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From: Thomas Gleixner <tglx@linutronix.de>
To: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>,
	Ingo Molnar <mingo@elte.hu>, Tony Luck <tony.luck@intel.com>,
	Peter Zijlstra <peterz@infradead.org>, Tejun Heo <tj@kernel.org>,
	Borislav Petkov <bp@suse.de>,
	Stephane Eranian <eranian@google.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	David Carrillo-Cisneros <davidcc@google.com>,
	Shaohua Li <shli@fb.com>,
	Ravi V Shankar <ravi.v.shankar@intel.com>,
	Vikas Shivappa <vikas.shivappa@linux.intel.com>,
	Sai Prakhya <sai.praneeth.prakhya@intel.com>,
	linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>
Subject: Re: [PATCH v2 15/33] x86/intel_rdt: Adds support to enable Code Data Prioritization
Date: Thu, 8 Sep 2016 12:18:59 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1609081215160.5647@nanos> (raw)
In-Reply-To: <1473328647-33116-16-git-send-email-fenghua.yu@intel.com>

On Thu, 8 Sep 2016, Fenghua Yu wrote:
>  
> +struct clos_config {
> +	unsigned long *closmap;
> +	u32 max_closid;
> +	u32 closids_used;
> +};

Another badly formatted and undocumented structure

> +struct clos_config cconfig;
> +bool cdp_enabled;

Once more global variables without a declaration in a header and no user
outside of this file.

> +#define __DCBM_TABLE_INDEX(x)	(x << 1)
> +#define __ICBM_TABLE_INDEX(x)	((x << 1) + 1)
>  
>  struct rdt_remote_data {
>  	int msr;
> @@ -122,22 +123,28 @@ static int closid_alloc(u32 *closid)
>  
>  	lockdep_assert_held(&rdtgroup_mutex);
>  
> -	maxid = boot_cpu_data.x86_cache_max_closid;
> -	id = find_first_zero_bit(closmap, maxid);
> +	maxid = cconfig.max_closid;

Cute. You can remove all that code because maxid is always 0.

>  /*
>   * Set only one cpu in cpumask in all cpus that share the same cache.
>   */
> @@ -191,7 +213,7 @@ static inline bool rdt_cpumask_update(int cpu)
>   */
>  static void cbm_update_msrs(void *dummy)
>  {
> -	int maxid = boot_cpu_data.x86_cache_max_closid;
> +	int maxid = cconfig.max_closid;

Ditto

>  	size = BITS_TO_LONGS(maxid) * sizeof(long);
> -	closmap = kzalloc(size, GFP_KERNEL);
> -	if (!closmap) {
> +	cconfig.closmap = kzalloc(size, GFP_KERNEL);
> +	if (!cconfig.closmap) {

Simply because it's never initialized.

Thanks,

	tglx

  reply	other threads:[~2016-09-08 10:21 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-08  9:56 [PATCH v2 00/33] Enable Intel Resource Allocation in Resource Director Technology Fenghua Yu
2016-09-08  9:56 ` [PATCH v2 01/33] cacheinfo: Introduce cache id Fenghua Yu
2016-09-09 15:01   ` Nilay Vaish
2016-09-08  9:56 ` [PATCH v2 02/33] Documentation, ABI: Add a document entry for " Fenghua Yu
2016-09-08 19:33   ` Thomas Gleixner
2016-09-09 15:11     ` Nilay Vaish
2016-09-08  9:56 ` [PATCH v2 03/33] x86, intel_cacheinfo: Enable cache id in x86 Fenghua Yu
2016-09-08  9:56 ` [PATCH v2 04/33] drivers/base/cacheinfo.c: Export some cacheinfo functions for others to use Fenghua Yu
2016-09-08  8:21   ` Thomas Gleixner
2016-09-08  9:56 ` [PATCH v2 05/33] x86/intel_rdt: Cache Allocation documentation Fenghua Yu
2016-09-08  9:57 ` [PATCH v2 06/33] Documentation, x86: Documentation for Intel resource allocation user interface Fenghua Yu
2016-09-08 11:22   ` Borislav Petkov
2016-09-08 22:01   ` Shaohua Li
2016-09-09  1:17     ` Fenghua Yu
2016-09-08 22:45       ` Shaohua Li
2016-09-09  7:22         ` Fenghua Yu
2016-09-09 17:50           ` Shaohua Li
2016-09-09 18:03             ` Luck, Tony
2016-09-09 21:43               ` Shaohua Li
2016-09-09 21:59                 ` Luck, Tony
2016-09-10  0:36                   ` Yu, Fenghua
2016-09-12  4:15                     ` Shaohua Li
2016-09-13 13:27                       ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection Fenghua Yu
2016-09-08 11:50   ` Borislav Petkov
2016-09-08 16:53     ` Yu, Fenghua
2016-09-08 17:17       ` Borislav Petkov
2016-09-08 13:17   ` Thomas Gleixner
2016-09-08 13:59     ` Yu, Fenghua
2016-09-13 22:40   ` Dave Hansen
2016-09-13 22:52     ` Luck, Tony
2016-09-13 23:00       ` Dave Hansen
2016-09-08  9:57 ` [PATCH v2 08/33] x86/intel_rdt: Add Class of service management Fenghua Yu
2016-09-08  8:56   ` Thomas Gleixner
2016-09-12 16:02   ` Nilay Vaish
2016-09-08  9:57 ` [PATCH v2 09/33] x86/intel_rdt: Add L3 cache capacity bitmask management Fenghua Yu
2016-09-08  9:40   ` Thomas Gleixner
2016-09-12 16:10   ` Nilay Vaish
2016-09-08  9:57 ` [PATCH v2 10/33] x86/intel_rdt: Implement scheduling support for Intel RDT Fenghua Yu
2016-09-08  9:53   ` Thomas Gleixner
2016-09-15 21:36     ` Yu, Fenghua
2016-09-15 21:40       ` Luck, Tony
2016-09-13 17:55   ` Nilay Vaish
2016-09-08  9:57 ` [PATCH v2 11/33] x86/intel_rdt: Hot cpu support for Cache Allocation Fenghua Yu
2016-09-08 10:03   ` Thomas Gleixner
2016-09-13 18:18   ` Nilay Vaish
2016-09-13 19:10     ` Luck, Tony
2016-09-08  9:57 ` [PATCH v2 12/33] x86/intel_rdt: Intel haswell Cache Allocation enumeration Fenghua Yu
2016-09-08 10:08   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 13/33] Define CONFIG_INTEL_RDT Fenghua Yu
2016-09-08 10:14   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 14/33] x86/intel_rdt: Intel Code Data Prioritization detection Fenghua Yu
2016-09-08  9:57 ` [PATCH v2 15/33] x86/intel_rdt: Adds support to enable Code Data Prioritization Fenghua Yu
2016-09-08 10:18   ` Thomas Gleixner [this message]
2016-09-08  9:57 ` [PATCH v2 16/33] x86/intel_rdt: Class of service and capacity bitmask management for CDP Fenghua Yu
2016-09-08 10:29   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 17/33] x86/intel_rdt: Hot cpu update for code data prioritization Fenghua Yu
2016-09-08 10:34   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 18/33] sched.h: Add rg_list and rdtgroup in task_struct Fenghua Yu
2016-09-08 10:36   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 19/33] magic number for resctrl file system Fenghua Yu
2016-09-08 10:41   ` Thomas Gleixner
2016-09-08 10:47     ` Borislav Petkov
2016-09-08  9:57 ` [PATCH v2 20/33] x86/intel_rdt.h: Header for inter_rdt.c Fenghua Yu
2016-09-08 12:36   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 21/33] x86/intel_rdt_rdtgroup.h: Header for user interface Fenghua Yu
2016-09-08 12:44   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 22/33] x86/intel_rdt.c: Extend RDT to per cache and per resources Fenghua Yu
2016-09-08 14:57   ` Thomas Gleixner
2016-09-13 22:54   ` Dave Hansen
2016-09-08  9:57 ` [PATCH v2 23/33] x86/intel_rdt_rdtgroup.c: User interface for RDT Fenghua Yu
2016-09-08 14:59   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 24/33] x86/intel_rdt_rdtgroup.c: Create info directory Fenghua Yu
2016-09-08 16:04   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 25/33] include/linux/resctrl.h: Define fork and exit functions in a new header file Fenghua Yu
2016-09-08 16:07   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 26/33] Task fork and exit for rdtgroup Fenghua Yu
2016-09-08 19:41   ` Thomas Gleixner
2016-09-13 23:13   ` Dave Hansen
2016-09-13 23:35     ` Luck, Tony
2016-09-14 14:28       ` Dave Hansen
2016-09-08  9:57 ` [PATCH v2 27/33] x86/intel_rdt_rdtgroup.c: Implement resctrl file system commands Fenghua Yu
2016-09-08 20:09   ` Thomas Gleixner
2016-09-08 22:04   ` Shaohua Li
2016-09-09  1:23     ` Fenghua Yu
2016-09-08  9:57 ` [PATCH v2 28/33] x86/intel_rdt_rdtgroup.c: Read and write cpus Fenghua Yu
2016-09-08 20:25   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 29/33] x86/intel_rdt_rdtgroup.c: Tasks iterator and write Fenghua Yu
2016-09-08 20:50   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 30/33] x86/intel_rdt_rdtgroup.c: Process schemata input from resctrl interface Fenghua Yu
2016-09-08 22:20   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 31/33] Documentation/kernel-parameters: Add kernel parameter "resctrl" for CAT Fenghua Yu
2016-09-08 22:25   ` Thomas Gleixner
2016-09-08  9:57 ` [PATCH v2 32/33] MAINTAINERS: Add maintainer for Intel RDT resource allocation Fenghua Yu
2016-09-08  9:57 ` [PATCH v2 33/33] x86/Makefile: Build intel_rdt_rdtgroup.c Fenghua Yu
2016-09-08 23:59   ` Thomas Gleixner

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