From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joanna Rutkowska Subject: DomU lockups after resume from S3 on Core i5 processors Date: Mon, 05 Jul 2010 12:38:33 +0200 Message-ID: <4C31B629.7070601@invisiblethingslab.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0158408020==" Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============0158408020== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigB77F259BA1C713E95ECECB91" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigB77F259BA1C713E95ECECB91 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I'm experiencing very reproducible DomU lockups that occur after I resume the system from an S3 sleep. Strangely this seem to happen only on my Core i5 systems (tested on two different machines), but not on older Core 2 Duo systems. Usually this causes the apps (e.g. Firefox) running in DomUs to become unresponsive, but sometimes I see that some very limited functionality of the app is still available (e.g. I can open/close Tabs in Firefox, but cannot do much anything more). Also, when I log in to the DomU via xm console, I usually can see the login prompt, can enter the username, but then the console hangs. I tried to attach to such a hanged DomU using gdbserver-xen, but when I subsequently try to attach to the server from gdb (via the target 127.0.0.1:9999 command), my gdb segfaults (how funny!). I'm running Xen 3.4.3, and fairly recent pvops0 kernel in DomU. In Dom0 I run 2.6.34-xenlinux kernel (opensuse patches), but I doubt it is relevant in any way. This seems like a scheduling problem, and, because it seems to affect Core i5 processors, but not Core 2 Duos, it might have something to do with Hyperthreading perhaps? joanna. --------------enigB77F259BA1C713E95ECECB91 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iEYEARECAAYFAkwxtikACgkQORdkotfEW846KgCgmiQNw6EeB343pX8Ayfs+IvdV EiEAn0o6huVRJBSwuPGbLBYHdnoMDHLR =nCgX -----END PGP SIGNATURE----- --------------enigB77F259BA1C713E95ECECB91-- --===============0158408020== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel --===============0158408020==--