From nobody Wed Jun 14 15:15:50 2023 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Qh8BZ1Hrjz4d3mb for ; Wed, 14 Jun 2023 15:15:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Qh8BY6m2Sz4F8B for ; Wed, 14 Jun 2023 15:15:49 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1686755749; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fZWwVsYmqURzhN9f9juNMA2752TTRX69NsVZQDYtCyU=; b=SGhbDrF1yoru3tFftu+5C+q9EeJqMS3is9UVk9kqrGGNHWEkkKebLaTK+b02WHZ5wrtcPd lBAGgPaLHbXIB9iWowe4Uw1mUwBTZMQGPIdZ9na6gdntk1vaTENMIYncC6fJ9n/pMT7DC9 b3GePPyr3sWpv9uCXTThRZg8X3rdq0J76H2Xqv9+p+nuejt90XElZss5omy7PQMuG0irDJ oLkI6NXuOmSei1TnhHwTj3Vvklm9LBrjreAeleIY3Pp556d3Fp1JsZc3aPakNXjGO5J1K0 wEqeGnudrkvdkUBAesewFLXS9u7IC9fGgc+nPOdmNaWYujGswQRzhazZ5OilrA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1686755749; a=rsa-sha256; cv=none; b=UAb0JeWaMbiiStPinTnhDie3rQe3Q8mpOXroL8zmQ/imkRaSCKxsJ/pZOQVWXdjGGAZmXh zV9urvIwWoql2kSZl7EhB0/Vw00QhTUzTawRW/54fotONI6WGoqhMkK7Az8DhvmNoHTXkm 5bAe2iO/GFzu88hsRjsGrymDSfRyX2AszSMsxT4lJG9SqLbLzv7vYwlg3CSJT70XQrup64 o+/kdMS5z4PCN8K0rxIe4rUC/aD8qY15fmw7VYMX+SDrzINlUpGBssxYhePYfTKq75oP5W K2ei2mDMmc5pe6bqynvgcc8PcfeFhu18s7roDPGuEWcuKbtj8ivAKrsIEGYWlw== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4Qh8BY5ldwz180Y for ; Wed, 14 Jun 2023 15:15:49 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 35EFFnRT014367 for ; Wed, 14 Jun 2023 15:15:49 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 35EFFnKv014366 for bugs@FreeBSD.org; Wed, 14 Jun 2023 15:15:49 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 271983] mi_switch hang in KVM on Sapphire Rapids running NET_EPOCH_DRAIN_CALLBACKS Date: Wed, 14 Jun 2023 15:15:50 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: rcm@rcm.sh X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D271983 --- Comment #10 from R. Christian McDonald --- I discovered today that it is possible to reproduce this bug on non-Sapphire Rapids systems. The difference being the use of the legacy vs modern virtio-rng.=20 The legacy virtio-rng doesn't exhibit this problem, it's the modern virtio-= rng that does. I tested on a non-Sapphire Rapids PVE host this morning and forced the virtio-rng to explicitly use the modern device (virtio-rng-pci-non-transitional) instead of the legacy (transitional) devi= ce (which is what PVE sets up by default) and the problem manifests there as w= ell. Conversely, if I explicitly use the legacy device on the Sapphire Rapids bo= x, the problem goes away there too. --=20 You are receiving this mail because: You are the assignee for the bug.=