The patch titled
x86_64 fake numa: provide an io hole size in a given address range
has been added to the -mm tree. Its filename is
x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: x86_64 fake numa: provide an io hole size in a given address range
From: Rohit Seth <rohitseth@xxxxxxxxxx>
This patch provides a IO hole size in a given address range.
Signed-off-by: David Rientjes <reintjes@xxxxxxxxxx>
Signed-off-by: Paul Menage <menage@xxxxxxxxxx>
Signed-off-by: Rohit Seth <rohitseth@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/e820.c | 32 ++++++++++++++++++++++++++++++++
include/asm-x86_64/e820.h | 1 +
2 files changed, 33 insertions(+)
diff -puN arch/x86_64/kernel/e820.c~x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range arch/x86_64/kernel/e820.c
--- a/arch/x86_64/kernel/e820.c~x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range
+++ a/arch/x86_64/kernel/e820.c
@@ -184,6 +184,38 @@ unsigned long __init e820_end_of_ram(voi
}
/*
+ * Find the hole size in the range.
+ */
+unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
+{
+ unsigned long ram = 0;
+ int i;
+
+ for (i = 0; i < e820.nr_map; i++) {
+ struct e820entry *ei = &e820.map[i];
+ unsigned long last, addr;
+
+ if (ei->type != E820_RAM ||
+ ei->addr+ei->size <= start ||
+ ei->addr >= end)
+ continue;
+
+ addr = round_up(ei->addr, PAGE_SIZE);
+ if (addr < start)
+ addr = start;
+
+ last = round_down(ei->addr + ei->size, PAGE_SIZE);
+ if (last >= end)
+ last = end;
+
+ if (last > addr)
+ ram += last - addr;
+ }
+ return ((end - start) - ram);
+}
+
+
+/*
* Mark e820 reserved areas as busy for the resource manager.
*/
void __init e820_reserve_resources(void)
diff -puN include/asm-x86_64/e820.h~x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range include/asm-x86_64/e820.h
--- a/include/asm-x86_64/e820.h~x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range
+++ a/include/asm-x86_64/e820.h
@@ -46,6 +46,7 @@ extern void e820_mark_nosave_regions(voi
extern void e820_print_map(char *who);
extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);
extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);
+extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
extern void e820_setup_gap(void);
extern void e820_register_active_regions(int nid,
_
Patches currently in -mm which might be from rohitseth@xxxxxxxxxx are
x86_64-fake-numa-provides-a-io-hole-size-in-a-given-address-range.patch
x86_64-fake-numa-increase-the-node_shift.patch
x86_64-fake-numa-fix-numa=fake.patch
x86_64-fake-numa-extends-the-kernel-command-line-option-for-numa=fake.patch
memory-page_alloc-zonelist-caching-speedup.patch
memory-page_alloc-zonelist-caching-reorder-structure.patch
updated-i386-cleanup-apic-code.patch
updated-i386-rework-local-apic-calibration.patch
updated-dynticks-fix-nmi-watchdog.patch
-
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