6.6-stable review patch. If anyone has any objections, please let me know.
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From: Matthew Wilcox (Oracle) willy@infradead.org
[ Upstream commit 4746f5ce0fa52e21b5fe432970fe9516d1a45ebc ]
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 Stable-dep-of: 37f0b47c5143 ("mm: khugepaged: fix the arguments order in khugepaged_collapse_file trace point") Signed-off-by: Sasha Levin sashal@kernel.org --- mm/khugepaged.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index cb6a243688045..d0fcfa47085b4 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -887,20 +887,6 @@ 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. @@ -1063,11 +1049,14 @@ 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;