Re: [PATCH v3] ksm: fix conflict between mmput and scan_get_next_rmap_item

Please ignore this patch v3. I forgot to change the function unmerge_and_remove_all_rmap_items(). Patch v4 will be the final version, I think.. Sorry for my carelessness. Thanks! On 2016/5/8 14:56, Zhou Chengming wrote: A concurrency issue about KSM in the function scan_get_next_rmap_item. tas

[PATCH v3] ksm: fix conflict between mmput and scan_get_next_rmap_item

A concurrency issue about KSM in the function scan_get_next_rmap_item. task A (ksmd): |task B (the mm's task): | mm = slot->mm; | down_read(&mm->mmap_sem); |