From nobody Tue Aug 15 16:28:16 2023 X-Original-To: current@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 4RQGsc0HhTz4q6gK for ; Tue, 15 Aug 2023 16:28:20 +0000 (UTC) (envelope-from des@freebsd.org) Received: from smtp.freebsd.org (smtp.freebsd.org [IPv6:2610:1c1:1:606c::24b:4]) (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 "smtp.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4RQGsb6hWTz4YC3; Tue, 15 Aug 2023 16:28:19 +0000 (UTC) (envelope-from des@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1692116899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jRtDWPpIi6kkPs0rwWJezA33BWxKmdWsbe9eRz+wSmA=; b=f6ChVdcUAy72vRcIGP/SmfKFQcAnThrm9pgr8/EapeRMK4LyL8j5LkfXxLiAE/6b/Ct3wn NdRSH+t8iHxtWGl93DxRvidoNZbpOC63B+3OwNGrePljV/94gzfYyMmTbiy3qFTZKdVP0B pfpGSIyWPbTe46d9R/ehYTnKon//FZ/F0L71DhPbC5muj2YheMIEsc9JoD2ROzTzOdLc/i HHxddLes9FFrmX1WPainhTsa3LjTwQo0VGdc9AUzl1b5cLFqgtVEDAes8H8elN9YvyjqKQ gt9qojelakE33z6zwvfLRpIFsBFo680Rc5U+1bAq9kHSFUVberpHeTooEaeewA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1692116899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jRtDWPpIi6kkPs0rwWJezA33BWxKmdWsbe9eRz+wSmA=; b=Ips0oCGZVjH/rUg6R8njlcMCizIgdol6kuKqh4gZMjXuuJ35dYvIvKv69+aZMJU60KFOg2 1RyoZaxxvu4kBk5LbqbC0/O3RPa/tNdkCrlXWoZq1ZIPqwo0duYClwmtXw3LJX/C+oWN0r Iau3q91dOPNwFLws6JyOUu0PC83wFKNR+VpVMr4/UBnWCCaNxUCsEXRZECNf3FRzT42Xiq 9/izjZZHF18B3llkiONn/Ttv3mN4wFEPF6NzgvK7k7VvMTnbh0IskjLu5yxpcFV+5U6A0S IIETb1l2R8YI/cY/M/qEzwtiOOcEbS8fIlqAhBNA/cRXoMwEW/MONZf7lnfVQA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1692116899; a=rsa-sha256; cv=none; b=YyrGi+VtE3uSENlQ01KsnY5fb90bbr9bGyz5r4jbC8oj92gmQ2diZ8YzuBnn+/jYEnEIAZ qrizSqZKcj9/vfP7PGQ+/4eDDE3EpJyLar4Y+CZQ8E/eKl15NJH1OF96RGAiBXRvyT4s61 FbqMWuEYZBbUs7IAhII+khdJQqIzkEqWbgW8p1H0Jj89fX//kYYmSpyxLMT75vGkZRD/Fx pi+l9aLQodSiV9ip5V0EwH2iWn1ciAdDFa3Xhe7+iUZ2jJuQHOhvcBC4ozvE4hLk++ErVR zHG8N5wSwgXM1egAxSTYzzfJOyjdZyHJWHTnbSZQGo47uw2jipufr9LjaI3rwQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from ltc.des.no (ti0187a400-1976.bb.online.no [85.166.95.197]) (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) (Authenticated sender: des) by smtp.freebsd.org (Postfix) with ESMTPSA id 4RQGsb3s53zv9n; Tue, 15 Aug 2023 16:28:19 +0000 (UTC) (envelope-from des@freebsd.org) Received: by ltc.des.no (Postfix, from userid 1001) id 009AC18172; Tue, 15 Aug 2023 18:28:16 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Mateusz Guzik Cc: current@freebsd.org Subject: Re: ZFS deadlock in 14 In-Reply-To: (Mateusz Guzik's message of "Tue, 15 Aug 2023 18:26:19 +0200") References: <86leeltqcb.fsf@ltc.des.no> <86h6p4s64h.fsf@ltc.des.no> <86a5utrafp.fsf@ltc.des.no> <86350kqokl.fsf@ltc.des.no> <86y1icp95t.fsf@ltc.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (berkeley-unix) Date: Tue, 15 Aug 2023 18:28:16 +0200 Message-ID: <86ttt0p8wv.fsf@ltc.des.no> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mateusz Guzik writes: > Going through the list may or may not reveal other threads doing > something in the area and it very well may be they are deadlocked, > which then results in other processes hanging on them. > > Just like in your case the process reported as hung is a random victim > and whatever the real culprit is deeper. We already know the real culprit, see upthread. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@FreeBSD.org