From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: Guest start issue on ARM (maybe related to Credit2) [Was: Re: [xen-unstable test] 113807: regressions - FAIL] Date: Tue, 26 Sep 2017 09:33:46 +0200 Message-ID: <1506411226.27663.28.camel@citrix.com> References: <1506348460.27663.3.camel@citrix.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7116369289156405961==" Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall , osstest service owner , xen-devel@lists.xensource.com Cc: Stefano Stabellini List-Id: xen-devel@lists.xenproject.org --===============7116369289156405961== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="=-0bKe+FUqcq4f2XFxH6b7" --=-0bKe+FUqcq4f2XFxH6b7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2017-09-25 at 17:23 +0100, Julien Grall wrote: > On 09/25/2017 03:07 PM, Dario Faggioli wrote: > > I don't see much in the logs, TBH, but both `xl vcpu-list' and the > > 'r' > > debug key seem to suggest that vCPU 0 is running, while the other > > vCPUs > > have never run... like it was an issue with secondary (v)CPU > > bringup. > >=20 > > It indeed shows up with Credit2, as it were _specific_ to it, but > > I'm > > not 100% sure. In fact, it indeed seems to never show up here: > > http://logs.test-lab.xenproject.org/osstest/results/history/test-ar > > mhf- > > armhf-xl/xen-unstable > >=20 > Most of the time guest-start/debian.repeat fails, vCPU 0 is in=C2=A0 > data/prefetch abort state. My guess is a latent cache bug that > credit2=C2=A0 > appears to expose. >=20 So, forgive my ARM ignorance, but how do you tell that the vCPU(s) is(are) in that particular state? I'm asking because I now wonder whether this same issue could also be the cause of these other failures, which we see from time to time: flight 113816 xen-unstable real [real] http://logs.test-lab.xenproject.org/osstest/logs/113816/ [...] Tests which did not succeed, but are not blocking: test-armhf-armhf-xl-rtds 16 guest-start/debian.repeat fail blocked in = 113387 Here's the logs: http://logs.test-lab.xenproject.org/osstest/logs/113816/test-armhf-armhf-xl= -rtds/info.html Thanks and Regards, Dario --=20 <> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) --=-0bKe+FUqcq4f2XFxH6b7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJZygLaAAoJEBZCeImluHPu3IoQAI3PX0O+s0EP+rRrtuWB7Ijo Uno/KlyRiocXKlXUIXLECGiB06iqBINVeQ5gm9vrG3C/dkOnoqN4j+BsmFP9xClW WviBlBuciILpTVhtCe0xhJ+WSVUQVY0XzxJ69+KlXQrPJAd/hszoodA4h2nCYIoL 7uoIdM2G9GeXfabI2IrR6ltvC2zDQcnb9DhXHT8+ufyFkY5LHUggBQNMNiC82apm 8KW6q/KzfkJiSW8TGque/utHocXvdh10N+LkDvQzSWBtaLfaz/xNo+YQn/37SyiG c931+kf7AzX7EHi0K0n6ZFFfvbkNJhdMDPk0+MACL2eqLWfgie8DjVAwRx9Z2weT CwO9ZmKI2SSvQmPxXe922SMFMRsUJfRHV6GWfQx2yeXsX74yoFv8Kw45ut/NnSlu D/YQyZ/MEh4cbZ/+NnT+cf76ZlzvILqwDDOYu7mS8K1KwsmZbELuoXS3dIUMB3wB fKVvfc3srdJtZSI++V6Muf0ZciONVf36ZVRRxuONWjRnYRuFmJ9IAIP0PrBXS6PZ OOQhVIQnPzaXeXEtUaxhSuV95ck2tzimOG2T5MleE1hkM2AVutAbbytdrRP3QAtr SNDgIcffjnIaDplhLwTf9CtTt5jvWvSyLmPud7eH+RbHGs7FgGM3l2GX4C9Fm1kC ol/8D/uqu+Ga3y5Q2B3R =nW0N -----END PGP SIGNATURE----- --=-0bKe+FUqcq4f2XFxH6b7-- --===============7116369289156405961== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg== --===============7116369289156405961==--