diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/cachetlb.txt | 27 |
1 files changed, 2 insertions, 25 deletions
diff --git a/Documentation/cachetlb.txt b/Documentation/cachetlb.txt index 552caba..da42ab4 100644 --- a/Documentation/cachetlb.txt +++ b/Documentation/cachetlb.txt @@ -87,30 +87,7 @@ changes occur: This is used primarily during fault processing. -5) void flush_tlb_pgtables(struct mm_struct *mm, - unsigned long start, unsigned long end) - - The software page tables for address space 'mm' for virtual - addresses in the range 'start' to 'end-1' are being torn down. - - Some platforms cache the lowest level of the software page tables - in a linear virtually mapped array, to make TLB miss processing - more efficient. On such platforms, since the TLB is caching the - software page table structure, it needs to be flushed when parts - of the software page table tree are unlinked/freed. - - Sparc64 is one example of a platform which does this. - - Usually, when munmap()'ing an area of user virtual address - space, the kernel leaves the page table parts around and just - marks the individual pte's as invalid. However, if very large - portions of the address space are unmapped, the kernel frees up - those portions of the software page tables to prevent potential - excessive kernel memory usage caused by erratic mmap/mmunmap - sequences. It is at these times that flush_tlb_pgtables will - be invoked. - -6) void update_mmu_cache(struct vm_area_struct *vma, +5) void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) At the end of every page fault, this routine is invoked to @@ -123,7 +100,7 @@ changes occur: translations for software managed TLB configurations. The sparc64 port currently does this. -7) void tlb_migrate_finish(struct mm_struct *mm) +6) void tlb_migrate_finish(struct mm_struct *mm) This interface is called at the end of an explicit process migration. This interface provides a hook |