From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3FF428C2D8; Fri, 6 Jun 2025 15:44:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749224642; cv=none; b=lGq9+UCEpGYHCS32qScp8wsTQ/h7kYkmIr4LHcgozPWWOCRCfiSg887ci+JfhFPnmTAWLtsP6fWXRFCqKpcjbJzaKFjoSJTSJhf/AanQ2KM88S7aXQh5KHrORb6XOMb15q58oxdHJ/KNswLAbKNZMJu5ZCNpsjo0Z38VyuutHT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749224642; c=relaxed/simple; bh=lB7lYnSbEiy3QlbxWlsGm9NoOotpmKsaXkCsatuLtCU=; h=Content-Type:Message-ID:Date:MIME-Version:Subject:To:Cc: References:From:In-Reply-To; b=j5MS2ph4PlloO8GF4KZCjOUw9DIiyI9H7am2oY/efr229Pa6+zTSE5gMlC8VvVylX7H0tkDDfmEYKtZmPqqeZmOev7/e71QWsmPOoSRxrrY/ZmnDITNHjRYPTKi4D9FLNVZeEDBabIO2Gn3BAhqlft8XDaY4DwBRVwIc/UROVBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=dMGAp+k5; arc=none smtp.client-ip=198.175.65.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="dMGAp+k5" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1749224641; x=1780760641; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to; bh=lB7lYnSbEiy3QlbxWlsGm9NoOotpmKsaXkCsatuLtCU=; b=dMGAp+k5q9eIA56QE3vf+mjdl1tNwg8QY8i7qtE8Xf4XpxIShrerWI6f l+BbffjZvLhPPvwVfIJP++M8m/qsqjMoqHYwsLDImZiiSvUBqmrzkoKoE rq52BzQEyQRdc4lm/XR7yR9BgyNy/QSVp/khR04BvG/nEURVWfG+3WDyx S1ppBAbDoH4tV4e9zRVOMCXvjou+7KQAU7JDEEFIXlrSQv6/TLybKdEy2 cnHJbsXB5nqTthGy5GWsCPi+4HohwdL8xHw1fZ1J7B2UU5A9dOzBStqWw 5R+zOxJZPD1wa+/0KlkbMG/1B20JDHVHdpthXD/c5WmQ/OLLDevjvJOne g==; X-CSE-ConnectionGUID: Hx6NfXDoQV2rFOW5onEi2g== X-CSE-MsgGUID: KOLghiviTI6+vjqhqKbxPA== X-IronPort-AV: E=McAfee;i="6800,10657,11456"; a="51456348" X-IronPort-AV: E=Sophos;i="6.16,215,1744095600"; d="scan'208,223";a="51456348" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jun 2025 08:44:00 -0700 X-CSE-ConnectionGUID: ENqPB+5XQGiQY/yi1cX9fQ== X-CSE-MsgGUID: AsKefRFdRIGewsNhJnZ6bg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,215,1744095600"; d="scan'208,223";a="149693365" Received: from iherna2-mobl4.amr.corp.intel.com (HELO [10.125.111.31]) ([10.125.111.31]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jun 2025 08:43:58 -0700 Content-Type: multipart/mixed; boundary="------------N9L4FQ8octb0E0gpQ8FX8oQZ" Message-ID: <6412d84a-edc3-4723-89f1-b2017fb0d1ea@intel.com> Date: Fri, 6 Jun 2025 08:43:57 -0700 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Large modules with 6.15 [was: [PATCH v4 6/6] percpu/x86: Enable strict percpu checks via named AS qualifiers] To: Jiri Slaby , Uros Bizjak Cc: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-bcachefs@vger.kernel.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, Nadav Amit , Dennis Zhou , Tejun Heo , Christoph Lameter , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Linus Torvalds , Andy Lutomirski , Brian Gerst , Peter Zijlstra , Shung-Hsi Yu , Alexei Starovoitov References: <20250127160709.80604-1-ubizjak@gmail.com> <20250127160709.80604-7-ubizjak@gmail.com> <02c00acd-9518-4371-be2c-eb63e5d11d9c@kernel.org> <9767d411-81dc-491b-b6da-419240065ffe@kernel.org> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzUVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT7CwXgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lczsFNBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABwsFfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y In-Reply-To: <9767d411-81dc-491b-b6da-419240065ffe@kernel.org> This is a multi-part message in MIME format. --------------N9L4FQ8octb0E0gpQ8FX8oQZ Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/6/25 02:17, Jiri Slaby wrote: > Given this is the second time I hit a bug with this, perhaps introduce > an EXPERIMENTAL CONFIG option, so that random users can simply disable > it if an issue occurs? Without the need of patching random userspace and > changing random kernel headers? What about something like the attached (untested) patch? That should at least get folks back to the old, universal working behavior even when using new compilers. --------------N9L4FQ8octb0E0gpQ8FX8oQZ Content-Type: text/x-patch; charset=UTF-8; name="CC_USE_TYPEOF_UNQUAL1.patch" Content-Disposition: attachment; filename="CC_USE_TYPEOF_UNQUAL1.patch" Content-Transfer-Encoding: base64 RnJvbSAwOGQ5OGI0ZmEwOGJhNzZiZTk2ZTQwNmI1M2FlNjk5NDY4NDJmNmE5IE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBEYXZlIEhhbnNlbiA8ZGF2ZS5oYW5zZW5AbGludXgu aW50ZWwuY29tPgpEYXRlOiBGcmksIDYgSnVuIDIwMjUgMDg6MzM6MjkgLTA3MDAKU3ViamVj dDogW1BBVENIXSBjb21waWxlci5oOiBFbmFibGUgY29uZmlnIGNob2ljZSBmb3IgdXNpbmcg dW5xdWFsaWZpZWQgY2FzdHMKClRZUEVPRl9VTlFVQUwoKSBoYXMgYSBub2JsZSBnb2FsIG9m IGxldHRpbmcgbm9ybWFsIGNvbXBpbGVycyBkbyBtb3JlCm9mIHRoZSBqb2Igbm9ybWFsbHkg cmVzZXJ2ZWQgZm9yIHNwYXJzZS4gQnV0IGl0IGhhcyBjYXVzZWQgKG9yCmV4cG9zZWQpIGEg bnVtYmVyIG9mIG5hc3R5IGJ1Z3MgYW5kIGlzIG5vdCBxdWl0ZSByZWFkeSBmb3IgcHJpbWUg dGltZS4KRXZlbiBuYXN0aWVyLCBzb21lIG9mIHRoZXNlIGlzc3VlcyBuZWVkIHNlcGFyYXRl IHVzZXJzcGFjZSBmaXhlcy4KClJpZ2h0IG5vdywgX190eXBlb2ZfdW5xdWFsX18gd2lsbCBi ZSB3aGVuZXZlciB0aGUgY29tcGlsZXIgc3VwcG9ydHMKaXQuIFJlc3RyaWN0IGl0IHRvIGNh c2VzIHdoZXJlIHVzZXJzIGhhdmUgb3B0ZWQgaW4gd2l0aCBhIG5ldyBLY29uZmlnCm9wdGlv bi4gVGhpcyBvcHRpb24gY2FuIGVpdGhlciBiZSByZW1vdmVkIG9yIGhhdmUgaXRzIGRlZmF1 bHQgcG9sYXJpdHkKZmxpcHBlZCB3aGVuIHVzZXJzcGFjZSBpcyB3aWRlbHkgZml4ZWQgdXAu CgpTaWduZWQtb2ZmLWJ5OiBEYXZlIEhhbnNlbiA8ZGF2ZS5oYW5zZW5AbGludXguaW50ZWwu Y29tPgotLS0KIGluY2x1ZGUvbGludXgvY29tcGlsZXIuaCB8ICAyICstCiBpbml0L0tjb25m aWcgICAgICAgICAgICAgfCAxMSArKysrKysrKysrKwogMiBmaWxlcyBjaGFuZ2VkLCAxMiBp bnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCgpkaWZmIC0tZ2l0IGEvaW5jbHVkZS9saW51 eC9jb21waWxlci5oIGIvaW5jbHVkZS9saW51eC9jb21waWxlci5oCmluZGV4IDI3NzI1ZjFh YjVhYmMuLjNlZmE5M2Y4ZWNhNjYgMTAwNjQ0Ci0tLSBhL2luY2x1ZGUvbGludXgvY29tcGls ZXIuaAorKysgYi9pbmNsdWRlL2xpbnV4L2NvbXBpbGVyLmgKQEAgLTIzMiw3ICsyMzIsNyBA QCB2b2lkIGZ0cmFjZV9saWtlbHlfdXBkYXRlKHN0cnVjdCBmdHJhY2VfbGlrZWx5X2RhdGEg KmYsIGludCB2YWwsCiAgKiBYWFg6IFJlbW92ZSB0ZXN0IGZvciBfX0NIRUNLRVJfXyBvbmNl CiAgKiBzcGFyc2UgbGVhcm5zIGFib3V0IF9fdHlwZW9mX3VucXVhbF9fKCkuCiAgKi8KLSNp ZiBDQ19IQVNfVFlQRU9GX1VOUVVBTCAmJiAhZGVmaW5lZChfX0NIRUNLRVJfXykKKyNpZiBk ZWZpbmVkKENPTkZJR19DQ19VU0VfVFlQRU9GX1VOUVVBTCkgJiYgQ0NfSEFTX1RZUEVPRl9V TlFVQUwgJiYgIWRlZmluZWQoX19DSEVDS0VSX18pCiAjIGRlZmluZSBVU0VfVFlQRU9GX1VO UVVBTCAxCiAjZW5kaWYKIApkaWZmIC0tZ2l0IGEvaW5pdC9LY29uZmlnIGIvaW5pdC9LY29u ZmlnCmluZGV4IDYzZjU5NzRiOWZhNmUuLjc0ZTVlOGQ2NDA3NTAgMTAwNjQ0Ci0tLSBhL2lu aXQvS2NvbmZpZworKysgYi9pbml0L0tjb25maWcKQEAgLTE0ODksNiArMTQ4OSwxNyBAQCBj b25maWcgQ0NfT1BUSU1JWkVfRk9SX1NJWkUKIAogZW5kY2hvaWNlCiAKK2NvbmZpZyBDQ19V U0VfVFlQRU9GX1VOUVVBTAorCWJvb2wgIlVzZSBjb21waWxlci1wcm92aWRlZCB1bnF1YWxp ZmllZCBjYXN0cyAoRVhQRVJJTUVOVEFMKSIKKwlkZXBlbmRzIG9uIEVYUEVSVAorCWhlbHAK KwkgIE5ld2VyIGNvbXBpbGVycyBoYXZlIHRoZSBhYmlsaXR5IHRvIGRvICJ1bnF1YWxpZmll ZCIgY2FzdHMgd2hpY2gKKwkgIHN0cmlwIG91dCB0eXBlIHF1YWxpZmllcnMgbGlrZSAnY29u c3QnLiBLZXJuZWwgYnVpbGRzIGNhbgorCSAgbGV2ZXJhZ2UgdGhlc2UgdG8gZG8gbW9yZSBz dHJpY3QgdHlwZSBjaGVja2luZyB3aXRoIG5vcm1hbAorCSAgY29tcGlsZXJzIGluc3RlYWQg b2YgcmVzb3J0aW5nIHRvIHVzaW5nIHNwYXJzZS4KKworCSAgSWYgdW5zdXJlLCBzYXkgTiBo ZXJlLgorCiBjb25maWcgSEFWRV9MRF9ERUFEX0NPREVfREFUQV9FTElNSU5BVElPTgogCWJv b2wKIAloZWxwCi0tIAoyLjM0LjEKCg== --------------N9L4FQ8octb0E0gpQ8FX8oQZ--