From: "Moger, Babu" <bmoger@amd.com>
To: Fenghua Yu <fenghua.yu@intel.com>,
Babu Moger <babu.moger@amd.com>,
reinette.chatre@intel.com
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
corbet@lwn.net, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, eranian@google.com,
peternewman@google.com
Subject: Re: [RFC v2 PATCH 7/7] x86/resctrl: Add debug files when mounted with debug option
Date: Fri, 17 Feb 2023 11:49:45 -0600 [thread overview]
Message-ID: <6ccc32b9-8cfe-e5b1-7ffb-b8335bbdadbf@amd.com> (raw)
In-Reply-To: <6713e2e9-827d-8f3d-0923-a03b6b072383@intel.com>
Hi Fenghua,
On 2/16/2023 7:50 PM, Fenghua Yu wrote:
> Hi, Babu,
>
> On 2/2/23 13:47, Babu Moger wrote:
>> Add the debug files to the resctrl hierarchy.
>>
>> Signed-off-by: Babu Moger <babu.moger@amd.com>
>> ---
>> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 27
>> +++++++++++++++++++++++++++
>> 1 file changed, 27 insertions(+)
>>
>> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> index c35d91b04de6..b7c72b011264 100644
>> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> @@ -2398,6 +2398,31 @@ static int mkdir_mondata_all(struct
>> kernfs_node *parent_kn,
>> struct rdtgroup *prgrp,
>> struct kernfs_node **mon_data_kn);
>> +void resctrl_add_debug_file(struct kernfs_node *parent_kn,
>> + const char *config, unsigned long fflags,
>> + bool debug)
>> +{
>> + struct rftype *rft;
>> +
>> + rft = rdtgroup_get_rftype_by_name(config);
>> + if (debug && rft) {
>> + rft->fflags |= fflags;
>> + rdtgroup_add_file(parent_kn, rft);
>> + } else if (rft) {
>> + rft->fflags &= ~fflags;
>> + kernfs_remove_by_name(parent_kn, config);
>> + }
>> +}
>> +
>> +static void resctrl_add_debug_files(bool debug)
>> +{
>> + resctrl_add_debug_file(rdtgroup_default.kn, "rmid",
>> + RFTYPE_BASE, debug);
>> + resctrl_add_debug_file(rdtgroup_default.kn, "closid",
>> + RFTYPE_BASE_CTRL, debug);
>> + kernfs_activate(rdtgroup_default.kn);
>> +}
>> +
>> static int rdt_enable_ctx(struct rdt_fs_context *ctx)
>> {
>> int ret = 0;
>> @@ -2411,6 +2436,8 @@ static int rdt_enable_ctx(struct rdt_fs_context
>> *ctx)
>> if (!ret && ctx->enable_mba_mbps)
>> ret = set_mba_sc(true);
>> > + resctrl_add_debug_files(ctx->debug);
>
> It's better to change to:
> + if (ctx->debug)
> + resctrl_add_debug_files();
>
> Then the functions in the call chain can remove 'debug' parameter and
> can be simpler.
Actually, debug parameter is required in the resctrl_add_debug_file to
delete the file if it was mounted with debug option last time.
Thanks
Babu
next prev parent reply other threads:[~2023-02-17 17:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-02 21:46 [RFC v2 PATCH 0/7] x86/resctrl: Miscellaneous resctrl features Babu Moger
2023-02-02 21:46 ` [RFC v2 PATCH 1/7] x86/resctrl: Add multiple tasks to the resctrl group at once Babu Moger
2023-02-16 22:27 ` Fenghua Yu
2023-02-17 15:05 ` Moger, Babu
2023-02-02 21:47 ` [RFC v2 PATCH 2/7] x86/resctrl: Remove few unnecessary rftype flags Babu Moger
2023-02-02 21:47 ` [RFC v2 PATCH 3/7] x86/resctrl: Rename rftype flags for consistency Babu Moger
2023-02-02 21:47 ` [RFC v2 PATCH 4/7] x86/resctrl: Re-arrange RFTYPE flags based on hierarchy Babu Moger
2023-02-02 21:47 ` [RFC v2 PATCH 5/7] x86/resctrl: Introduce -o debug mount option Babu Moger
2023-02-17 1:42 ` Fenghua Yu
2023-02-17 17:29 ` Moger, Babu
2023-02-02 21:47 ` [RFC v2 PATCH 6/7] x86/resctrl: Display the RMID and COSID for resctrl groups Babu Moger
2023-02-17 1:46 ` Fenghua Yu
2023-02-17 17:39 ` Moger, Babu
2023-02-02 21:47 ` [RFC v2 PATCH 7/7] x86/resctrl: Add debug files when mounted with debug option Babu Moger
2023-02-17 1:50 ` Fenghua Yu
2023-02-17 17:49 ` Moger, Babu [this message]
2023-02-16 18:05 ` [RFC v2 PATCH 0/7] x86/resctrl: Miscellaneous resctrl features Moger, Babu
2023-02-16 22:13 ` Reinette Chatre
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