On 12/1/20 9:23 PM, Pavel Tatashin wrote:
PF_MEMALLOC_NOCMA is used for longterm pinning and has an effect of
clearing _GFP_MOVABLE or prohibiting allocations from ZONE_MOVABLE.
We will prohibit allocating any pages that are getting
longterm pinned from ZONE_MOVABLE, and we would want to unify and re-use
this flag. So, rename it to generic PF_MEMALLOC_NOMOVABLE.
Also re-name:
memalloc_nocma_save()/memalloc_nocma_restore
to
memalloc_nomovable_save()/memalloc_nomovable_restore()
and make the new functions common.
Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Looks accurate, and grep didn't find any lingering rename candidates
after this series is applied. And it's a good rename.
Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
thanks,
--
John Hubbard
NVIDIA
---
include/linux/sched.h | 2 +-
include/linux/sched/mm.h | 21 +++++----------------
mm/gup.c | 4 ++--
mm/hugetlb.c | 4 ++--
mm/page_alloc.c | 4 ++--
5 files changed, 12 insertions(+), 23 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 76cd21fa5501..f1bf05f5f5fa 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1548,7 +1548,7 @@ extern struct pid *cad_pid;
#define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
#define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_mask */
#define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */
-#define PF_MEMALLOC_NOCMA 0x10000000 /* All allocation request will have _GFP_MOVABLE cleared */
+#define PF_MEMALLOC_NOMOVABLE 0x10000000 /* All allocation request will have _GFP_MOVABLE cleared */
#define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */
#define PF_SUSPEND_TASK 0x80000000 /* This thread called freeze_processes() and should not be frozen */
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index d5ece7a9a403..5bb9a6b69479 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -254,29 +254,18 @@ static inline void memalloc_noreclaim_restore(unsigned int flags)
current->flags = (current->flags & ~PF_MEMALLOC) | flags;
}
-#ifdef CONFIG_CMA
-static inline unsigned int memalloc_nocma_save(void)
+static inline unsigned int memalloc_nomovable_save(void)
{
- unsigned int flags = current->flags & PF_MEMALLOC_NOCMA;
+ unsigned int flags = current->flags & PF_MEMALLOC_NOMOVABLE;
- current->flags |= PF_MEMALLOC_NOCMA;
+ current->flags |= PF_MEMALLOC_NOMOVABLE;
return flags;
}
-static inline void memalloc_nocma_restore(unsigned int flags)
+static inline void memalloc_nomovable_restore(unsigned int flags)
{
- current->flags = (current->flags & ~PF_MEMALLOC_NOCMA) | flags;
+ current->flags = (current->flags & ~PF_MEMALLOC_NOMOVABLE) | flags;
}
-#else
-static inline unsigned int memalloc_nocma_save(void)
-{
- return 0;
-}
-
-static inline void memalloc_nocma_restore(unsigned int flags)
-{
-}
-#endif
#ifdef CONFIG_MEMCG
DECLARE_PER_CPU(struct mem_cgroup *, int_active_memcg);
diff --git a/mm/gup.c b/mm/gup.c
index 0e2de888a8b0..724d8a65e1df 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1726,7 +1726,7 @@ static long __gup_longterm_locked(struct mm_struct *mm,
if (!vmas_tmp)
return -ENOMEM;
}
- flags = memalloc_nocma_save();
+ flags = memalloc_nomovable_save();
}
rc = __get_user_pages_locked(mm, start, nr_pages, pages,
@@ -1749,7 +1749,7 @@ static long __gup_longterm_locked(struct mm_struct *mm,
rc = check_and_migrate_cma_pages(mm, start, rc, pages,
vmas_tmp, gup_flags);
out:
- memalloc_nocma_restore(flags);
+ memalloc_nomovable_restore(flags);
}
if (vmas_tmp != vmas)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 37f15c3c24dc..02213c74ed6b 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1033,10 +1033,10 @@ static void enqueue_huge_page(struct hstate *h, struct page *page)
static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid)
{
struct page *page;
- bool nocma = !!(current->flags & PF_MEMALLOC_NOCMA);
+ bool nomovable = !!(current->flags & PF_MEMALLOC_NOMOVABLE);
list_for_each_entry(page, &h->hugepage_freelists[nid], lru) {
- if (nocma && is_migrate_cma_page(page))
+ if (nomovable && is_migrate_cma_page(page))
continue;
if (PageHWPoison(page))
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index eaa227a479e4..611799c72da5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3772,8 +3772,8 @@ static inline unsigned int current_alloc_flags(gfp_t gfp_mask,
#ifdef CONFIG_CMA
unsigned int pflags = current->flags;
- if (!(pflags & PF_MEMALLOC_NOCMA) &&
- gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ if (!(pflags & PF_MEMALLOC_NOMOVABLE) &&
+ gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE)
alloc_flags |= ALLOC_CMA;
#endif
