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authorMatthew Wilcox (Oracle) <willy@infradead.org>2022-09-06 22:48:58 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-09-27 05:46:22 +0300
commit160c820023bbfe7c478ed3041cc50604d664f047 (patch)
treeec0d58f2cae4235c3b2f13cc4768d8136f8ef67d /kernel/acct.c
parent01293a62bae2fa55c09cebf5a771eab7219171c3 (diff)
downloadlinux-160c820023bbfe7c478ed3041cc50604d664f047.tar.xz
acct: use VMA iterator instead of linked list
The VMA iterator is faster than the linked list. Link: https://lkml.kernel.org/r/20220906194824.2110408-47-Liam.Howlett@oracle.com Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Tested-by: Yu Zhao <yuzhao@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: SeongJae Park <sj@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/acct.c')
-rw-r--r--kernel/acct.c11
1 files 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(&current->sighand->siglock);