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xpmem: fix mapping of attachment and segment

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* Mapping attached part of segment is done at attach time instead of
  make time to work with runtimes (e.g. OpenMPI) xpmem_make-ing the
  entire user-space
* Mapping attached part of segment at attach time can be turned off by
  specifying xpmem_remote_on_demand in kernel argument
* Mapping attachment chooses appropriate page-sizes, i.e., largest
  allowed by memory range and segment page boundary

Fixes: a8696d8 "xpmem: Support large page attachment"
Change-Id: I44663865204036520e5f62fe22b9134ee4629f9b
This commit is contained in:
Masamichi Takagi
2020-05-12 13:17:46 +09:00
parent d370e9241f
commit a5fcc91656
43 changed files with 2876 additions and 285 deletions
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2
kernel/include/page.h
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@@ -69,4 +69,6 @@ static inline int page_is_multi_mapped(struct page *page)
/* Should we take page faults on ANONYMOUS mappings? */
extern int anon_on_demand;
extern int xpmem_remote_on_demand;
#endif

3
kernel/include/process.h
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@@ -830,6 +830,9 @@ struct vm_range *previous_process_memory_range(
int extend_up_process_memory_range(struct process_vm *vm,
struct vm_range *range, uintptr_t newend);
int page_fault_process_memory_range(struct process_vm *vm,
struct vm_range *range,
uintptr_t fault_addr, uint64_t reason);
int page_fault_process_vm(struct process_vm *fault_vm, void *fault_addr,
uint64_t reason);
int remove_process_region(struct process_vm *vm,

2
kernel/include/xpmem.h
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@@ -31,7 +31,7 @@ int xpmem_update_process_page_table(struct process_vm *vm,
struct vm_range *vmr);
struct xpmem_attachment {
mcs_rwlock_lock_t at_lock; /* att lock */
ihk_rwspinlock_t at_lock; /* att lock */
unsigned long vaddr; /* starting address of seg attached */
unsigned long at_vaddr; /* address where seg is attached */
size_t at_size; /* size of seg attachment */

5
kernel/include/xpmem_private.h
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@@ -248,11 +248,12 @@ static void xpmem_clear_PTEs_of_att(struct xpmem_attachment *, unsigned long,
static int xpmem_remap_pte(struct process_vm *, struct vm_range *,
unsigned long, uint64_t, struct xpmem_segment *, unsigned long);
static int xpmem_ensure_valid_page(struct xpmem_segment *, unsigned long);
static int xpmem_ensure_valid_page(struct xpmem_segment *, unsigned long,
int);
static pte_t * xpmem_vaddr_to_pte(struct process_vm *, unsigned long,
size_t *pgsize);
static int xpmem_pin_page(struct xpmem_thread_group *, struct thread *,
struct process_vm *, unsigned long);
struct process_vm *, unsigned long, int);
static void xpmem_unpin_pages(struct xpmem_segment *, struct process_vm *,
unsigned long, size_t);