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Re: [Qemu-devel] [PATCH] Fix segfault with ram_size > 4095M without kvm

From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH] Fix segfault with ram_size > 4095M without kvm
Date: Tue, 23 Feb 2010 21:30:58 +0100

On 23.02.2010, at 18:02, Aurelien Jarno wrote:

> Ryan Harper a écrit :
>> Currently, x86_64-softmmu qemu segfaults when trying to use > 4095M memsize.
>> This patch adds a simple check and error message (much like the 2047 limit on
>> 32-bit hosts) on ram_size in the control path after we determine we're
>> not using kvm
>> Upstream qemu-kvm is affected if using the -no-kvm option; this patch address
>> the segfault there as well.
> It looks like workarounding the real bug. At some point both
> i386-softmmu (via PAE) and x86_64-softmmu were able to support > 4GB of
> memory. I remember adding the support long time ago, and testing it with
> 32GB of emulated RAM.

Sounds like a perfect candidate for -stable then. For HEAD I agree that finding 
the cause would be the way to go.


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