram need to check if mtrr is there v2, Yinghai Lu, (Thu Jan 24, 11:47 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, Jeremy Fitzhardinge, (Fri Jan 25, 3:43 am)

[PATCH] x86: trim ram need to check if mtrr is there v3, Yinghai Lu, (Fri Jan 25, 4:42 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 10:21 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Andi Kleen, (Fri Jan 25, 10:57 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 11:10 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, H. Peter Anvin, (Fri Jan 25, 11:57 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 7:09 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 2:59 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 3:02 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 2:55 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Yinghai Lu, (Fri Jan 25, 3:19 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 3:04 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 2:59 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 3:01 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 3:04 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 3:27 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Yinghai Lu, (Fri Jan 25, 3:32 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Jeremy Fitzhardinge, (Fri Jan 25, 3:39 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v3, Ingo Molnar, (Fri Jan 25, 3:30 pm)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, Yinghai Lu, (Fri Jan 25, 4:13 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, Ingo Molnar, (Fri Jan 25, 7:12 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, H. Peter Anvin, (Fri Jan 25, 11:47 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, Yinghai Lu, (Fri Jan 25, 4:39 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, H. Peter Anvin, (Fri Jan 25, 1:44 am)

Re: [PATCH] x86: trim ram need to check if mtrr is there v2, Yinghai Lu, (Fri Jan 25, 3:50 am)

Re: x86.git: mtrr trimming removes all memory under kvm, Yinghai Lu, (Thu Jan 24, 10:32 pm)

Re: x86.git: mtrr trimming removes all memory under kvm, Andi Kleen, (Fri Jan 25, 6:52 am)

Re: x86.git: mtrr trimming removes all memory under kvm, Yinghai Lu, (Thu Jan 24, 10:21 pm)

Navigation

Popular discussions


linux-kernel:
Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
Greg Kroah-Hartman	[PATCH 004/196] Chinese: add translation of SubmittingPatches
Artem Bityutskiy	[PATCH 18/44 take 2] [UBI] build unit implementation
James Morris	Re: LSM conversion to static interface
git:

linux-netdev:
Paul Jackson	[PATCH] cpuset sched_load_balance kmalloc fix
Gerrit Renker	[PATCH 15/37] dccp: Set per-connection CCIDs via socket options
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
Linus Torvalds	Re: [GIT]: Networking
openbsd-misc:

Colocation donated by: