From nobody Wed Sep 18 17:19:31 2024 X-Original-To: net@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 4X85436Vpjz5X61p for ; Wed, 18 Sep 2024 17:19:31 +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 "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4X85435JnPz4Zbc for ; Wed, 18 Sep 2024 17:19:31 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1726679971; a=rsa-sha256; cv=none; b=uixPShREPS2Q14cTy1vF5tgAWdVnpwrFeUCANwvvpYn851JA+33z579ZiP+pCkz3rrex9L VlF4bHYaxM3ZwurA7K7QimGdffsU5C+iOaKwrAk3sEoWygBSG66pkmyNjI9n2nMgQZAuVo mS1F7L2z9NKQJnOSLSn4owFXAFEz4rPzcmWxPQKgfbJttMOXHGkpH/qvBQRLZpWqIVMapI vFaivW0CQzVtKEM7Zqa4pGYzTt4uJ5dXH54VgRasJ/qKUuKBIJWUAV2DYKUGMKDIbFgvSA PGFrAF/u5rQL60ALkQ7UKIAukPz+KJ+dRx7Ue53VCzsK2gzCfPfvWVCTZC1rbw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1726679971; 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=09iQ2kx4cBSSftcu6kZcLfngBi09+PcF0IYYHbNVFOo=; b=w6UDHRZQUILEF5sVDm492HjGTQ8yobMLS7wfOeCpLuxF4xzwBD3jM1NmiEBJc0pXiAsOVr /SbDJYjaXwesYlLFHfTweDY1PW0Nui+kt1l3iAMBvNE7AX+FuzWBcP8ZPFixLSHnlUYH4b WOp1kbuyKoHxhUBJtDioNPB5TziF2BFjGbFnyIToe79UUgqpxOvOa4IoV0C4H//8vuoEWK MiUgP4uZr7cv5e5A1fUqjO5Hrrwz+dCxeM7E8VTLmQkb7JcafBq7+x9c1I6UNtLEEnMIjm 9LlBWuUYJlj+0zvX3cty4l9t1uwBHJENZ+PKv0ICxbYGyxFLIUSkOa4gYl7xOg== 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 4X85434fpQzWj0 for ; Wed, 18 Sep 2024 17:19:31 +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 48IHJVGE023609 for ; Wed, 18 Sep 2024 17:19:31 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 48IHJVuC023608 for net@FreeBSD.org; Wed, 18 Sep 2024 17:19:31 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: net@FreeBSD.org Subject: [Bug 281560] gve (4) uma deadlock during high tcp throughput Date: Wed, 18 Sep 2024 17:19:31 +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: 14.1-RELEASE X-Bugzilla-Keywords: vendor X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: shailend@google.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@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: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281560 --- Comment #2 from shailend@google.com --- Actually I did run it with INVARIANTS and WITNESS and other options listed = on https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/#kernelde= bug-deadlocks and the deadlock reproduces without any findings from INVARIANTS or WITNESS= .=20=20 `procstat -k ${tid?}` is the only only tool I know to look at the deadlocked threads and that hints at some locking issue in the uma zone cache (as per = the per-thread procstat -k in comment #0).=20=20 Are there some other ways I can look at the locked threads and more definitively figure out what resource they are blocked on and who owns it? --=20 You are receiving this mail because: You are the assignee for the bug.=