On 07/05/2010 09:16 PM, Marcelo Tosatti wrote:
test long rmap chains
+
+int main (void)
+{
+ int i;
+ int nr_pages;
+ void *target_page, *virt_addr;
+
+ setup_vm();
+
+ nr_pages = inl(0xd1) / PAGE_SIZE;
+ nr_pages -= 1000;
No need to depend on the number of physical pages, since just one page
is used (+ 1/512 page for the pte).
+ target_page = alloc_page();
+
+ virt_addr = (void *) 0xfffffa000;
+ for (i = 0; i< nr_pages; i++) {
+ install_page(phys_to_virt(read_cr3()), virt_to_phys(target_page),
+ virt_addr);
+ virt_addr += PAGE_SIZE;
+ }
+ printf("created %d mappings\n", nr_pages);
+
+ virt_addr = (void *) 0xfffffa000;
+ for (i = 0; i< nr_pages; i++) {
+ unsigned long *touch = virt_addr;
+
+ *touch = 0;
+ virt_addr += PAGE_SIZE;
+ }
+ printf("instantiated mappings\n");
+
+ virt_addr += PAGE_SIZE;
+ install_pte(phys_to_virt(read_cr3()), 1, virt_addr,
+ 0 | PTE_PRESENT | PTE_WRITE, target_page);
+
+ *(unsigned long *)virt_addr = 0;
+ printf("PASS\n");
+
Would be nice to add measure the time for this, and fail above some
threshold. Of course it's problematic in automated scenarios where the
host can be overloaded, but still.
--
error compiling committee.c: too many arguments to function
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