Hello, On (06/02/16 11:21), Michal Hocko wrote: [..] > @@ -2863,6 +2854,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, > > collect_mm_slot(mm_slot); > } > + mmput(mm); > > return progress; > } this possibly sleeping mmput() is called from under the spin_lock(&khugepaged_mm_lock). there is also a trivial build fixup needed (move collect_mm_slot() before __khugepaged_exit()). it's quite hard to trigger the bug (somehow), so I can't follow up with more information as of now. -ss -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
