From 4746f5ce0fa52e21b5fe432970fe9516d1a45ebc Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Wed, 3 Apr 2024 18:18:30 +0100
Subject: [PATCH] khugepaged: inline hpage_collapse_alloc_folio()
Patch series "khugepaged folio conversions".
We've been kind of hacking piecemeal at converting khugepaged to use
folios instead of compound pages, and so this patchset is a little larger
than it should be as I undo some of our wrong moves in the past. In
particular, collapse_file() now consistently uses 'new_folio' for the
freshly allocated folio and 'folio' for the one that's currently in use.
This patch (of 7):
This function has one caller, and the combined function is simpler to
read, reason about and modify.
Link: https://lkml.kernel.org/r/20240403171838.1445826-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20240403171838.1445826-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/khugepaged.c | 19 ++++---------------
1 file changed, 4 insertions(+), 15 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 38830174608fb..ad16dd8b26a8a 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -891,20 +891,6 @@ static int hpage_collapse_find_target_node(struct collapse_control *cc)
}
#endif
-static bool hpage_collapse_alloc_folio(struct folio **folio, gfp_t gfp, int node,
- nodemask_t *nmask)
-{
- *folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, nmask);
-
- if (unlikely(!*folio)) {
- count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
- return false;
- }
-
- count_vm_event(THP_COLLAPSE_ALLOC);
- return true;
-}
-
/*
* If mmap_lock temporarily dropped, revalidate vma
* before taking mmap_lock.
@@ -1067,11 +1053,14 @@ static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm,
int node = hpage_collapse_find_target_node(cc);
struct folio *folio;
- if (!hpage_collapse_alloc_folio(&folio, gfp, node, &cc->alloc_nmask)) {
+ folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask);
+ if (!folio) {
*hpage = NULL;
+ count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
return SCAN_ALLOC_HUGE_PAGE_FAIL;
}
+ count_vm_event(THP_COLLAPSE_ALLOC);
if (unlikely(mem_cgroup_charge(folio, mm, gfp))) {
folio_put(folio);
*hpage = NULL;
--
2.30.2