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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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6
kernel/mem.c
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@ -62,6 +62,7 @@ extern int interrupt_from_user(void *);
struct tlb_flush_entry tlb_flush_vector[IHK_TLB_FLUSH_IRQ_VECTOR_SIZE];
int anon_on_demand = 0;
int xpmem_remote_on_demand;
static struct ihk_mc_pa_ops *pa_ops;
@ -1954,6 +1955,11 @@ void mem_init(void)
kprintf("Demand paging on ANONYMOUS mappings enabled.\n");
anon_on_demand = 1;
}
if (find_command_line("xpmem_remote_on_demand")) {
kprintf("Demand paging on XPMEM remote mappings enabled.\n");
xpmem_remote_on_demand = 1;
}
/* Init distance vectors */
numa_distances_init();