The quilt patch titled Subject: mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again has been removed from the -mm tree. Its filename was mm-proc-pid-smaps_rollup-avoid-skipping-vma-after-getting-mmap_lock-again.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------ From: Yuanyuan Zhong yzhong@purestorage.com Subject: mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again Date: Thu, 23 May 2024 12:35:31 -0600
After switching smaps_rollup to use VMA iterator, searching for next entry is part of the condition expression of the do-while loop. So the current VMA needs to be addressed before the continue statement.
Otherwise, with some VMAs skipped, userspace observed memory consumption from /proc/pid/smaps_rollup will be smaller than the sum of the corresponding fields from /proc/pid/smaps.
Link: https://lkml.kernel.org/r/20240523183531.2535436-1-yzhong@purestorage.com Fixes: c4c84f06285e ("fs/proc/task_mmu: stop using linked list and highest_vm_end") Signed-off-by: Yuanyuan Zhong yzhong@purestorage.com Reviewed-by: Mohamed Khalfella mkhalfella@purestorage.com Cc: David Hildenbrand david@redhat.com Cc: Matthew Wilcox (Oracle) willy@infradead.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
fs/proc/task_mmu.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
--- a/fs/proc/task_mmu.c~mm-proc-pid-smaps_rollup-avoid-skipping-vma-after-getting-mmap_lock-again +++ a/fs/proc/task_mmu.c @@ -970,12 +970,17 @@ static int show_smaps_rollup(struct seq_ break;
/* Case 1 and 2 above */ - if (vma->vm_start >= last_vma_end) + if (vma->vm_start >= last_vma_end) { + smap_gather_stats(vma, &mss, 0); + last_vma_end = vma->vm_end; continue; + }
/* Case 4 above */ - if (vma->vm_end > last_vma_end) + if (vma->vm_end > last_vma_end) { smap_gather_stats(vma, &mss, last_vma_end); + last_vma_end = vma->vm_end; + } } } for_each_vma(vmi, vma);
_
Patches currently in -mm which might be from yzhong@purestorage.com are