From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (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 4867422425B for ; Fri, 16 Jan 2026 08:50:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768553441; cv=none; b=mWcF+jgkSLL/5WCqaoymVjWT3Aby4fO7fTbH49Y44S5guy9we+MylpS8Qzq3Bj4gfdh9EAK8Nl9+JVQRoCOe0zsDaIzfoYtzur50oQqvPZY8KUD3Vmr5K+DQ+8671nRttEZ8+D65oiVKoVDmdw76Qgm65qTFZVtsc3udbs2Eyr8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768553441; c=relaxed/simple; bh=EtJIRZ5kQM1AmV3qKOu/PRnKgcwSV4sCMrjqXb0Xq4s=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jL6mLv1jvgDh3+NIrM0yRJN20zEAuxvDpzQKKMoiNvi+aOntPlBX9JJQhr1Dfrw5oc31X6pI7unt5Rtn0ykiw05MnDO97XmICRtOeKb4mexgE6K2miOXh9wwTkdulB3BeQH/ysA7sAq9yo6sffOlTSM5F7u9TdK9G54L02LqQN0= 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=ijhMraSk; arc=none smtp.client-ip=198.175.65.13 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="ijhMraSk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768553440; x=1800089440; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=EtJIRZ5kQM1AmV3qKOu/PRnKgcwSV4sCMrjqXb0Xq4s=; b=ijhMraSkU7SnbNwgxgrirxDR4j13SbpUeA2Qzce+1IKcHqxYXs0bstYj 2X2U7dkT5gWIateRYT4qqQcBfwmVL4cVS4h7AlXRRW8005M1KOKzuR3o7 kX4sU/kGGdfq1kcPLsOXkoV+Dy/4XuTEqB4kSBtYAqrIQVtuGtRiut+6N SsvemIOdzM2TC+lQS/ZfjVxI7IiXYJQhgFuVbZZ6znmyJEoRrGOEBk973 NoIbl/4Htbo+TFk197rqkYK6uTHMqKZzYTgrUuDQYvelwd5Sage080PeQ eYeG6qwga7axzMtjeCs9d/QH7R5hFtw2ESga6qJ8q2jXw15HQBTcrd+KI Q==; X-CSE-ConnectionGUID: CpWQOP5mQdyOVtzKM82GZQ== X-CSE-MsgGUID: nKfmHTPHTsiXxIWD1wmZhg== X-IronPort-AV: E=McAfee;i="6800,10657,11672"; a="80982145" X-IronPort-AV: E=Sophos;i="6.21,230,1763452800"; d="scan'208";a="80982145" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jan 2026 00:50:39 -0800 X-CSE-ConnectionGUID: USy2ZwdtTxuAED8Xk6nV2A== X-CSE-MsgGUID: BgdxI1+TTcCzp1xlNG4FLA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,230,1763452800"; d="scan'208";a="242741334" Received: from liuzhao-optiplex-7080.sh.intel.com (HELO localhost) ([10.239.160.39]) by orviesa001.jf.intel.com with ESMTP; 16 Jan 2026 00:50:33 -0800 Date: Fri, 16 Jan 2026 17:16:03 +0800 From: Zhao Liu To: Hao Li Cc: Vlastimil Babka , Hao Li , akpm@linux-foundation.org, harry.yoo@oracle.com, cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, tim.c.chen@intel.com, yu.c.chen@intel.com, zhao1.liu@intel.com Subject: Re: [PATCH v2] slub: keep empty main sheaf as spare in __pcs_replace_empty_main() Message-ID: References: <20251210002629.34448-1-haoli.tcs@gmail.com> <3foece42fc3wj3wgcnibi7cn2be73ancyjgrzdqfjeqvjtwkhj@lzqd572wfpvz> 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: <3foece42fc3wj3wgcnibi7cn2be73ancyjgrzdqfjeqvjtwkhj@lzqd572wfpvz> > I'd like to dig a bit deeper to confirm whether the "256 tasks" result is truly > a regression. The "256" seems align closely with the NUMA topology on my machine, so I'm unsure how it will perform on other machines. > Could you please share the original full report, or let me know > which test case under will-it-scale/ you used? I mainly followed Suneeth's steps [*]: 1) git clone https://github.com/antonblanchard/will-it-scale.git 2) git clone https://github.com/intel/lkp-tests.git 3) cd will-it-scale && git apply lkp-tests/programs/will-it-scale/pkg/will-it-scale.patch 4) make 5) python3 runtest.py mmap2 25 process 0 0 1 8 64 128 192 256 [*]: https://lore.kernel.org/all/262c742f-dc0c-4adc-b23c-047cd3298a5e@amd.com/ Sine the raw perf.data files are too big to be blocked, if you need to see any specific part of the content, I can paste the info for you. Regards, Zhao