search for: src_pte

...| 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) =================================================================== --- a/mm/memory.c +++ b/mm/memory.c @@ -466,7 +466,7 @@ copy_one_pte(struct mm_struct *dst_mm, s */ if (is_cow_mapping(vm_flags)) { ptep_set_wrprotect(src_mm, addr, src_pte); - pte = *src_pte; + pte = pte_wrprotect(pte); } /*

...of the next boundary, * or the end address of the range if that comes earlier. Although no * vma end wraps to 0, rounded up __boundary may wrap to 0 throughout. =================================================================== --- a/mm/memory.c +++ b/mm/memory.c @@ -506,6 +506,7 @@ again: src_pte = pte_offset_map_nested(src_pmd, addr); src_ptl = pte_lockptr(src_mm, src_pmd); spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING); + arch_enter_lazy_mmu_mode(); do { /* @@ -527,6 +528,7 @@ again: progress += 8; } while (dst_pte++, src_pte++, addr += PAGE_SIZE, addr != end); + arch_l...

I''m sure everyone has seen the drop of VMI patches for Linux at this point, but just in case, the link is included below. I''ve read this version of the VMI spec and have made my way through most of the patches. While I wasn''t really that impressed with the first spec wrt Xen, the second version seems to be much more palatable. Specifically, the code inlining and

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

...e != (((unsigned) APTDpde) & PG_FRAME)) { + APTDpde = (pd_entry_t) (dst_frame | PG_RW | PG_V); +#if defined(SMP) + /* The page directory is not shared between CPUs */ + cpu_invltlb(); +#else + invltlb(); +#endif + } + for(addr = src_addr; addr < end_addr; addr = pdnxt) { - pt_entry_t *src_pte, *dst_pte; + unsigned *src_pte, *dst_pte; vm_page_t dstmpte, srcmpte; - pd_entry_t srcptepaddr; + vm_offset_t srcptepaddr; unsigned ptepindex; if (addr >= UPT_MIN_ADDRESS) @@ -2434,32 +2642,33 @@ pv_entry_count > pv_entry_high_water) break; - pdnxt = (addr + NBPD...

At OLS I gave a talk on some of the Xen scalability inhibitors, and one of these was writable page tables. We went over why the feature does not scale, but just as important, we found that the uniprocessor case does not provide any advantage either. These tests were done on x86_64, so I wanted to run the 1-way test on 32 bit to show the same problem. So, I have run with writable PTs and