On Wed, Jul 31, 2019 at 11:33:29AM -0700, Song Liu wrote: > Changes v1 => v2: > 1. Call collapse_pte_mapped_thp() directly from uprobe_write_opcode(); > 2. Add VM_BUG_ON() for addr alignment in khugepaged_add_pte_mapped_thp() > and collapse_pte_mapped_thp(). > > This set is the newer version of 5/6 and 6/6 of [1]. Newer version of > 1-4 of the work [2] was recently picked by Andrew. > > Patch 1 enables khugepaged to handle pte-mapped THP. These THPs are left > in such state when khugepaged failed to get exclusive lock of mmap_sem. > > Patch 2 leverages work in 1 for uprobe on THP. After [2], uprobe only > splits the PMD. When the uprobe is disabled, we get pte-mapped THP. > After this set, these pte-mapped THP will be collapsed as pmd-mapped. > > [1] https://lkml.org/lkml/2019/6/23/23 > [2] https://www.spinics.net/lists/linux-mm/msg185889.html > > Song Liu (2): > khugepaged: enable collapse pmd for pte-mapped THP > uprobe: collapse THP pmd after removing all uprobes Looks good for the start. Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> -- Kirill A. Shutemov
