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-rw-r--r--Documentation/sysctl/vm.txt25
-rw-r--r--include/linux/hugetlb.h1
-rw-r--r--kernel/sysctl.c7
-rw-r--r--mm/hugetlb.c4
4 files changed, 1 insertions, 36 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index 5025ff9307e6..ff234d229cbb 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -30,7 +30,6 @@ Currently, these files are in /proc/sys/vm:
- dirty_writeback_centisecs
- drop_caches
- extfrag_threshold
-- hugepages_treat_as_movable
- hugetlb_shm_group
- laptop_mode
- legacy_va_layout
@@ -261,30 +260,6 @@ any throttling.
==============================================================
-hugepages_treat_as_movable
-
-This parameter controls whether we can allocate hugepages from ZONE_MOVABLE
-or not. If set to non-zero, hugepages can be allocated from ZONE_MOVABLE.
-ZONE_MOVABLE is created when kernel boot parameter kernelcore= is specified,
-so this parameter has no effect if used without kernelcore=.
-
-Hugepage migration is now available in some situations which depend on the
-architecture and/or the hugepage size. If a hugepage supports migration,
-allocation from ZONE_MOVABLE is always enabled for the hugepage regardless
-of the value of this parameter.
-IOW, this parameter affects only non-migratable hugepages.
-
-Assuming that hugepages are not migratable in your system, one usecase of
-this parameter is that users can make hugepage pool more extensible by
-enabling the allocation from ZONE_MOVABLE. This is because on ZONE_MOVABLE
-page reclaim/migration/compaction work more and you can get contiguous
-memory more likely. Note that using ZONE_MOVABLE for non-migratable
-hugepages can do harm to other features like memory hotremove (because
-memory hotremove expects that memory blocks on ZONE_MOVABLE are always
-removable,) so it's a trade-off responsible for the users.
-
-==============================================================
-
hugetlb_shm_group
hugetlb_shm_group contains group id that is allowed to create SysV
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 82a25880714a..6fcf140188d0 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -129,7 +129,6 @@ u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm,
pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud);
-extern int hugepages_treat_as_movable;
extern int sysctl_hugetlb_shm_group;
extern struct list_head huge_boot_pages;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 557d46728577..2fb4e27c636a 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1374,13 +1374,6 @@ static struct ctl_table vm_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
- .procname = "hugepages_treat_as_movable",
- .data = &hugepages_treat_as_movable,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
{
.procname = "nr_overcommit_hugepages",
.data = NULL,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 1e6a5ad0d420..4137fb67cd79 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -36,8 +36,6 @@
#include <linux/userfaultfd_k.h>
#include "internal.h"
-int hugepages_treat_as_movable;
-
int hugetlb_max_hstate __read_mostly;
unsigned int default_hstate_idx;
struct hstate hstates[HUGE_MAX_HSTATE];
@@ -926,7 +924,7 @@ retry_cpuset:
/* Movability of hugepages depends on migration support. */
static inline gfp_t htlb_alloc_mask(struct hstate *h)
{
- if (hugepages_treat_as_movable || hugepage_migration_supported(h))
+ if (hugepage_migration_supported(h))
return GFP_HIGHUSER_MOVABLE;
else
return GFP_HIGHUSER;