The patch titled
Subject: mm/hugetlb: rename folio_putback_active_hugetlb() to folio_putback_hugetlb()
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/hugetlb: rename folio_putback_active_hugetlb() to folio_putback_hugetlb()
Date: Fri, 10 Jan 2025 19:21:47 +0100
Now that folio_putback_hugetlb() is only called on folios that were
previously isolated through folio_isolate_hugetlb(), let's rename it to
match folio_putback_lru().
Add some kernel doc to clarify how this function is supposed to be used.
Link: https://lkml.kernel.org/r/20250110182149.746551-5-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/hugetlb.h | 4 ++--
mm/hugetlb.c | 15 +++++++++++++--
mm/migrate.c | 6 +++---
3 files changed, 18 insertions(+), 7 deletions(-)
--- a/include/linux/hugetlb.h~mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb
+++ a/include/linux/hugetlb.h
@@ -157,7 +157,7 @@ bool folio_isolate_hugetlb(struct folio
int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison);
int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
bool *migratable_cleared);
-void folio_putback_active_hugetlb(struct folio *folio);
+void folio_putback_hugetlb(struct folio *folio);
void move_hugetlb_state(struct folio *old_folio, struct folio *new_folio, int reason);
void hugetlb_fix_reserve_counts(struct inode *inode);
extern struct mutex *hugetlb_fault_mutex_table;
@@ -430,7 +430,7 @@ static inline int get_huge_page_for_hwpo
return 0;
}
-static inline void folio_putback_active_hugetlb(struct folio *folio)
+static inline void folio_putback_hugetlb(struct folio *folio)
{
}
--- a/mm/hugetlb.c~mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb
+++ a/mm/hugetlb.c
@@ -7430,7 +7430,7 @@ __weak unsigned long hugetlb_mask_last_p
* it is already isolated/non-migratable.
*
* On success, an additional folio reference is taken that must be dropped
- * using folio_putback_active_hugetlb() to undo the isolation.
+ * using folio_putback_hugetlb() to undo the isolation.
*
* Return: True if isolation worked, otherwise False.
*/
@@ -7482,7 +7482,18 @@ int get_huge_page_for_hwpoison(unsigned
return ret;
}
-void folio_putback_active_hugetlb(struct folio *folio)
+/**
+ * folio_putback_hugetlb: unisolate a hugetlb folio
+ * @folio: the isolated hugetlb folio
+ *
+ * Putback/un-isolate the hugetlb folio that was previous isolated using
+ * folio_isolate_hugetlb(): marking it non-isolated/migratable and putting it
+ * back onto the active list.
+ *
+ * Will drop the additional folio reference obtained through
+ * folio_isolate_hugetlb().
+ */
+void folio_putback_hugetlb(struct folio *folio)
{
spin_lock_irq(&hugetlb_lock);
folio_set_hugetlb_migratable(folio);
--- a/mm/migrate.c~mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb
+++ a/mm/migrate.c
@@ -137,7 +137,7 @@ void putback_movable_pages(struct list_h
list_for_each_entry_safe(folio, folio2, l, lru) {
if (unlikely(folio_test_hugetlb(folio))) {
- folio_putback_active_hugetlb(folio);
+ folio_putback_hugetlb(folio);
continue;
}
list_del(&folio->lru);
@@ -1454,7 +1454,7 @@ static int unmap_and_move_huge_page(new_
if (folio_ref_count(src) == 1) {
/* page was freed from under us. So we are done. */
- folio_putback_active_hugetlb(src);
+ folio_putback_hugetlb(src);
return MIGRATEPAGE_SUCCESS;
}
@@ -1537,7 +1537,7 @@ out_unlock:
folio_unlock(src);
out:
if (rc == MIGRATEPAGE_SUCCESS)
- folio_putback_active_hugetlb(src);
+ folio_putback_hugetlb(src);
else if (rc != -EAGAIN)
list_move_tail(&src->lru, ret);
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
docs-tmpfs-update-the-large-folios-policy-for-tmpfs-and-shmem.patch
mm-memory_hotplug-move-debug_pagealloc_map_pages-into-online_pages_range.patch
mm-page_isolation-dont-pass-gfp-flags-to-isolate_single_pageblock.patch
mm-page_isolation-dont-pass-gfp-flags-to-start_isolate_page_range.patch
mm-page_alloc-make-__alloc_contig_migrate_range-static.patch
mm-page_alloc-sort-out-the-alloc_contig_range-gfp-flags-mess.patch
mm-page_alloc-forward-the-gfp-flags-from-alloc_contig_range-to-post_alloc_hook.patch
powernv-memtrace-use-__gfp_zero-with-alloc_contig_pages.patch
mm-hugetlb-dont-map-folios-writable-without-vm_write-when-copying-during-fork.patch
mm-page_alloc-dont-use-__gfp_hardwall-when-migrating-pages-via-alloc_contig.patch
mm-memory_hotplug-dont-use-__gfp_hardwall-when-migrating-pages-via-memory-offlining.patch
mm-huge_memory-convert-has_hwpoisoned-into-a-pure-folio-flag.patch
mm-hugetlb-rename-isolate_hugetlb-to-folio_isolate_hugetlb.patch
mm-migrate-dont-call-folio_putback_active_hugetlb-on-dst-hugetlb-folio.patch
mm-hugetlb-rename-folio_putback_active_hugetlb-to-folio_putback_hugetlb.patch
mm-hugetlb-cgroup-convert-hugetlb_cgroup_css_offline-to-work-on-folios.patch
mm-hugetlb-use-folio-lru-int-demote_free_hugetlb_folios.patch
