On 2/19/19 12:04 PM, [email protected] wrote:
From: Jérôme Glisse <[email protected]>CPU page table update can happens for many reasons, not only as a result of a syscall (munmap(), mprotect(), mremap(), madvise(), ...) but also as a result of kernel activities (memory compression, reclaim, migration, ...). Users of mmu notifier API track changes to the CPU page table and take specific action for them. While current API only provide range of virtual address affected by the change, not why the changes is happening This patch is just passing down the new informations by adding it to the mmu_notifier_range structure. Changes since v1: - Initialize flags field from mmu_notifier_range_init() arguments Signed-off-by: Jérôme Glisse <[email protected]> Cc: Christian König <[email protected]> Cc: Joonas Lahtinen <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: Jan Kara <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Peter Xu <[email protected]> Cc: Felix Kuehling <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Ross Zwisler <[email protected]> Cc: Dan Williams <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Radim Krčmář <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Christian Koenig <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: John Hubbard <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnd Bergmann <[email protected]> --- include/linux/mmu_notifier.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 62f94cd85455..0379956fff23 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -58,10 +58,12 @@ struct mmu_notifier_mm { #define MMU_NOTIFIER_RANGE_BLOCKABLE (1 << 0)struct mmu_notifier_range {+ struct vm_area_struct *vma; struct mm_struct *mm; unsigned long start; unsigned long end; unsigned flags; + enum mmu_notifier_event event; };struct mmu_notifier_ops {@@ -363,10 +365,12 @@ static inline void mmu_notifier_range_init(struct mmu_notifier_range *range, unsigned long start, unsigned long end) { + range->vma = vma; + range->event = event; range->mm = mm; range->start = start; range->end = end; - range->flags = 0; + range->flags = flags; }#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
Reviewed-by: Ralph Campbell <[email protected]> _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
