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[PATCH v5 8/8] x86/resctrl: Introduce RFTYPE_DEBUG flag

Babu Moger posted 8 patches 2 years, 8 months ago
There is a newer version of this series
[PATCH v5 8/8] x86/resctrl: Introduce RFTYPE_DEBUG flag
Posted by Babu Moger 2 years, 8 months ago 
Introduce RFTYPE_DEBUG flag which can be used to add files when
resctrl is mounted with "-o debug" option. RFTYPE_DEBUG is OR'd
with other RFTYPE_ flags. These other flags decide where in resctrl
structure these files should be created.

Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 arch/x86/kernel/cpu/resctrl/internal.h |    1 +
 arch/x86/kernel/cpu/resctrl/rdtgroup.c |    5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index c07c6517d856..5bc8d371fc3e 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -294,6 +294,7 @@ struct rdtgroup {
 #define RFTYPE_TOP			BIT(6)
 #define RFTYPE_RES_CACHE		BIT(8)
 #define RFTYPE_RES_MB			BIT(9)
+#define RFTYPE_DEBUG			BIT(10)
 #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
 #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
 #define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index e03cb01c4742..9e42ecbb9063 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1862,6 +1862,7 @@ static struct rftype res_common_files[] = {
 		.mode		= 0444,
 		.kf_ops		= &rdtgroup_kf_single_ops,
 		.seq_show	= rdtgroup_rmid_show,
+		.fflags		= RFTYPE_BASE | RFTYPE_DEBUG,
 	},
 	{
 		.name		= "schemata",
@@ -1891,6 +1892,7 @@ static struct rftype res_common_files[] = {
 		.mode		= 0444,
 		.kf_ops		= &rdtgroup_kf_single_ops,
 		.seq_show	= rdtgroup_closid_show,
+		.fflags		= RFTYPE_CTRL_BASE | RFTYPE_DEBUG,
 	},
 
 };
@@ -1905,6 +1907,9 @@ static int rdtgroup_add_files(struct kernfs_node *kn, unsigned long fflags)
 
 	lockdep_assert_held(&rdtgroup_mutex);
 
+	if (resctrl_debug)
+		fflags |= RFTYPE_DEBUG;
+
 	for (rft = rfts; rft < rfts + len; rft++) {
 		if (rft->fflags && ((fflags & rft->fflags) == rft->fflags)) {
 			ret = rdtgroup_add_file(kn, rft);
Re: [PATCH v5 8/8] x86/resctrl: Introduce RFTYPE_DEBUG flag
Posted by Reinette Chatre 2 years, 7 months ago 
Hi Babu,

On 6/1/2023 12:02 PM, Babu Moger wrote:
> Introduce RFTYPE_DEBUG flag which can be used to add files when
> resctrl is mounted with "-o debug" option. RFTYPE_DEBUG is OR'd
> with other RFTYPE_ flags. These other flags decide where in resctrl
> structure these files should be created.
> 
> Signed-off-by: Babu Moger <babu.moger@amd.com>
> ---
>  arch/x86/kernel/cpu/resctrl/internal.h |    1 +
>  arch/x86/kernel/cpu/resctrl/rdtgroup.c |    5 +++++
>  2 files changed, 6 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
> index c07c6517d856..5bc8d371fc3e 100644
> --- a/arch/x86/kernel/cpu/resctrl/internal.h
> +++ b/arch/x86/kernel/cpu/resctrl/internal.h
> @@ -294,6 +294,7 @@ struct rdtgroup {
>  #define RFTYPE_TOP			BIT(6)
>  #define RFTYPE_RES_CACHE		BIT(8)
>  #define RFTYPE_RES_MB			BIT(9)
> +#define RFTYPE_DEBUG			BIT(10)
>  #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
>  #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
>  #define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> index e03cb01c4742..9e42ecbb9063 100644
> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> @@ -1862,6 +1862,7 @@ static struct rftype res_common_files[] = {
>  		.mode		= 0444,
>  		.kf_ops		= &rdtgroup_kf_single_ops,
>  		.seq_show	= rdtgroup_rmid_show,
> +		.fflags		= RFTYPE_BASE | RFTYPE_DEBUG,
>  	},
>  	{
>  		.name		= "schemata",
> @@ -1891,6 +1892,7 @@ static struct rftype res_common_files[] = {
>  		.mode		= 0444,
>  		.kf_ops		= &rdtgroup_kf_single_ops,
>  		.seq_show	= rdtgroup_closid_show,
> +		.fflags		= RFTYPE_CTRL_BASE | RFTYPE_DEBUG,
>  	},
>  
>  };
> @@ -1905,6 +1907,9 @@ static int rdtgroup_add_files(struct kernfs_node *kn, unsigned long fflags)
>  
>  	lockdep_assert_held(&rdtgroup_mutex);
>  
> +	if (resctrl_debug)
> +		fflags |= RFTYPE_DEBUG;
> +
>  	for (rft = rfts; rft < rfts + len; rft++) {
>  		if (rft->fflags && ((fflags & rft->fflags) == rft->fflags)) {
>  			ret = rdtgroup_add_file(kn, rft);
> 
> 

I think that the first and last hunk of this patch can be
squashed with patch 5. From what I can tell it would help
the motivation of patch 5 and fit nicely with what its
changelog aims to describe. The remaining hunks can be
moved to patch 6.

Reinette
Re: [PATCH v5 8/8] x86/resctrl: Introduce RFTYPE_DEBUG flag
Posted by Moger, Babu 2 years, 7 months ago 
Hi Reinette,

On 7/7/23 16:47, Reinette Chatre wrote:
> Hi Babu,
> 
> On 6/1/2023 12:02 PM, Babu Moger wrote:
>> Introduce RFTYPE_DEBUG flag which can be used to add files when
>> resctrl is mounted with "-o debug" option. RFTYPE_DEBUG is OR'd
>> with other RFTYPE_ flags. These other flags decide where in resctrl
>> structure these files should be created.
>>
>> Signed-off-by: Babu Moger <babu.moger@amd.com>
>> ---
>>  arch/x86/kernel/cpu/resctrl/internal.h |    1 +
>>  arch/x86/kernel/cpu/resctrl/rdtgroup.c |    5 +++++
>>  2 files changed, 6 insertions(+)
>>
>> diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
>> index c07c6517d856..5bc8d371fc3e 100644
>> --- a/arch/x86/kernel/cpu/resctrl/internal.h
>> +++ b/arch/x86/kernel/cpu/resctrl/internal.h
>> @@ -294,6 +294,7 @@ struct rdtgroup {
>>  #define RFTYPE_TOP			BIT(6)
>>  #define RFTYPE_RES_CACHE		BIT(8)
>>  #define RFTYPE_RES_MB			BIT(9)
>> +#define RFTYPE_DEBUG			BIT(10)
>>  #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
>>  #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
>>  #define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
>> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> index e03cb01c4742..9e42ecbb9063 100644
>> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> @@ -1862,6 +1862,7 @@ static struct rftype res_common_files[] = {
>>  		.mode		= 0444,
>>  		.kf_ops		= &rdtgroup_kf_single_ops,
>>  		.seq_show	= rdtgroup_rmid_show,
>> +		.fflags		= RFTYPE_BASE | RFTYPE_DEBUG,
>>  	},
>>  	{
>>  		.name		= "schemata",
>> @@ -1891,6 +1892,7 @@ static struct rftype res_common_files[] = {
>>  		.mode		= 0444,
>>  		.kf_ops		= &rdtgroup_kf_single_ops,
>>  		.seq_show	= rdtgroup_closid_show,
>> +		.fflags		= RFTYPE_CTRL_BASE | RFTYPE_DEBUG,
>>  	},
>>  
>>  };
>> @@ -1905,6 +1907,9 @@ static int rdtgroup_add_files(struct kernfs_node *kn, unsigned long fflags)
>>  
>>  	lockdep_assert_held(&rdtgroup_mutex);
>>  
>> +	if (resctrl_debug)
>> +		fflags |= RFTYPE_DEBUG;
>> +
>>  	for (rft = rfts; rft < rfts + len; rft++) {
>>  		if (rft->fflags && ((fflags & rft->fflags) == rft->fflags)) {
>>  			ret = rdtgroup_add_file(kn, rft);
>>
>>
> 
> I think that the first and last hunk of this patch can be
> squashed with patch 5. From what I can tell it would help
> the motivation of patch 5 and fit nicely with what its
> changelog aims to describe. The remaining hunks can be
> moved to patch 6.
Sure.. Will do.
Thanks
Babu Moger

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