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Re: [Xen-devel] Is: x86: mm: Fix vmalloc_fault oops during lazy MMU updates Was: Re: [PATCH] mm/x86: Flush lazy MMU when DEBUG_PAGEALLOC is set
- To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- From: Borislav Petkov <bp@xxxxxxxxx>
- Date: Thu, 28 Feb 2013 17:32:39 +0100
- Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, jwboyer@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, tglx@xxxxxxxxxxxxx, samu.kallio@xxxxxxxxxxxxxxxxx, kraman@xxxxxxxxxx
- Delivery-date: Thu, 28 Feb 2013 16:33:25 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
- Mail-followup-to: Borislav Petkov <bp@xxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, mingo@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, samu.kallio@xxxxxxxxxxxxxxxxx, kraman@xxxxxxxxxx, jwboyer@xxxxxxxxxx
On Thu, Feb 28, 2013 at 11:27:23AM -0500, Boris Ostrovsky wrote:
> What was the suggestion exactly? I don't remember seeing that message.
Use the paravirt patching facility to replace arch_flush_lazy_mmu_mode()
with a nop when running on baremetal. I.e., the whole functionality
around apply_paravirt() et al.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
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