From: Kristen Carlson Accardi <kristen@linux.intel.com>
To: jarkko@kernel.org, dave.hansen@linux.kernel.org, tj@kernel.org,
linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org,
cgroups@vger.kernel.org, Zefan Li <lizefan.x@bytedance.com>,
Johannes Weiner <hannes@cmpxchg.org>
Cc: zhiquan1.li@intel.com, Kristen Carlson Accardi <kristen@linux.intel.com>
Subject: [PATCH 18/26] cgroup/misc: Expose root_misc
Date: Fri, 11 Nov 2022 10:35:23 -0800 [thread overview]
Message-ID: <20221111183532.3676646-19-kristen@linux.intel.com> (raw)
In-Reply-To: <20221111183532.3676646-1-kristen@linux.intel.com>
The SGX driver will need to get access to the root misc_cg object
to do iterative walks and also determine if a charge will be
towards the root cgroup or not.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
---
include/linux/misc_cgroup.h | 5 +++++
kernel/cgroup/misc.c | 9 +++++++++
2 files changed, 14 insertions(+)
diff --git a/include/linux/misc_cgroup.h b/include/linux/misc_cgroup.h
index 8f1b7b6cb81d..b79c78378f17 100644
--- a/include/linux/misc_cgroup.h
+++ b/include/linux/misc_cgroup.h
@@ -59,6 +59,7 @@ struct misc_cg {
struct misc_res res[MISC_CG_RES_TYPES];
};
+struct misc_cg *root_misc(void);
unsigned long misc_cg_res_total_usage(enum misc_res_type type);
int misc_cg_set_capacity(enum misc_res_type type, unsigned long capacity);
int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg,
@@ -106,6 +107,10 @@ static inline void put_misc_cg(struct misc_cg *cg)
}
#else /* !CONFIG_CGROUP_MISC */
+static inline struct misc_cg *root_misc(void)
+{
+ return NULL;
+}
static inline unsigned long misc_cg_res_total_usage(enum misc_res_type type)
{
diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c
index 1e93e1d20347..8aa994d9cd02 100644
--- a/kernel/cgroup/misc.c
+++ b/kernel/cgroup/misc.c
@@ -45,6 +45,15 @@ static unsigned long misc_res_capacity[MISC_CG_RES_TYPES];
*/
static BLOCKING_NOTIFIER_HEAD(misc_cg_notify_list);
+/**
+ * root_misc() - Return the root misc cgroup.
+ */
+struct misc_cg *root_misc(void)
+{
+ return &root_cg;
+}
+EXPORT_SYMBOL_GPL(root_misc);
+
/**
* parent_misc() - Get the parent of the passed misc cgroup.
* @cgroup: cgroup whose parent needs to be fetched.
--
2.37.3
next prev parent reply other threads:[~2022-11-11 18:37 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 18:35 [PATCH 00/26] Add Cgroup support for SGX EPC memory Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 01/26] x86/sgx: Call cond_resched() at the end of sgx_reclaim_pages() Kristen Carlson Accardi
2022-11-15 23:27 ` Jarkko Sakkinen
2022-11-16 1:00 ` Reinette Chatre
2022-11-11 18:35 ` [PATCH 02/26] x86/sgx: Store struct sgx_encl when allocating new va pages Kristen Carlson Accardi
2022-11-15 23:31 ` Jarkko Sakkinen
2022-11-11 18:35 ` [PATCH 03/26] x86/sgx: Add 'struct sgx_epc_lru' to encapsulate lru list(s) Kristen Carlson Accardi
2022-11-15 23:35 ` Jarkko Sakkinen
2022-11-11 18:35 ` [PATCH 04/26] x86/sgx: Use sgx_epc_lru for existing active page list Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 05/26] x86/sgx: Track epc pages on reclaimable or unreclaimable lists Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 06/26] x86/sgx: Introduce RECLAIM_IN_PROGRESS flag for EPC pages Kristen Carlson Accardi
2022-11-15 23:42 ` Jarkko Sakkinen
2022-11-11 18:35 ` [PATCH 07/26] x86/sgx: Use a list to track to-be-reclaimed pages during reclaim Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 08/26] x86/sgx: Add EPC page flags to identify type of page Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 09/26] x86/sgx: Allow reclaiming up to 32 pages, but scan 16 by default Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 10/26] x86/sgx: Return the number of EPC pages that were successfully reclaimed Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 11/26] x86/sgx: Add option to ignore age of page during EPC reclaim Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 12/26] x86/sgx: Add helper to retrieve SGX EPC LRU given an EPC page Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 13/26] x86/sgx: Prepare for multiple LRUs Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 14/26] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 15/26] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 16/26] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 17/26] cgroup/misc: Add notifier block list support for css events Kristen Carlson Accardi
2022-11-14 22:42 ` Tejun Heo
2022-11-14 23:10 ` Kristen Carlson Accardi
2022-11-14 23:11 ` Tejun Heo
2022-11-14 23:17 ` Kristen Carlson Accardi
2022-11-11 18:35 ` Kristen Carlson Accardi [this message]
2022-11-14 22:19 ` [PATCH 18/26] cgroup/misc: Expose root_misc Tejun Heo
2022-11-11 18:35 ` [PATCH 19/26] cgroup/misc: Expose parent_misc() Kristen Carlson Accardi
2022-11-14 22:30 ` Tejun Heo
2022-11-11 18:35 ` [PATCH 20/26] cgroup/misc: allow users of misc cgroup to read specific cgroup usage Kristen Carlson Accardi
2022-11-14 22:31 ` Tejun Heo
2022-11-11 18:35 ` [PATCH 21/26] cgroup/misc: allow misc cgroup consumers to read the max value Kristen Carlson Accardi
2022-11-14 22:33 ` Tejun Heo
2022-11-11 18:35 ` [PATCH 22/26] cgroup/misc: Add private per cgroup data to struct misc_cg Kristen Carlson Accardi
2022-11-14 22:34 ` Tejun Heo
2022-11-11 18:35 ` [PATCH 23/26] cgroup/misc: Add tryget functionality for misc controller Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 24/26] cgroup/misc: Add SGX EPC resource type Kristen Carlson Accardi
2022-11-11 18:35 ` [PATCH 25/26] x86/sgx: Add support for misc cgroup controller Kristen Carlson Accardi
2022-11-14 22:38 ` Tejun Heo
2022-11-11 18:35 ` [PATCH 26/26] Docs/x86/sgx: Add description for cgroup support Kristen Carlson Accardi
2022-11-12 9:28 ` Bagas Sanjaya
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