From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.222.182 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793110528; b=j7rqlIyhoQOuBNl/V8X3s7BXpU1wBV8RTBFnC5PgTb/eF8oKrhQd/LlCJJe1ArBN6w23 v4q70mprZ5QvihgUwvaHGIgqu9A7yzhEEijaQsqHrYbt0fGZF7BrrnvrxDLh3Wded52M2 CSnSSa9SFZEpEz2V828vaWgekNF63hB4fSK4BTnCfg0xLSGim63wHvYudt62gN2rkMGkS dpHyYxGs7kcZKDrx3oDXpswchGegnacNQd8lfENl4hN6v44ub1nUq9Rggpzint5HYxu7W HF9yy+eZni0ZV6PZ1mFlUOvS8iF40+n01OjLGuiy89mYRrXH0r1dHG+XaSkrM9dKBtg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793110528; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: Received:Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; bh=zUsMbjO3gCQtUvLruyRuDb07/mulBS+KPR/B4sl8JQg=; b=wfIriLpmLEzOOisgyEOdvqYUUuCa5yPliQZHI/0NC3e4bUpWErQoC1M3wtSy0NpwTxuk 7TQ+C1zPjH16CcuElf6gjHC8qBuf3LW2DQODu6Nt4z4CMIuLa+Kqmvb7gAEBfJNya7yqv VVl6l8O5vG2/7/CrdzdRv5RzxIyMu4EyzdD1gRCC5R0wJKOjZRLNyl8a8ahgLZmBqYmVF 3l/MXqXXSM7R88mB4f02aj+Fn+S8OuaHA+jTq9sguqZCjyIH8u/3u2HeBa0uJd9eochDo qWvipUuLxFOkCurRngkAq0sQu0porLbG1d52nT79YfGhmbcyU3Eb+ph59aM4v0awl5Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass header.d=ziepe.ca header.i=@ziepe.ca header.a=rsa-sha256 header.s=google header.b=Be4xWtvF; arc=none smtp.remote-ip=209.85.222.182 Received: from mail-qk1-f182.google.com (mail-qk1-f182.google.com [209.85.222.182]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAC3D606A31E for ; Tue, 27 Oct 2026 14:15:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org AAC3D606A31E Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=ziepe.ca header.i=@ziepe.ca header.a=rsa-sha256 header.s=google header.b=Be4xWtvF Received: by mail-qk1-f182.google.com with SMTP id af79cd13be357-93f3c89594cso280686885a.2 for ; Tue, 27 Oct 2026 07:15:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1793110526; x=1793715326; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=zUsMbjO3gCQtUvLruyRuDb07/mulBS+KPR/B4sl8JQg=; b=Be4xWtvF6zD3vHFfarAJm9xvRSujoQ4ZcjWYGMVUL72IZdQIrglRXya7nu1BUbTDL4 JU5H5uRGbpfBgIl70sNPb7M5LjoH0JVWDiWYrd5p4dA1OYCaMa+eIU/FSQPzPq322pXW 3BIOxxgck38BNY71yNhw4SSAeSgx6JinXx3Zn9yaso3wr//ChfahhDpgNLVyEjzAUE4O dAZ29PJibsBSyXgYh9LfzzRTLPKUcXDHhi6ZnUGansAH2HGrRy8Pnu4yfMUh815lcwdA ly/eGdf5n5xPlK639WdhZJDZBQmI4py6CAaKCrpKXNlKtynHB1yPt8pqrUeP1VSUuNAQ Z3bQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793110526; x=1793715326; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=zUsMbjO3gCQtUvLruyRuDb07/mulBS+KPR/B4sl8JQg=; b=EZRreV6bItJ2nN1k2KByMx0idYs6NueTIvvvDRec+s2FSjJPuXIRrJBG3IGQPlCYSf +RttUKagiAWlhu6BcUeRn1t06/gfJs0zWdTa8UXURjGqEXB1DznzIULbSJtSlZo8c+b2 XaiHhyb5oq7b7mNWbIr40IEBfEZq+3MDKxuBCbEZ6bPVAs13JLjuBqTitvEU84D7s41H VnQwcIqICKzGHK4iSiX3DlcTEkPG1cMrHG9U7BQ1XUBJpag7ORQKttptmYQvu3y1hXUp jky/7Wd4JLnY2nGQjk438Vm9YVVsXTUZZ04HrcBShIegIOUumht3a/wr2hXQ/pW0WS99 iVOg== X-Forwarded-Encrypted: i=1; AKwUvBwVjYeuOUTTdOa5MKbWkHSkey+UYtwPVgbhc15yKyfew2BviKr1anHbjRqPsKglcMGlg9yHudv3WLA=@vger.kernel.org X-Gm-Message-State: AFq9FYJbyylO50pry6EwnixEDvMsvzTuPOxryOHEZTz8Dr3E7rDsnDpB nr6IBsQcgrjsbXUdKrtSHz6U7yIrhxbH9UtW4SJ4TU1h8Ow8W2AieoJylJ2Rlur4FQE= X-Gm-Gg: AYBFou3jzjBdz4oSQd6WjhWXpbdMm8R5mY6ATkLvcIkt7WDg+Kw2P3253zx/+FhRt8t YN60qXBhWt4IZkR3VTMlzrz+tLI0///gvIr03MUpfR9IrEbEuYmvQ53IAcYUwXeabM26BhJde3e ppgLFlUEOQj1nYDdjJFPApyzFiMec5JRGgPaXr5JF7Ankk6T5AKMGu9SS4liHpn42g2eclNXyYu scD9K5fLweLBpSz+uOpgMuqQVTjXh0E8EIOVY9XVws1EID3GgFYfSKGO1Sw2glfRsEMpji8BxU4 qKL12dR66uJI+JwccWFwFmfAq2kj14eQjd+eMo/coV6tUKS+XAlTuIgPQTzEKp/nUia1rSijwGa zienjA4j5iJpH04qcPmj6SJKDrf9/kG2a6xcRvE+8Mylhh+b46HElLUTtVebnOnAsbT672uxd6G FaqQ3RiIRY5fbJDetCnzbdjHGlvBUAAXzpeQFZENiI3d9RhWiwiHLRGgJMdLNgU1Ica6M8xqzJ+ 55SdD68rvtEEfaqZ7hHi/dG+TpZ1qVPt+/6rEfb3Pn+nrshgBw4PyqqVrSrJYj6a0cHe9hDzjCd Tldjlc21qTIQOCW7MNs05yXqSjj7xEcNunGnqA== X-Received: by 2002:a05:620a:261e:b0:93f:d27:c89e with SMTP id af79cd13be357-940ef9d6997mr1602321285a.75.1793110526435; Tue, 27 Oct 2026 07:15:26 -0700 (PDT) Received: from ziepe.ca (hlfxns010zw-159-2-239-150.pppoe-dynamic.high-speed.ns.bellaliant.net. [159.2.239.150]) by smtp.gmail.com with ESMTPSA id af79cd13be357-940f0787d96sm982932985a.28.2026.10.27.07.15.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Oct 2026 07:15:25 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1xLhxU-00000009zYJ-422J; Tue, 27 Oct 2026 11:15:24 -0300 Date: Tue, 27 Oct 2026 11:15:24 -0300 From: Jason Gunthorpe To: Jiri Pirko Cc: Yeoreum Yun , linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, david.quigley@intel.com, lukas@wunner.de, ksinyuk@kernel.org, rodrigo.vivi@intel.com, cedric.xing@intel.com, sameo@meta.com, drdeeglaze@gmail.com, James.Bottomley@hansenpartnership.com, aik@amd.com, jpiotrowski@nvidia.com, qinkun@google.com, pgonda@google.com, jic23@kernel.org, alistair.francis@wdc.com, ankita@nvidia.com, suzuki.poulose@arm.com, kas@kernel.org, rick.p.edgecombe@intel.com, elena.reshetova@intel.com, dave.hansen@linux.intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, peter.fang@intel.com Subject: Re: [PATCH RFC 02/20] ctlv: Add the UAPI wire format and family API Message-ID: <20261027141524.GF1685504@ziepe.ca> References: <20261015145053.3664509-1-jiri@resnulli.us> <20261015145053.3664509-3-jiri@resnulli.us> X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Oct 27, 2026 at 09:02:14AM +0100, Jiri Pirko wrote: > Mon, Oct 26, 2026 at 07:55:12PM +0100, yeoreum.yun@arm.com wrote: > >[ 3.856919] ctlv_schema_check_attr+0x3dc/0x538 > >[ 3.857105] ctlv_schema_check_indexed_nest+0x788/0x958 > >[ 3.857301] ctlv_schema_validate+0x88/0x180 > >[ 3.857482] ctlv_msg_test_as_deep_as_the_core_allows+0x11c/0x1e8 > >[ 3.857698] kunit_try_run_case+0x64/0x188 > >[ 3.857878] kunit_generic_run_threadfn_adapter+0x30/0x68 > >[ 3.858086] kthread+0x10c/0x140 > >[ 3.858245] ret_from_fork+0x10/0x20 > >[ 3.858398] SMP: stopping secondary CPUs > >[ 3.858630] Kernel Offset: disabled > >[ 3.858720] CPU features: 0x0,00000000,00b0802e,9f190bc3,2affe72f > >[ 3.858872] Memory Limit: none > >[ 3.858976] ---[ end Kernel panic - not syncing: kernel stack overflow ]--- > > > >[...] > > > >I think it might be good to configurable according to architecture > >unless it's not good to reduce the CTLV_MAX_NEST_DEPTH number > >otherwise, increasing stack size when CTLV is enabled seems unresonable... > > Agreed, will lower it down. I think we should be okay with 8 for start. I'm surprised this ran out of stack though with even as few as 32 levels.. Is there accidently something large on the stack? Jason