From: Jeff Dike <jdike@addtoit.com>
To: Krishnappa Abhijith-A21204 <abhijith@motorola.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] Regarding Kernel mode in UML process.
Date: Mon, 19 Mar 2007 13:45:37 -0400 [thread overview]
Message-ID: <20070319174537.GD11790@c2.user-mode-linux.org> (raw)
In-Reply-To: <0A01463223B8164194908CAC85B66A1201AD3E65@ZMY16EXM67.ds.mot.com>
On Mon, Mar 19, 2007 at 11:16:38AM +0800, Krishnappa Abhijith-A21204 wrote:
> Regarding Kernel mode in UML process. This question is on UML TT
> mode
> A UML process wil be in Kernel mode only for executing the getpid(), and
> also some signals is a UML specified stack.
And whenever the UML kernel executes a system call, of which there are
many.
> Also when UML process enters the KERNEL by the means described above the
> tracing is turned off, this is done for performance issues only
> right ?
No, it's done for security. A UML process must not be allowed to
execute system calls on the host. Only the UML kernel may do that.
Jeff
--
Work email - jdike at linux dot intel dot com
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prev parent reply other threads:[~2007-03-19 17:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-19 3:16 [uml-devel] Regarding Kernel mode in UML process Krishnappa Abhijith-A21204
2007-03-19 17:45 ` Jeff Dike [this message]
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