The patch titled
Subject: mm: try harder to allocate vmemmap blocks
has been added to the -mm tree. Its filename is
mm-try-harder-to-allocate-vmemmap-blocks.patch
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------------------------------------------------------
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Subject: mm: try harder to allocate vmemmap blocks
Hot-adding memory on x86_64 normally requires huge page allocation. When
this is done to a VM guest, it's usually because the system is already
tight on memory, so the request tends to fail. Try to avoid this by
adding __GFP_REPEAT to the allocation flags.
Addresses http://bugs.debian.org/699913
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reported-by: Bernhard Schmidt <Bernhard.Schmidt@xxxxxx>
Tested-by: Bernhard Schmidt <Bernhard.Schmidt@xxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse-vmemmap.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff -puN mm/sparse-vmemmap.c~mm-try-harder-to-allocate-vmemmap-blocks mm/sparse-vmemmap.c
--- a/mm/sparse-vmemmap.c~mm-try-harder-to-allocate-vmemmap-blocks
+++ a/mm/sparse-vmemmap.c
@@ -53,10 +53,12 @@ void * __meminit vmemmap_alloc_block(uns
struct page *page;
if (node_state(node, N_HIGH_MEMORY))
- page = alloc_pages_node(node,
- GFP_KERNEL | __GFP_ZERO, get_order(size));
+ page = alloc_pages_node(
+ node, GFP_KERNEL | __GFP_ZERO | __GFP_REPEAT,
+ get_order(size));
else
- page = alloc_pages(GFP_KERNEL | __GFP_ZERO,
+ page = alloc_pages(
+ GFP_KERNEL | __GFP_ZERO | __GFP_REPEAT,
get_order(size));
if (page)
return page_address(page);
_
Patches currently in -mm which might be from ben@xxxxxxxxxxxxxxx are
linux-next.patch
mm-try-harder-to-allocate-vmemmap-blocks.patch
sparse-vmemmap-specify-vmemmap-population-range-in-bytes.patch
x86-64-remove-dead-debugging-code-for-pse-setups.patch
x86-64-use-vmemmap_populate_basepages-for-pse-setups.patch
x86-64-fall-back-to-regular-page-vmemmap-on-allocation-failure.patch
dmi_scan-refactor-dmi_scan_machine-smbiosdmi_present.patch
dmi_scan-refactor-dmi_scan_machine-smbiosdmi_present-fix.patch
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