The patch titled
Subject: mm/khugepaged: convert alloc_charge_hpage() to use folios
has been added to the -mm mm-unstable branch. Its filename is
mm-khugepaged-convert-alloc_charge_hpage-to-use-folios.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-khugepaged-convert-alloc_charge_hpage-to-use-folios.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: "Vishal Moola (Oracle)" <vishal.moola@xxxxxxxxx>
Subject: mm/khugepaged: convert alloc_charge_hpage() to use folios
Date: Mon, 16 Oct 2023 13:05:09 -0700
Also convert hpage_collapse_alloc_page() to hpage_collapse_alloc_folio().
This removes 1 call to compound_head() and helps convert khugepaged to use
folios throughout.
Link: https://lkml.kernel.org/r/20231016200510.7387-5-vishal.moola@xxxxxxxxx
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/khugepaged.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
--- a/mm/khugepaged.c~mm-khugepaged-convert-alloc_charge_hpage-to-use-folios
+++ a/mm/khugepaged.c
@@ -886,16 +886,16 @@ static int hpage_collapse_find_target_no
}
#endif
-static bool hpage_collapse_alloc_page(struct page **hpage, gfp_t gfp, int node,
+static bool hpage_collapse_alloc_folio(struct folio **folio, gfp_t gfp, int node,
nodemask_t *nmask)
{
- *hpage = __alloc_pages(gfp, HPAGE_PMD_ORDER, node, nmask);
- if (unlikely(!*hpage)) {
+ *folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, nmask);
+
+ if (unlikely(!*folio)) {
count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
return false;
}
- folio_prep_large_rmappable((struct folio *)*hpage);
count_vm_event(THP_COLLAPSE_ALLOC);
return true;
}
@@ -1062,15 +1062,16 @@ static int alloc_charge_hpage(struct pag
int node = hpage_collapse_find_target_node(cc);
struct folio *folio;
- if (!hpage_collapse_alloc_page(hpage, gfp, node, &cc->alloc_nmask))
+ if (!hpage_collapse_alloc_folio(&folio, gfp, node, &cc->alloc_nmask))
return SCAN_ALLOC_HUGE_PAGE_FAIL;
- folio = page_folio(*hpage);
if (unlikely(mem_cgroup_charge(folio, mm, gfp))) {
folio_put(folio);
*hpage = NULL;
return SCAN_CGROUP_CHARGE_FAIL;
}
+
+ *hpage = folio_page(folio, 0);
count_memcg_page_event(*hpage, THP_COLLAPSE_ALLOC);
return SCAN_SUCCEED;
_
Patches currently in -mm which might be from vishal.moola@xxxxxxxxx are
mm-khugepaged-convert-__collapse_huge_page_isolate-to-use-folios.patch
mm-khugepaged-convert-hpage_collapse_scan_pmd-to-use-folios.patch
mm-khugepaged-convert-is_refcount_suitable-to-use-folios.patch
mm-khugepaged-convert-alloc_charge_hpage-to-use-folios.patch
mm-khugepaged-convert-collapse_pte_mapped_thp-to-use-folios.patch
