mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol

Since 2d1c498072 ("mm: memcontrol: make swap tracking an integral part
of memory control"), CONFIG_MEMCG_SWAP hasn't been a user-visible config
option anymore, it just means CONFIG_MEMCG && CONFIG_SWAP.

Update the sites accordingly and drop the symbol.

[ While touching the docs, remove two references to CONFIG_MEMCG_KMEM,
  which hasn't been a user-visible symbol for over half a decade. ]

Link: https://lkml.kernel.org/r/20220926135704.400818-5-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2022-09-26 09:57:04 -04:00 committed by Andrew Morton
parent b94c4e949c
commit e55b9f9686
13 changed files with 10 additions and 22 deletions

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@ -299,7 +299,7 @@ Per-node-per-memcgroup LRU (cgroup's private LRU) is guarded by
lruvec->lru_lock; PG_lru bit of page->flags is cleared before
isolating a page from its LRU under lruvec->lru_lock.
2.7 Kernel Memory Extension (CONFIG_MEMCG_KMEM)
2.7 Kernel Memory Extension
-----------------------------------------------
With the Kernel memory extension, the Memory Controller is able to limit
@ -386,8 +386,6 @@ U != 0, K >= U:
a. Enable CONFIG_CGROUPS
b. Enable CONFIG_MEMCG
c. Enable CONFIG_MEMCG_SWAP (to use swap extension)
d. Enable CONFIG_MEMCG_KMEM (to use kmem extension)
3.1. Prepare the cgroups (see cgroups.txt, Why are cgroups needed?)
-------------------------------------------------------------------

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@ -9,7 +9,6 @@ CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_CGROUPS=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y

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@ -3,7 +3,6 @@ CONFIG_NO_HZ_IDLE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_BLK_CGROUP=y
CONFIG_CFS_BANDWIDTH=y
CONFIG_RT_GROUP_SCHED=y

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@ -17,7 +17,6 @@ CONFIG_LOG_CPU_MAX_BUF_SHIFT=13
CONFIG_NUMA_BALANCING=y
CONFIG_CGROUPS=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CPUSETS=y

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@ -16,7 +16,6 @@ CONFIG_LOG_CPU_MAX_BUF_SHIFT=13
CONFIG_NUMA_BALANCING=y
CONFIG_CGROUPS=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CPUSETS=y

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@ -16,7 +16,6 @@ CONFIG_CPUSETS=y
# CONFIG_PROC_PID_CPUSET is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_MEMCG=y
CONFIG_CGROUP_MEMCG_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_CGROUP=y

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@ -14,7 +14,6 @@ CONFIG_CPUSETS=y
# CONFIG_PROC_PID_CPUSET is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_MEMCG=y
CONFIG_CGROUP_MEMCG_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_DEV_INITRD=y

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@ -666,7 +666,7 @@ static inline void folio_throttle_swaprate(struct folio *folio, gfp_t gfp)
cgroup_throttle_swaprate(&folio->page, gfp);
}
#ifdef CONFIG_MEMCG_SWAP
#if defined(CONFIG_MEMCG) && defined(CONFIG_SWAP)
void mem_cgroup_swapout(struct folio *folio, swp_entry_t entry);
int __mem_cgroup_try_charge_swap(struct folio *folio, swp_entry_t entry);
static inline int mem_cgroup_try_charge_swap(struct folio *folio,

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@ -4,7 +4,7 @@
#include <linux/swap.h>
#ifdef CONFIG_MEMCG_SWAP
#if defined(CONFIG_MEMCG) && defined(CONFIG_SWAP)
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
unsigned short old, unsigned short new);
@ -40,6 +40,6 @@ static inline void swap_cgroup_swapoff(int type)
return;
}
#endif /* CONFIG_MEMCG_SWAP */
#endif
#endif /* __LINUX_SWAP_CGROUP_H */

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@ -958,11 +958,6 @@ config MEMCG
help
Provides control over the memory footprint of tasks in a cgroup.
config MEMCG_SWAP
bool
depends on MEMCG && SWAP
default y
config MEMCG_KMEM
bool
depends on MEMCG && !SLOB

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@ -98,7 +98,9 @@ obj-$(CONFIG_DEVICE_MIGRATION) += migrate_device.o
obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += huge_memory.o khugepaged.o
obj-$(CONFIG_PAGE_COUNTER) += page_counter.o
obj-$(CONFIG_MEMCG) += memcontrol.o vmpressure.o
obj-$(CONFIG_MEMCG_SWAP) += swap_cgroup.o
ifdef CONFIG_SWAP
obj-$(CONFIG_MEMCG) += swap_cgroup.o
endif
obj-$(CONFIG_CGROUP_HUGETLB) += hugetlb_cgroup.o
obj-$(CONFIG_GUP_TEST) += gup_test.o
obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o

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@ -3423,7 +3423,7 @@ void split_page_memcg(struct page *head, unsigned int nr)
css_get_many(&memcg->css, nr - 1);
}
#ifdef CONFIG_MEMCG_SWAP
#ifdef CONFIG_SWAP
/**
* mem_cgroup_move_swap_account - move swap charge and swap_cgroup's record.
* @entry: swap entry to be moved
@ -7296,7 +7296,7 @@ static int __init mem_cgroup_init(void)
}
subsys_initcall(mem_cgroup_init);
#ifdef CONFIG_MEMCG_SWAP
#ifdef CONFIG_SWAP
static struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg)
{
while (!refcount_inc_not_zero(&memcg->id.ref)) {
@ -7788,4 +7788,4 @@ static int __init mem_cgroup_swap_init(void)
}
subsys_initcall(mem_cgroup_swap_init);
#endif /* CONFIG_MEMCG_SWAP */
#endif /* CONFIG_SWAP */

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@ -4,5 +4,4 @@ CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_SCHED=y
CONFIG_MEMCG=y
CONFIG_MEMCG_KMEM=y
CONFIG_MEMCG_SWAP=y
CONFIG_PAGE_COUNTER=y