From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (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 78940328621; Thu, 15 Jan 2026 21:15:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768511722; cv=none; b=hn/dRFBprjBzMGDFiteObjf+RBuS0FR2n48nsbhKFk+rbDpT/pOyBipNp9Y4dR/ZMZ1xQeDzkvaGIID4zk7NpApdkn9A/EZrWbbdLxPcq15GsMFF2cp1HkVIZLJNeJKD8ZNbSq6tIjR39kPQDgqtGBDan4LV0sKdsI7zbid9HJM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768511722; c=relaxed/simple; bh=1A+T4CJFZG1miay751yy1KYlyXw8N+muZBboZSWUttM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=eu1W9H8I63bddKm5HBG+x5R1XfJHIvE0CcXrZS83yeYwVf2jNJGxs4WwvoJFWtzZ2Ae2Bxtjrkkl4SOMzNwDVcfBeENP/ET9rgKpsSel9wtuDuhUYggIg6Lv29/PAJrFnMPMysisIyVlHzbugQ3drIVt9r0WNoGNxSSvIWmnsrE= 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=c3fypLHz; arc=none smtp.client-ip=192.198.163.11 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="c3fypLHz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768511720; x=1800047720; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=1A+T4CJFZG1miay751yy1KYlyXw8N+muZBboZSWUttM=; b=c3fypLHzPXJXF2CNz0Gg+g8MqwwYO+cuMbhpdcR5RxTP3HSgA5pMlxWP gF2mH8rOMKPr8SpeTkccMdKeBhhfisDJPn0BUj2FrOcZcJSPSCAh5u8Dt BdzF0TpdbrYuQIyP6dykRytjKu+lJ6n63xp+cwKZHk2Yvdns8aHjL2EAJ 4byOwlxCbyglBBwQsxWad8noxRbAjBeHzUjVK/pPmJhUNHWaBEvxsdCJJ /P5ft7dkcDWLNBAaS3ZKjtJFcGtbbB9IGHF6DG+cv8YCi7yCU5+JF+4/Y DFYMIdL2XneyFuEt/37S/FdfPOoWYI7mjR5kkixN6jHgEsk8chcMOTdGn g==; X-CSE-ConnectionGUID: DVDd6mI3T4i+3vcBplmC0w== X-CSE-MsgGUID: 7jodcQ3WRiuhWhk9HRhPYw== X-IronPort-AV: E=McAfee;i="6800,10657,11672"; a="80472117" X-IronPort-AV: E=Sophos;i="6.21,229,1763452800"; d="scan'208";a="80472117" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jan 2026 13:15:19 -0800 X-CSE-ConnectionGUID: eTlg1CJMQsGmMNMsaXqNIA== X-CSE-MsgGUID: UV4mjTkQR7uGcxNnXPA2WQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,229,1763452800"; d="scan'208";a="205543257" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa010.fm.intel.com with ESMTP; 15 Jan 2026 13:15:15 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vgUgT-00000000K08-1fPo; Thu, 15 Jan 2026 21:15:13 +0000 Date: Fri, 16 Jan 2026 05:14:54 +0800 From: kernel test robot To: Luigi Rizzo , Thomas Gleixner , Marc Zyngier , Luigi Rizzo , Paolo Abeni , Andrew Morton , Sean Christopherson , Jacob Pan Cc: oe-kbuild-all@lists.linux.dev, Linux Memory Management List , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Bjorn Helgaas , Willem de Bruijn Subject: Re: [PATCH v4 3/3] genirq: Adaptive Global Software Interrupt Moderation (GSIM). Message-ID: <202601160433.z2rdE9lE-lkp@intel.com> References: <20260115155942.482137-4-lrizzo@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260115155942.482137-4-lrizzo@google.com> Hi Luigi, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.19-rc5] [cannot apply to tip/irq/core next-20260115] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Luigi-Rizzo/genirq-Add-flags-for-software-interrupt-moderation/20260116-000808 base: linus/master patch link: https://lore.kernel.org/r/20260115155942.482137-4-lrizzo%40google.com patch subject: [PATCH v4 3/3] genirq: Adaptive Global Software Interrupt Moderation (GSIM). config: mips-randconfig-r051-20260116 (https://download.01.org/0day-ci/archive/20260116/202601160433.z2rdE9lE-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260116/202601160433.z2rdE9lE-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202601160433.z2rdE9lE-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/irq/irq_moderation.c:432:40: warning: overflow in expression; result is 1'410'065'408 with type 'long' [-Winteger-overflow] 432 | recent = (now - epoch_start_ns) < 10 * NSEC_PER_SEC; | ~~~^~~~~~~~~~~~~~ 1 warning generated. vim +432 kernel/irq/irq_moderation.c 410 411 /* Print statistics */ 412 static void rd_stats(struct seq_file *p) 413 { 414 ulong global_intr_rate = 0, global_irq_high = 0; 415 ulong local_irq_high = 0, hardirq_high = 0; 416 uint delay_us = irq_mod_info.delay_us; 417 u64 now = ktime_get_ns(); 418 int cpu, active_cpus = 0; 419 420 seq_printf(p, HEAD_FMT, 421 "# CPU", "irq/s", "loc_irq/s", "cpus", "delay_ns", 422 "irq_hi", "loc_irq_hi", "hardirq_hi", "timer_set", 423 "enqueue", "stray_irq"); 424 425 for_each_possible_cpu(cpu) { 426 struct irq_mod_state cur, *m = per_cpu_ptr(&irq_mod_state, cpu); 427 u64 epoch_start_ns; 428 bool recent; 429 430 /* Accumulate and print only recent samples */ 431 epoch_start_ns = atomic64_read(&m->epoch_start_ns); > 432 recent = (now - epoch_start_ns) < 10 * NSEC_PER_SEC; 433 434 /* Copy statistics, will only use some 32bit values, races ok. */ 435 data_race(cur = *per_cpu_ptr(&irq_mod_state, cpu)); 436 if (recent) { 437 active_cpus++; 438 global_intr_rate += cur.global_intr_rate; 439 } 440 441 global_irq_high += cur.global_irq_high; 442 local_irq_high += cur.local_irq_high; 443 hardirq_high += cur.hardirq_high; 444 445 seq_printf(p, BODY_FMT, 446 cpu, 447 recent * cur.global_intr_rate, 448 recent * cur.local_intr_rate, 449 recent * (cur.scaled_cpu_count + 128) / 256, 450 recent * cur.mod_ns, 451 cur.global_irq_high, 452 cur.local_irq_high, 453 cur.hardirq_high, 454 cur.timer_set, 455 cur.enqueue, 456 cur.stray_irq); 457 } 458 459 seq_printf(p, "\n" 460 "enabled %s\n" 461 "delay_us %u\n" 462 "target_intr_rate %u\n" 463 "hardirq_percent %u\n" 464 "update_ms %u\n" 465 "scale_cpus %u\n", 466 str_yes_no(delay_us > 0), 467 delay_us, 468 irq_mod_info.target_intr_rate, irq_mod_info.hardirq_percent, 469 irq_mod_info.update_ms, irq_mod_info.scale_cpus); 470 471 seq_printf(p, 472 "intr_rate %lu\n" 473 "irq_high %lu\n" 474 "my_irq_high %lu\n" 475 "hardirq_percent_high %lu\n" 476 "total_interrupts %u\n" 477 "total_cpus %u\n", 478 active_cpus ? global_intr_rate / active_cpus : 0, 479 global_irq_high, local_irq_high, hardirq_high, 480 READ_ONCE(*((u32 *)&irq_mod_info.total_intrs)), 481 READ_ONCE(*((u32 *)&irq_mod_info.total_cpus))); 482 } 483 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki