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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 78281CA0EED for ; Fri, 22 Aug 2025 14:40:08 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.1090221.1447559 (Exim 4.92) (envelope-from ) id 1upSve-0006yj-87; Fri, 22 Aug 2025 14:39:42 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 1090221.1447559; Fri, 22 Aug 2025 14:39:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1upSve-0006yc-4m; Fri, 22 Aug 2025 14:39:42 +0000 Received: by outflank-mailman (input) for mailman id 1090221; Fri, 22 Aug 2025 14:39:40 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1upSvc-0006yQ-Bl for xen-devel@lists.xenproject.org; Fri, 22 Aug 2025 14:39:40 +0000 Received: from fhigh-b3-smtp.messagingengine.com (fhigh-b3-smtp.messagingengine.com [202.12.124.154]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id d3fdc7a4-7f65-11f0-a32b-13f23c93f187; Fri, 22 Aug 2025 16:39:38 +0200 (CEST) Received: from phl-compute-11.internal (phl-compute-11.internal [10.202.2.51]) by mailfhigh.stl.internal (Postfix) with ESMTP id B8F7A7A0257; Fri, 22 Aug 2025 10:39:36 -0400 (EDT) Received: from phl-mailfrontend-01 ([10.202.2.162]) by phl-compute-11.internal (MEProxy); Fri, 22 Aug 2025 10:39:36 -0400 Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 22 Aug 2025 10:39:35 -0400 (EDT) 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: d3fdc7a4-7f65-11f0-a32b-13f23c93f187 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= invisiblethingslab.com; h=cc:cc:content-type:content-type:date :date:from:from:in-reply-to:message-id:mime-version:reply-to :subject:subject:to:to; s=fm3; t=1755873576; x=1755959976; bh=kd Xg7r5TeKLnxqQDTga7nMcsb3wgYffRcJfOgxqZuHI=; b=l0pzjSbnIg83PHap8/ mUVFTGIpapYWMWdN2qdEzlsAoHrnNErXGYjwQsW6qEgekUTuNL9P6z5qiZuXYiac bAFKO1XRny7H4d5qx20XGkaFnLF19ljru/QliFSRMwHctnuFU3a6LpxhbYcbR7HG s6IbxIY1jAG6CH7YnAkMIW2qErkMPHA4FD71FmIhna7kB3YyYNr7yPq1en3x3yMv HgvE06KNA9U5KFtaewPdcEKUSd1gnXNlF8bwiCWzQo51wFq8wxKroZczCf3NmAnd OmQRWIF4iusgiFzvLfKvWgqQWUAT0cZCKoZsim2RkDYQc8EFauGFYlQDgv9cJV0E 1OCA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:content-type:date:date :feedback-id:feedback-id:from:from:in-reply-to:message-id :mime-version:reply-to:subject:subject:to:to:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; t=1755873576; x= 1755959976; bh=kdXg7r5TeKLnxqQDTga7nMcsb3wgYffRcJfOgxqZuHI=; b=f oBKvsahrK3g1+hNcAuJdGgBv/UgMyY0j3YhG3foxxRf/C0G5IsDaGd1C2YVr8PpR fYqN3AqP+hoVMbI6gY+2ge0TjmFN5YjxOElNANyASjNIw3hjPLxbBZhATCOJ0nYA aUz9ccDaZQdfAr6pjIvcoslxqQp+BCaQaQnOJ4ngTpJOQDirykevE8hFKxVQEa3H GnxP130X1T3/ii66nqki7umD/8TlVVEV5iO+8svp35zvwORZ8cZG9pe00EQIo08G 08M5eRXoeT7KGya/KRurOLY0b/FP4aoB/lY3LIwFDZQ5AMfk3Up+nJZlr59Sn7Ux EO9VG1442zcMzPHYBVeNQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdefgdduieegtddvucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepfffhvfevuffkgggtugesghdtreertddtjeenucfhrhhomhepofgrrhgvkhcuofgr rhgtiiihkhhofihskhhiqdfikphrvggtkhhiuceomhgrrhhmrghrvghksehinhhvihhsih gslhgvthhhihhnghhslhgrsgdrtghomheqnecuggftrfgrthhtvghrnhepudfggfeileeu ueektdfhffelvdfhjeeffeehueeikefhleduleejjeelgeejudffnecuvehluhhsthgvrh fuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepmhgrrhhmrghrvghksehinhhv ihhsihgslhgvthhhihhnghhslhgrsgdrtghomhdpnhgspghrtghpthhtohephedpmhhoug gvpehsmhhtphhouhhtpdhrtghpthhtohepgigvnhdquggvvhgvlheslhhishhtshdrgigv nhhprhhojhgvtghtrdhorhhgpdhrtghpthhtohepjhhgrhhoshhssehsuhhsvgdrtghomh dprhgtphhtthhopehsshhtrggsvghllhhinhhisehkvghrnhgvlhdrohhrghdprhgtphht thhopeholhgvkhhsrghnughrpghthihshhgthhgvnhhkohesvghprghmrdgtohhmpdhrtg hpthhtohepsghorhhishdrohhsthhrohhvshhkhiesohhrrggtlhgvrdgtohhm X-ME-Proxy: Feedback-ID: i1568416f:Fastmail Date: Fri, 22 Aug 2025 16:39:33 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: xen-devel Cc: Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Boris Ostrovsky Subject: domU suspend issue - freeze processes failed - Linux 6.16 Message-ID: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="7NZxyHlq/zTlJ7mI" Content-Disposition: inline --7NZxyHlq/zTlJ7mI Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Date: Fri, 22 Aug 2025 16:39:33 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: xen-devel Cc: Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Boris Ostrovsky Subject: domU suspend issue - freeze processes failed - Linux 6.16 Hi, When suspending domU I get the following issue: Freezing user space processes Freezing user space processes failed after 20.004 seconds (1 tasks refu= sing to freeze, wq_busy=3D0): task:xl state:D stack:0 pid:466 tgid:466 ppid:1 = task_flags:0x400040 flags:0x00004006 Call Trace: __schedule+0x2f3/0x780 schedule+0x27/0x80 schedule_preempt_disabled+0x15/0x30 __mutex_lock.constprop.0+0x49f/0x880 unregister_xenbus_watch+0x216/0x230 xenbus_write_watch+0xb9/0x220 xenbus_file_write+0x131/0x1b0 vfs_writev+0x26c/0x3d0 ? do_writev+0xeb/0x110 do_writev+0xeb/0x110 do_syscall_64+0x84/0x2c0 ? do_syscall_64+0x200/0x2c0 ? generic_handle_irq+0x3f/0x60 ? syscall_exit_work+0x108/0x140 ? do_syscall_64+0x200/0x2c0 ? __irq_exit_rcu+0x4c/0xe0 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x79b618138642 RSP: 002b:00007fff9a192fc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00000000024fd490 RCX: 000079b618138642 RDX: 0000000000000003 RSI: 00007fff9a193120 RDI: 0000000000000014 RBP: 00007fff9a193000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 R13: 00007fff9a193120 R14: 0000000000000003 R15: 0000000000000000 OOM killer enabled. Restarting tasks: Starting Restarting tasks: Done xen:manage: do_suspend: freeze processes failed -16 The process in question is `xl devd` daemon. It's a domU serving a xenvif backend. I noticed it on 6.16.1, but looking at earlier test logs I see it with 6.16-rc6 already (but interestingly, not 6.16-rc2 yet? feels weird given seemingly no relevant changes between rc2 and rc6). --=20 Best Regards, Marek Marczykowski-G=C3=B3recki Invisible Things Lab --7NZxyHlq/zTlJ7mI Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmiogSUACgkQ24/THMrX 1yyBDQf/a5uCBB5JXsHfHfYq0z1m6pUmrF55CQ2lBlOnXJb+FDWAjfUL/1zpQRvM 0vHSZkqcPfm4RykqyPbEgShp7uUNlC9ioByTAZY0Sp+5I1S2n2Fp16QSqAxidQH/ LSx27zN5aShYdGRwd8uD1D+0fowN177q4U+Y0fievDx6EyTi98vPtYoGYxpfIp8b Pr44Ei2HiudMgZ/aii9Z0Wey5LbttFAklvsMuwpmgAt+8ftwwCuPKalPVSzt0EWr s+TRtLNzJLs4JwYYiFyax6UxsW2Ca66P4MLQHLL/9MjkF65BxvbuX9qjzZjKH5Ba k1gnNgfQRo4WfdmEqQ9/WOEZ9xDzAg== =z1Hm -----END PGP SIGNATURE----- --7NZxyHlq/zTlJ7mI--