[Xen-devel] [PATCH v2 06/21] memblock: memblock_phys_alloc_try_nid(): don't panic

[Mike Rapoport <rppt@xxxxxxxxxxxxx>]

The memblock_phys_alloc_try_nid() function tries to allocate memory from
the requested node and then falls back to allocation from any node in the
system. The memblock_alloc_base() fallback used by this function panics if
the allocation fails.

Replace the memblock_alloc_base() fallback with the direct call to
memblock_alloc_range_nid() and update the memblock_phys_alloc_try_nid()
callers to check the returned value and panic in case of error.

Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
---
 arch/arm64/mm/numa.c   | 4 ++++
 arch/powerpc/mm/numa.c | 4 ++++
 mm/memblock.c          | 4 +++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index ae34e3a..2c61ea4 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -237,6 +237,10 @@ static void __init setup_node_data(int nid, u64 start_pfn, 
u64 end_pfn)
                pr_info("Initmem setup node %d [<memory-less node>]\n", nid);
 
        nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+       if (!nd_pa)
+               panic("Cannot allocate %zu bytes for node %d data\n",
+                     nd_size, nid);
+
        nd = __va(nd_pa);
 
        /* report and initialize */
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 270cefb..8f2bbe1 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -788,6 +788,10 @@ static void __init setup_node_data(int nid, u64 start_pfn, 
u64 end_pfn)
        int tnid;
 
        nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+       if (!nd_pa)
+               panic("Cannot allocate %zu bytes for node %d data\n",
+                     nd_size, nid);
+
        nd = __va(nd_pa);
 
        /* report and initialize */
diff --git a/mm/memblock.c b/mm/memblock.c
index f019aee..8aabb1b 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1393,7 +1393,9 @@ phys_addr_t __init 
memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t ali
 
        if (res)
                return res;
-       return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
+       return memblock_alloc_range_nid(size, align, 0,
+                                       MEMBLOCK_ALLOC_ACCESSIBLE,
+                                       NUMA_NO_NODE, MEMBLOCK_NONE);
 }
 
 /**
-- 
2.7.4


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