From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E50F3C433E9 for ; Thu, 4 Feb 2021 18:22:32 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9208C64F4D for ; Thu, 4 Feb 2021 18:22:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9208C64F4D Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.81399.150406 (Exim 4.92) (envelope-from ) id 1l7jGi-0001da-By; Thu, 04 Feb 2021 18:22:16 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 81399.150406; Thu, 04 Feb 2021 18:22:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l7jGi-0001dT-8x; Thu, 04 Feb 2021 18:22:16 +0000 Received: by outflank-mailman (input) for mailman id 81399; Thu, 04 Feb 2021 18:22:14 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l7jGg-0001dO-Fz for xen-devel@lists.xenproject.org; Thu, 04 Feb 2021 18:22:14 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 3d617343-9321-4ca4-bf83-8d19b4f65e38; Thu, 04 Feb 2021 18:22:13 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 3C3A8AE95; Thu, 4 Feb 2021 18:22:12 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 3d617343-9321-4ca4-bf83-8d19b4f65e38 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1612462932; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=mySUJzLqMMp5dhbVZgKoKySONi5gQVEHn+PHotScFBY=; b=J+8f0n1N4zmA8i9J2BVgIpZ3TERksCAZCcUonXsaDOSPbA9BT/jI8R011O9+/py8dhW3UC 68aI3RMKL0FYwJKS9q1W884OPw2yY6rDPkPUkqBloaxcObgwzi72eKRf7jmK9CRCmtjZwQ fHvNAC2MIB3fNaYCC6oSDsZBTRvh2n4= Message-ID: Subject: Re: [ANNOUNCE] Xen 4.15 - call for notification/status of significant bugs From: Dario Faggioli To: Tamas K Lengyel Cc: Ian Jackson , Committers , Xen-devel , Andrew Cooper , Jan Beulich , Julien Grall , community.manager@xenproject.org Date: Thu, 04 Feb 2021 19:22:10 +0100 In-Reply-To: References: <24600.8030.769396.165224@mariner.uk.xensource.com> <24603.58528.901884.980466@mariner.uk.xensource.com> <6d0d7181bad79259aff28351621d2ac1eeaca113.camel@suse.com> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-lW61QBr3CT5ho3U8Z+Tw" User-Agent: Evolution 3.38.3 (by Flathub.org) MIME-Version: 1.0 --=-lW61QBr3CT5ho3U8Z+Tw Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2021-02-04 at 10:00 -0500, Tamas K Lengyel wrote: > On Thu, Feb 4, 2021 at 9:21 AM Dario Faggioli > wrote: > >=20 > > On Thu, 2021-02-04 at 12:12 +0000, Ian Jackson wrote: > > > B. "scheduler broken" bugs. > >=20 > > - Null scheduler and vwfi native problem > > =20 > > https://lists.xenproject.org/archives/html/xen-devel/2021-01/msg01634.h= tml > >=20 > > =C2=A0 RCU issues, but manifests due to scheduler behavior (especially > > =C2=A0 NULL scheduler, especially on ARM). > > =C2=A0 I'm actively working on it. > >=20 > > =C2=A0 Patches that should solve the issue for ARM posted already. They > > =C2=A0 will need to be slightly adjusted to cover x86 as well. Waiting = a > > =C2=A0 couple days more for a confirmation from the reporter that the > > =C2=A0 patches do help, at least on ARM. > >=20 >=20 > I've run into null-scheduler causing CPU lockups as well on x86. > Required physical machine reboot. Seems to be triggered with domain > destruction when destroying fork vms. Happens only intermittently. >=20 Yes, we know that it's generic and not ARM-only. It's just that on ARM is easier (or I should say deterministic) to trigger it. Thanks for reporting, though. I'll add you in Cc when I send the updated version of the patches that covers x86 as well, in case you want to test. :-) Regards --=20 Dario Faggioli, Ph.D http://about.me/dario.faggioli Virtualization Software Engineer SUSE Labs, SUSE https://www.suse.com/ ------------------------------------------------------------------- <> (Raistlin Majere) --=-lW61QBr3CT5ho3U8Z+Tw Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEES5ssOj3Vhr0WPnOLFkJ4iaW4c+4FAmAcO1IACgkQFkJ4iaW4 c+7pFA/+PHla4bOzIEJy6rSwvLpSNEWzxN1RoIjMLiQgsOK6iFXe3FN2dDXAKNtE vNxT1jYtqxGdAR+FasSDLa3qmiLMDIaa4fb6ivk03AJ9Q6YlRd6PHdWqh0b816C8 iP/yMuXCYBIiAcKZURUpJgaBjLhF/3E51no8NV1NtMSa0ZhkyMsOKRy/tfHqTFdx XHaw9zNzpDSDlxzY3VhLI+H6315oUEAIesNI0qC+hed53bjuQy80d44tD9ER+r3q kaaMSNzLakE+XnpEh0AT1B/7dd/QeskAGpwqeK3ESeU0UMg5wHyoZSwAC+gO9cp0 JLEYGqx7frH93zC/OS3cVdjTs7/wtkvQJRybzrPVnCSWPCoW/5uBsxbDuiybjlQS 3xyazNnA4Hr/nZgkSTc36UktigsJz+CpovYWcGA1mFwVp6RpVl/NMyOkBCZViG2l Adv6dOyyBzMbBiuZBosBnQ0EnTZutSRYiEUjsWq7nIy2rLY9nXD0hNaJ7A+/1v6d V12mkxj2nNfWoFWRKa8UTFXevqp9GAPpcziGzmRSbHvGqNxbww6fjXkdlVRHUgsZ l/5q0fGwexiSZeBJX8vP3tXQ2jh7Z2vddVnSYY1weAmJ1JF497URzY+cHB77bIve SVzezk+OnKiyWglaCRxxjzNs+4ZAyXz14mWWgwqN7rVTOZCCnaM= =V/Wy -----END PGP SIGNATURE----- --=-lW61QBr3CT5ho3U8Z+Tw--