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Message-ID: <20220717024615.2106835-47-Liam.Howlett@oracle.com> Date: Sun, 17 Jul 2022 02:46:52 +0000 From: Liam Howlett <liam.howlett@...cle.com> To: "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Yu Zhao <yuzhao@...gle.com>, Hugh Dickins <hughd@...gle.com> Subject: [PATCH v11 46/69] acct: use VMA iterator instead of linked list From: "Matthew Wilcox (Oracle)" <willy@...radead.org> The VMA iterator is faster than the linked list. Link: https://lkml.kernel.org/r/20220504011345.662299-31-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20220621204632.3370049-47-Liam.Howlett@oracle.com Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org> Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com> Acked-by: Vlastimil Babka <vbabka@...e.cz> Cc: Catalin Marinas <catalin.marinas@....com> Cc: David Howells <dhowells@...hat.com> Cc: SeongJae Park <sj@...nel.org> Cc: Will Deacon <will@...nel.org> Cc: Davidlohr Bueso <dave@...olabs.net> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> --- kernel/acct.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/kernel/acct.c b/kernel/acct.c index 13706356ec54..62200d799b9b 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -555,15 +555,14 @@ void acct_collect(long exitcode, int group_dead) unsigned long vsize = 0; if (group_dead && current->mm) { + struct mm_struct *mm = current->mm; + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; - mmap_read_lock(current->mm); - vma = current->mm->mmap; - while (vma) { + mmap_read_lock(mm); + for_each_vma(vmi, vma) vsize += vma->vm_end - vma->vm_start; - vma = vma->vm_next; - } - mmap_read_unlock(current->mm); + mmap_read_unlock(mm); } spin_lock_irq(¤t->sighand->siglock); -- 2.35.1
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