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Date: Tue, 12 Jan 2021 11:12:25 -0500 From: "Liam R. Howlett" <Liam.Howlett@...cle.com> To: maple-tree@...ts.infradead.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org Cc: Andrew Morton <akpm@...gle.com>, Song Liu <songliubraving@...com>, Davidlohr Bueso <dave@...olabs.net>, "Paul E . McKenney" <paulmck@...nel.org>, Matthew Wilcox <willy@...radead.org>, Jerome Glisse <jglisse@...hat.com>, David Rientjes <rientjes@...gle.com>, Axel Rasmussen <axelrasmussen@...gle.com>, Suren Baghdasaryan <surenb@...gle.com>, Vlastimil Babka <vbabka@...e.cz>, Rik van Riel <riel@...riel.com>, Peter Zijlstra <peterz@...radead.org> Subject: [PATCH v2 55/70] mm/ksm: Use maple tree iterators instead of vma linked list Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com> --- mm/ksm.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/mm/ksm.c b/mm/ksm.c index 0960750bb316d..9aa579cef7614 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -975,10 +975,12 @@ static int unmerge_and_remove_all_rmap_items(void) spin_unlock(&ksm_mmlist_lock); for (mm_slot = ksm_scan.mm_slot; - mm_slot != &ksm_mm_head; mm_slot = ksm_scan.mm_slot) { - mm = mm_slot->mm; + mm_slot != &ksm_mm_head; mm_slot = ksm_scan.mm_slot, mm = mm_slot->mm) { + MA_STATE(mas, &mm->mm_mt, 0, 0); + mmap_read_lock(mm); - for (vma = mm->mmap; vma; vma = vma->vm_next) { + mas_set(&mas, 0); + mas_for_each(&mas, vma, ULONG_MAX) { if (ksm_test_exit(mm)) break; if (!(vma->vm_flags & VM_MERGEABLE) || !vma->anon_vma) @@ -2286,13 +2288,14 @@ static struct rmap_item *scan_get_next_rmap_item(struct page **page) } mm = slot->mm; + MA_STATE(mas, &mm->mm_mt, 0, 0); + mmap_read_lock(mm); if (ksm_test_exit(mm)) - vma = NULL; - else - vma = find_vma(mm, ksm_scan.address); + goto no_vmas; - for (; vma; vma = vma->vm_next) { + mas_set(&mas, ksm_scan.address); + mas_for_each(&mas, vma, ULONG_MAX) { if (!(vma->vm_flags & VM_MERGEABLE)) continue; if (ksm_scan.address < vma->vm_start) @@ -2330,6 +2333,7 @@ static struct rmap_item *scan_get_next_rmap_item(struct page **page) } if (ksm_test_exit(mm)) { +no_vmas: ksm_scan.address = 0; ksm_scan.rmap_list = &slot->rmap_list; } -- 2.28.0
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