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[Xen-devel] Re: Merge Xen (the hypervisor) into Linux
- To: dan.magenheimer@xxxxxxxxxx
- From: David Miller <davem@xxxxxxxxxxxxx>
- Date: Tue, 02 Jun 2009 21:58:02 -0700 (PDT)
- Cc: npiggin@xxxxxxx, ksrinivasan@xxxxxxxxxx, jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, tytso@xxxxxxx, wimcoekaerts@xxxxxxxxxxxx, stephen.spector@xxxxxxxxxx, george.dunlap@xxxxxxxxxxxxx, kurt.hackel@xxxxxxxxxx, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, rostedt@xxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx, Ian.Pratt@xxxxxxxxxxxxx, avi@xxxxxxxxxx, EAnderson@xxxxxxxxxx, jens.axboe@xxxxxxxxxx, mingo@xxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, gregkh@xxxxxxx, Keir.Fraser@xxxxxxxxxxxxx
- Delivery-date: Thu, 04 Jun 2009 02:46:23 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Tue, 2 Jun 2009 21:49:58 -0700 (PDT)
> A hypervisor is not an operating system.
This is a pretty bogus statement if you ask me.
A hypervisor a software system that provides seperation between
protection realms.
It also handles exceptions and "system calls" on behalf of the other
protection realms.
I personally don't see the difference at all. And since many
hypervisors even do cpu scheduling, the fundamental differences
converge to almost nothing.
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