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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-09-06 19:48:58 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:22 -0700 |
| commit | 160c820023bbfe7c478ed3041cc50604d664f047 (patch) | |
| tree | ec0d58f2cae4235c3b2f13cc4768d8136f8ef67d /kernel/acct.c | |
| parent | 01293a62bae2fa55c09cebf5a771eab7219171c3 (diff) | |
| download | linux-160c820023bbfe7c478ed3041cc50604d664f047.tar.gz linux-160c820023bbfe7c478ed3041cc50604d664f047.tar.bz2 linux-160c820023bbfe7c478ed3041cc50604d664f047.zip | |
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.c | 11 |
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(¤t->sighand->siglock); |