hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I6XOIE CVE: NA
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To support dynamic hugetlb on arm64, we need to do two more things. The first one is to fix kabi broken in mem_cgroup, we use kabi_reserve_5 to fix it in previous patch. The second one is to check cont-bit hugetlb since this feature only support for PMD-size and PUD-size hugepage.
This feature only support for 4KB pagesize, not support for 16KB and 64KB.
Signed-off-by: Liu Shixin liushixin2@huawei.com --- fs/Kconfig | 2 +- fs/hugetlbfs/inode.c | 2 +- include/linux/dynamic_hugetlb.h | 4 ++-- mm/dynamic_hugetlb.c | 13 ++++++++++--- 4 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/fs/Kconfig b/fs/Kconfig index a5ed26b093b7..385602ba0d99 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -262,7 +262,7 @@ config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
config DYNAMIC_HUGETLB bool "Dynamic HugeTLB" - depends on X86_64 + depends on X86_64 || (ARM64 && ARM64_4K_PAGES) depends on HUGETLBFS depends on MEMCG && CGROUP_HUGETLB help diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index b098177420c4..a701170aa638 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -1213,7 +1213,7 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) */ mpol_shared_policy_init(&p->policy, NULL); /* Initialize hpool here in case of a quick call to destroy */ - link_hpool(p); + link_hpool(p, sbinfo->hstate);
return &p->vfs_inode; } diff --git a/include/linux/dynamic_hugetlb.h b/include/linux/dynamic_hugetlb.h index 5dcba8e8b933..af523139ab3a 100644 --- a/include/linux/dynamic_hugetlb.h +++ b/include/linux/dynamic_hugetlb.h @@ -97,7 +97,7 @@ bool free_page_to_dhugetlb_pool(struct page *page); void free_page_list_to_dhugetlb_pool(struct list_head *list); int task_has_mem_in_hpool(struct task_struct *tsk);
-void link_hpool(struct hugetlbfs_inode_info *p); +void link_hpool(struct hugetlbfs_inode_info *p, struct hstate *h); void unlink_hpool(struct hugetlbfs_inode_info *p); bool file_has_mem_in_hpool(struct hugetlbfs_inode_info *p); int dhugetlb_acct_memory(struct hstate *h, long delta, struct hugetlbfs_inode_info *p); @@ -147,7 +147,7 @@ static inline int task_has_mem_in_hpool(struct task_struct *tsk) }
#ifdef CONFIG_HUGETLBFS -static inline void link_hpool(struct hugetlbfs_inode_info *p) +static inline void link_hpool(struct hugetlbfs_inode_info *p, struct hstate *h) { } static inline void unlink_hpool(struct hugetlbfs_inode_info *p) diff --git a/mm/dynamic_hugetlb.c b/mm/dynamic_hugetlb.c index 6b615009c3a4..ff4fd0c9f11b 100644 --- a/mm/dynamic_hugetlb.c +++ b/mm/dynamic_hugetlb.c @@ -5,6 +5,7 @@
#include <linux/rmap.h> #include <linux/migrate.h> +#include <linux/memblock.h> #include <linux/memory_hotplug.h> #include <linux/dynamic_hugetlb.h>
@@ -618,13 +619,19 @@ void free_page_list_to_dhugetlb_pool(struct list_head *list) } }
-void link_hpool(struct hugetlbfs_inode_info *p) +void link_hpool(struct hugetlbfs_inode_info *p, struct hstate *h) { + unsigned long size; + if (!dhugetlb_enabled || !p) return;
- p->hpool = find_hpool_by_task(current); - if (!get_hpool_unless_zero(p->hpool)) + size = huge_page_size(h); + if (size == PMD_SIZE || size == PUD_SIZE) { + p->hpool = find_hpool_by_task(current); + if (!get_hpool_unless_zero(p->hpool)) + p->hpool = NULL; + } else p->hpool = NULL; }