- /*
- * Table sizes are from 0 to 7 (TCE_TABLE_SIZE_64K to
- * TCE_TABLE_SIZE_8M). Table size 0 has 8K entries and each
- * larger table size has twice as many entries, so shift the
- * max ram address by 13 to divide by 8K and then look at the
- * order of the result to choose between 0-7.
- */
- ret = get_order(ram >> 13);
- if (ret > TCE_TABLE_SIZE_8M)
+ if (is_kdump_kernel() && saved_max_pfn) {
+ /*
+ * Table sizes are from 0 to 7 (TCE_TABLE_SIZE_64K to
+ * TCE_TABLE_SIZE_8M). Table size 0 has 8K entries and each
+ * larger table size has twice as many entries, so shift the
+ * max ram address by 13 to divide by 8K and then look at the
+ * order of the result to choose between 0-7.
+ */
+ ret = get_order((saved_max_pfn * PAGE_SIZE) >> 13);
+ if (ret > TCE_TABLE_SIZE_8M)
+ ret = TCE_TABLE_SIZE_8M;
+ } else {
+ /*
+ * Use 8M by default (suggested by Muli) if it's not
+ * kdump kernel and saved_max_pfn isn't set.
+ */