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Re: [Xen-devel] [GIT PULL] for-2.6.32/bug-fixes for 2.6.32 pvops tree.

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] [GIT PULL] for-2.6.32/bug-fixes for 2.6.32 pvops tree.
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Thu, 17 Mar 2011 16:14:29 +0000
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Thu, 17 Mar 2011, Konrad Rzeszutek Wilk wrote:
> Hey Jeremy,
> Please pull this git:
>  git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git 
> for-2.6.32/bug-fixes
> It has three bootup-fixes that have gatted 2.6.32 tree from booting on some of
> my machines:
>  - hvc_console would blow up during bootup with the irq handler hitting a
>    NULL pointer
>  - On Intel i915, if one was to use dom0_mem=1500M the "flush" page would be
>    incorrectly allocated in System RAM, and ioremap trying to use the PFN
>    instead of the MFN ending disastrously. The fix is to reserve the
>    System RAM E820 areas so the reserve API does not use it.
>  - On IBM Summit machines (I've a x3850) it would end up using the 
> native_apic_read
>    causing a blowup. Back-ported how we are guard ourselves against this in 
> 2.6.38
> All of these fixes are in 2.6.39-rc0 (or on the way). The machines that boot 
> now
> are: IBM x3850, Intel DX58SO,, and G31M-ES2L/G31M-ES2L.
> Konrad Rzeszutek Wilk (3):
>       xen/hvc: Disable probe_irq_on/off from poking the hvc-console IRQ line.
>       xen/e820: Don't mark balloon memory as E820_UNUSABLE when running as 
> guest and fix overflow.
>       xen/ioapic: Allow set_fixmap to set FIX_APIC_BASE to dummy mapping.
> Zhang, Fengzhe (1):
>       xen/setup: Inhibit resource API from using System RAM E820 gaps as PCI 
> mem gaps.
>  arch/x86/kernel/acpi/boot.c |    4 ----
>  arch/x86/xen/mmu.c          |    4 ++++
>  arch/x86/xen/setup.c        |    9 +++++++++
>  drivers/char/hvc_xen.c      |    2 ++
>  4 files changed, 15 insertions(+), 4 deletions(-)
> P.S.
> There is one more fix, which is a back-port of Stefano's patch consulting the 
> memblock
> (or e820_reserve_range) API when clearing the PMDs. That looks to be fixing 
> some folks
> builds, but I will let Stefano post that one.

I am just waiting for the upstream guys to ack my fix because I would
like to have the same fix in both trees.
I should be able to send a git pull request in the next few days.

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