From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HT8MD-0005pE-JU for user-mode-linux-devel@lists.sourceforge.net; Sun, 18 Mar 2007 20:16:25 -0700 Received: from mail153.messagelabs.com ([216.82.253.51]) by mail.sourceforge.net with smtp (Exim 4.44) id 1HT8MD-0008Du-9D for user-mode-linux-devel@lists.sourceforge.net; Sun, 18 Mar 2007 20:16:25 -0700 Received: from il06exr02.mot.com (il06exr02.mot.com [129.188.137.132]) by motgate8.mot.com (8.12.11/Motorola) with ESMTP id l2J3GNS6026088 for ; Sun, 18 Mar 2007 20:16:23 -0700 (MST) Received: from ZMY16EXM67.ds.mot.com (zmy16exm67.ap.mot.com [10.179.4.27]) by il06exr02.mot.com (8.13.1/8.13.0) with ESMTP id l2J3GMdn028523 for ; Sun, 18 Mar 2007 22:16:23 -0500 (CDT) Content-class: urn:content-classes:message MIME-Version: 1.0 Date: Mon, 19 Mar 2007 11:16:38 +0800 Message-ID: <0A01463223B8164194908CAC85B66A1201AD3E65@ZMY16EXM67.ds.mot.com> From: "Krishnappa Abhijith-A21204" Subject: [uml-devel] Regarding Kernel mode in UML process. List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0000731827==" Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: user-mode-linux-devel@lists.sourceforge.net This is a multi-part message in MIME format. --===============0000731827== Content-class: urn:content-classes:message Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C769D4.F7F339C5" This is a multi-part message in MIME format. ------_=_NextPart_001_01C769D4.F7F339C5 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, 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. Is there any other way that UML process executes in kernel mode. ? 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 ? =20 =20 Thanks, Abhi ------_=_NextPart_001_01C769D4.F7F339C5 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

= Regarding=20 Kernel mode in UML process. This question is on UML TT = mode

A UML=20 process wil be in Kernel mode only for executing the getpid(), and also = some=20 signals is a UML specified stack.

Is there=20 any other way that UML process executes in kernel mode. = ?

Also when=20 UML process enters the KERNEL by the means described above the tracing = is turned=20 off, this is done for performance issues only right = ?

Thanks,

Abhi

------_=_NextPart_001_01C769D4.F7F339C5-- --===============0000731827== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV --===============0000731827== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel --===============0000731827==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HTLxR-0006iH-3t for user-mode-linux-devel@lists.sourceforge.net; Mon, 19 Mar 2007 10:47:45 -0700 Received: from saraswathi.solana.com ([198.99.130.12]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1HTLxN-0001Wb-VO for user-mode-linux-devel@lists.sourceforge.net; Mon, 19 Mar 2007 10:47:42 -0700 Date: Mon, 19 Mar 2007 13:45:37 -0400 From: Jeff Dike Message-ID: <20070319174537.GD11790@c2.user-mode-linux.org> References: <0A01463223B8164194908CAC85B66A1201AD3E65@ZMY16EXM67.ds.mot.com> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <0A01463223B8164194908CAC85B66A1201AD3E65@ZMY16EXM67.ds.mot.com> Subject: Re: [uml-devel] Regarding Kernel mode in UML process. List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Krishnappa Abhijith-A21204 Cc: user-mode-linux-devel@lists.sourceforge.net 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 ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel