From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Kiszka <jan.kiszka@web.de>
Subject: Re: [PATCH 2/2] qemu-kvm: Fix guest resetting v2
Date: Mon, 12 May 2008 13:38:58 +0200
Message-ID: <48282C52.7000706@web.de>
References: <482820C3.3050407@web.de> <48282A0F.3000908@qumranet.com>
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1292718106=="
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>,
	Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@qumranet.com>
Return-path: <kvm-devel-bounces@lists.sourceforge.net>
In-Reply-To: <48282A0F.3000908@qumranet.com>
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=kvm-devel>
List-Post: <mailto:kvm-devel@lists.sourceforge.net>
List-Help: <mailto:kvm-devel-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=subscribe>
Sender: kvm-devel-bounces@lists.sourceforge.net
Errors-To: kvm-devel-bounces@lists.sourceforge.net
List-Id: kvm.vger.kernel.org

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--===============1292718106==
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature";
	boundary="------------enigB317F9FD58C1B89E19797E5F"

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigB317F9FD58C1B89E19797E5F
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Avi Kivity wrote:
> Jan Kiszka wrote:
>> Resetting guests used to be racy, deadlock-prone, or simply broken (fo=
r
>> SMP). This patch fixes the issues, following Marcelo's suggestion to
>> consolidate the reset activity in the I/O thread. All vcpus are cleanl=
y
>> stopped before the emulated hardware is reset, and kvm_arch_cpu_reset =
is
>> introduced and invoked to ensure that non-boot cpus are put into the
>> right state on x86. Note that other arch may need to look into this
>> service as well to get SMP reset right.
>>
>>  =20
>=20
> hmm.  This means that reset is executed asynchronously of the calling c=
pu.

Nope, the calling cpu is put in stopped state after informing the I/O
thread about the reset request. We just cannot control when the request
is handled /wrt to other cpus, but that's not different from real life I
guess.

Jan


--------------enigB317F9FD58C1B89E19797E5F
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.4-svn0 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org

iD8DBQFIKCxSniDOoMHTA+kRAkWMAJ9KmcAeBoRsOKk8RkH2YjLn4OtqLACbBMcb
AQ5U3kpdHlBVriY41iwk0iQ=
=731b
-----END PGP SIGNATURE-----

--------------enigB317F9FD58C1B89E19797E5F--


--===============1292718106==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
Don't miss this year's exciting event. There's still time to save $100. 
Use priority code J8TL2D2. 
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
--===============1292718106==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
kvm-devel mailing list
kvm-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/kvm-devel

--===============1292718106==--