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[PATCH 1/3] of/numa: remove a duplicated pr_debug information

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[PATCH 1/3] of/numa: remove a duplicated pr_debug information

Zhen Lei
This information will be printed in the subfunction numa_add_memblk.
They are not the same, but very similar.

Signed-off-by: Zhen Lei <[hidden email]>
---
 drivers/of/of_numa.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index 0f2784b..21d831f 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -88,9 +88,6 @@ static int __init of_numa_parse_memory_nodes(void)
  break;
  }

- pr_debug("NUMA:  base = %llx len = %llx, node = %u\n",
- rsrc.start, rsrc.end - rsrc.start + 1, nid);
-
  r = numa_add_memblk(nid, rsrc.start,
     rsrc.end - rsrc.start + 1);
  if (r)
--
2.5.0


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[PATCH 2/3] of/numa: fix a memory@ dt node can only contains one memory block

Zhen Lei
For a normal memory@ devicetree node, its reg property can contains more
memory blocks.

Because we don't known how many memory blocks maybe contained, so we try
from index=0, increase 1 until error returned(the end).

Signed-off-by: Zhen Lei <[hidden email]>
---
 drivers/of/of_numa.c | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index 21d831f..2c5f249 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -63,7 +63,7 @@ static int __init of_numa_parse_memory_nodes(void)
  struct device_node *np = NULL;
  struct resource rsrc;
  u32 nid;
- int r = 0;
+ int i, r = 0;

  for (;;) {
  np = of_find_node_by_type(np, "memory");
@@ -82,17 +82,27 @@ static int __init of_numa_parse_memory_nodes(void)
  /* some other error */
  break;

- r = of_address_to_resource(np, 0, &rsrc);
- if (r) {
- pr_err("NUMA: bad reg property in memory node\n");
- break;
+ for (i = 0; ; i++) {
+ r = of_address_to_resource(np, i, &rsrc);
+ if (r) {
+ /* reached the end of of_address */
+ if (i > 0) {
+ r = 0;
+ break;
+ }
+
+ pr_err("NUMA: bad reg property in memory node\n");
+ goto finished;
+ }
+
+ r = numa_add_memblk(nid, rsrc.start,
+    rsrc.end - rsrc.start + 1);
+ if (r)
+ goto finished;
  }
-
- r = numa_add_memblk(nid, rsrc.start,
-    rsrc.end - rsrc.start + 1);
- if (r)
- break;
  }
+
+finished:
  of_node_put(np);

  return r;
--
2.5.0


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[PATCH 3/3] arm64/numa: fix type info

Zhen Lei
In reply to this post by Zhen Lei
numa_init(of_numa_init) may returned error because of numa configuration
error. So "No NUMA configuration found" is inaccurate. In fact, specific
configuration error information can be immediately printed by the
testing branch. So "No NUMA..." only needs to be printed when numa_off.

Signed-off-by: Zhen Lei <[hidden email]>
---
 arch/arm64/mm/numa.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index 98dc104..9937cc1 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -362,7 +362,8 @@ static int __init dummy_numa_init(void)
  int ret;
  struct memblock_region *mblk;

- pr_info("%s\n", "No NUMA configuration found");
+ if (numa_off)
+ pr_info("%s\n", "No NUMA configuration found");
  pr_info("NUMA: Faking a node at [mem %#018Lx-%#018Lx]\n",
        0LLU, PFN_PHYS(max_pfn) - 1);

--
2.5.0


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Re: [PATCH 2/3] of/numa: fix a memory@ dt node can only contains one memory block

Rob Herring-3
In reply to this post by Zhen Lei
On Thu, May 26, 2016 at 10:43:58AM +0800, Zhen Lei wrote:

> For a normal memory@ devicetree node, its reg property can contains more
> memory blocks.
>
> Because we don't known how many memory blocks maybe contained, so we try
> from index=0, increase 1 until error returned(the end).
>
> Signed-off-by: Zhen Lei <[hidden email]>
> ---
>  drivers/of/of_numa.c | 30 ++++++++++++++++++++----------
>  1 file changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
> index 21d831f..2c5f249 100644
> --- a/drivers/of/of_numa.c
> +++ b/drivers/of/of_numa.c
> @@ -63,7 +63,7 @@ static int __init of_numa_parse_memory_nodes(void)
>   struct device_node *np = NULL;
>   struct resource rsrc;
>   u32 nid;
> - int r = 0;
> + int i, r = 0;
>
>   for (;;) {
>   np = of_find_node_by_type(np, "memory");
> @@ -82,17 +82,27 @@ static int __init of_numa_parse_memory_nodes(void)
>   /* some other error */
>   break;
>
> - r = of_address_to_resource(np, 0, &rsrc);
> - if (r) {
> - pr_err("NUMA: bad reg property in memory node\n");
> - break;
> + for (i = 0; ; i++) {
> + r = of_address_to_resource(np, i, &rsrc);
> + if (r) {
> + /* reached the end of of_address */
> + if (i > 0) {
> + r = 0;
> + break;
> + }
> +
> + pr_err("NUMA: bad reg property in memory node\n");
> + goto finished;
> + }
> +
> + r = numa_add_memblk(nid, rsrc.start,
> +    rsrc.end - rsrc.start + 1);
> + if (r)
> + goto finished;
>   }
> -
> - r = numa_add_memblk(nid, rsrc.start,
> -    rsrc.end - rsrc.start + 1);
> - if (r)
> - break;
>   }
> +
> +finished:
>   of_node_put(np);

This function can be simplified down to:

        for_each_node_by_type(np, "memory") {
                r = of_property_read_u32(np, "numa-node-id", &nid);
                if (r == -EINVAL)
                        /*
                         * property doesn't exist if -EINVAL, continue
                         * looking for more memory nodes with
                         * "numa-node-id" property
                         */
                        continue;
                else if (r)
                        /* some other error */
                        break;

                r = of_address_to_resource(np, 0, &rsrc);
                for (i = 0; !r; i++, r = of_address_to_resource(np, i,
&rsrc)) {
                        r = numa_add_memblk(nid, rsrc.start,
                                    rsrc.end - rsrc.start + 1);
                }
        }
        of_node_put(np);

        return r;


Perhaps with a "if (!i && r) pr_err()" for an error message at the end.

Rob
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Re: [PATCH 3/3] arm64/numa: fix type info

Ganapatrao Kulkarni-2
In reply to this post by Zhen Lei
On Wed, May 25, 2016 at 7:43 PM, Zhen Lei <[hidden email]> wrote:

> numa_init(of_numa_init) may returned error because of numa configuration
> error. So "No NUMA configuration found" is inaccurate. In fact, specific
> configuration error information can be immediately printed by the
> testing branch. So "No NUMA..." only needs to be printed when numa_off.
>
> Signed-off-by: Zhen Lei <[hidden email]>
> ---
>  arch/arm64/mm/numa.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
> index 98dc104..9937cc1 100644
> --- a/arch/arm64/mm/numa.c
> +++ b/arch/arm64/mm/numa.c
> @@ -362,7 +362,8 @@ static int __init dummy_numa_init(void)
>         int ret;
>         struct memblock_region *mblk;
>
> -       pr_info("%s\n", "No NUMA configuration found");
> +       if (numa_off)

IIRC, it should be
if (!numa_off)
we want to print this message when we failed to find proper numa configuration.
when numa_off is set, we will not look for any numa configuration.

> +               pr_info("%s\n", "No NUMA configuration found");
>         pr_info("NUMA: Faking a node at [mem %#018Lx-%#018Lx]\n",
>                0LLU, PFN_PHYS(max_pfn) - 1);
>
> --
> 2.5.0

ganapat
>
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> [hidden email]
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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Re: [PATCH 3/3] arm64/numa: fix type info

Joe Perches
On Thu, 2016-05-26 at 09:22 -0700, Ganapatrao Kulkarni wrote:
> On Wed, May 25, 2016 at 7:43 PM, Zhen Lei <[hidden email]> wrote:
> > numa_init(of_numa_init) may returned error because of numa configuration
> > error. So "No NUMA configuration found" is inaccurate. In fact, specific
> > configuration error information can be immediately printed by the
> > testing branch. So "No NUMA..." only needs to be printed when numa_off.
[]
> > diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
[]

> > @@ -362,7 +362,8 @@ static int __init dummy_numa_init(void)
> >         int ret;
> >         struct memblock_region *mblk;
> >
> > -       pr_info("%s\n", "No NUMA configuration found");
> > +       if (numa_off)
> IIRC, it should be
> if (!numa_off)
> we want to print this message when we failed to find proper numa configuration.
> when numa_off is set, we will not look for any numa configuration.
>
> >
> > +               pr_info("%s\n", "No NUMA configuration found");

trivia:

Using printk("%s\n", "string") just makes the object code larger
for no particular benefit.

        pr_info("No NUMA configuration found\n");

would be smaller, faster and more intelligible for humans too.

Maybe something like this:
---
 arch/arm64/mm/numa.c | 41 ++++++++++++++++++++---------------------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index 98dc104..2042452 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -17,6 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define pr_fmt(fmt) "NUMA: " fmt
+
 #include <linux/bootmem.h>
 #include <linux/memblock.h>
 #include <linux/module.h>
@@ -36,7 +38,7 @@ static __init int numa_parse_early_param(char *opt)
  if (!opt)
  return -EINVAL;
  if (!strncmp(opt, "off", 3)) {
- pr_info("%s\n", "NUMA turned off");
+ pr_info("NUMA turned off\n");
  numa_off = 1;
  }
  return 0;
@@ -107,7 +109,7 @@ static void __init setup_node_to_cpumask_map(void)
  set_cpu_numa_node(cpu, NUMA_NO_NODE);
 
  /* cpumask_of_node() will now work */
- pr_debug("NUMA: Node to cpumask map for %d nodes\n", nr_node_ids);
+ pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
 }
 
 /*
@@ -142,14 +144,14 @@ int __init numa_add_memblk(int nid, u64 start, u64 size)
 
  ret = memblock_set_node(start, size, &memblock.memory, nid);
  if (ret < 0) {
- pr_err("NUMA: memblock [0x%llx - 0x%llx] failed to add on node %d\n",
- start, (start + size - 1), nid);
+ pr_err("memblock [0x%llx - 0x%llx] failed to add on node %d\n",
+        start, (start + size - 1), nid);
  return ret;
  }
 
  node_set(nid, numa_nodes_parsed);
- pr_info("NUMA: Adding memblock [0x%llx - 0x%llx] on node %d\n",
- start, (start + size - 1), nid);
+ pr_info("Adding memblock [0x%llx - 0x%llx] on node %d\n",
+ start, (start + size - 1), nid);
  return ret;
 }
 
@@ -163,19 +165,18 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
  void *nd;
  int tnid;
 
- pr_info("NUMA: Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
- nid, start_pfn << PAGE_SHIFT,
- (end_pfn << PAGE_SHIFT) - 1);
+ pr_info("Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
+ nid, start_pfn << PAGE_SHIFT, (end_pfn << PAGE_SHIFT) - 1);
 
  nd_pa = memblock_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
  nd = __va(nd_pa);
 
  /* report and initialize */
- pr_info("NUMA: NODE_DATA [mem %#010Lx-%#010Lx]\n",
+ pr_info("NODE_DATA [mem %#010Lx-%#010Lx]\n",
  nd_pa, nd_pa + nd_size - 1);
  tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
  if (tnid != nid)
- pr_info("NUMA: NODE_DATA(%d) on node %d\n", nid, tnid);
+ pr_info("NODE_DATA(%d) on node %d\n", nid, tnid);
 
  node_data[nid] = nd;
  memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
@@ -232,8 +233,7 @@ static int __init numa_alloc_distance(void)
  numa_distance[i * numa_distance_cnt + j] = i == j ?
  LOCAL_DISTANCE : REMOTE_DISTANCE;
 
- pr_debug("NUMA: Initialized distance table, cnt=%d\n",
- numa_distance_cnt);
+ pr_debug("Initialized distance table, cnt=%d\n", numa_distance_cnt);
 
  return 0;
 }
@@ -254,20 +254,20 @@ static int __init numa_alloc_distance(void)
 void __init numa_set_distance(int from, int to, int distance)
 {
  if (!numa_distance) {
- pr_warn_once("NUMA: Warning: distance table not allocated yet\n");
+ pr_warn_once("Warning: distance table not allocated yet\n");
  return;
  }
 
  if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
  from < 0 || to < 0) {
- pr_warn_once("NUMA: Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
-     from, to, distance);
+ pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
+      from, to, distance);
  return;
  }
 
  if ((u8)distance != distance ||
      (from == to && distance != LOCAL_DISTANCE)) {
- pr_warn_once("NUMA: Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
+ pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
       from, to, distance);
  return;
  }
@@ -294,7 +294,7 @@ static int __init numa_register_nodes(void)
  /* Check that valid nid is set to memblks */
  for_each_memblock(memory, mblk)
  if (mblk->nid == NUMA_NO_NODE || mblk->nid >= MAX_NUMNODES) {
- pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
+ pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
  mblk->nid, mblk->base,
  mblk->base + mblk->size - 1);
  return -EINVAL;
@@ -362,9 +362,8 @@ static int __init dummy_numa_init(void)
  int ret;
  struct memblock_region *mblk;
 
- pr_info("%s\n", "No NUMA configuration found");
- pr_info("NUMA: Faking a node at [mem %#018Lx-%#018Lx]\n",
-        0LLU, PFN_PHYS(max_pfn) - 1);
+ pr_info("No NUMA configuration found - faking a node at [mem %#018Lx-%#018Lx]\n",
+ 0LLU, PFN_PHYS(max_pfn) - 1);
 
  for_each_memblock(memory, mblk) {
  ret = numa_add_memblk(0, mblk->base, mblk->size);
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Re: [PATCH 3/3] arm64/numa: fix type info

David Daney-5
The current patch to correct this problem is here:

https://lkml.org/lkml/2016/5/24/679

Since v7 of the ACPI/NUMA patches are likely going to be added to
linux-next as soon as the current merge window ends, further
simplifications of the informational prints should probably be rebased
on top of it.

David Daney

On 05/26/2016 09:35 AM, Joe Perches wrote:

> On Thu, 2016-05-26 at 09:22 -0700, Ganapatrao Kulkarni wrote:
>> On Wed, May 25, 2016 at 7:43 PM, Zhen Lei <[hidden email]> wrote:
>>> numa_init(of_numa_init) may returned error because of numa configuration
>>> error. So "No NUMA configuration found" is inaccurate. In fact, specific
>>> configuration error information can be immediately printed by the
>>> testing branch. So "No NUMA..." only needs to be printed when numa_off.
> []
>>> diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
> []
>>> @@ -362,7 +362,8 @@ static int __init dummy_numa_init(void)
>>>          int ret;
>>>          struct memblock_region *mblk;
>>>
>>> -       pr_info("%s\n", "No NUMA configuration found");
>>> +       if (numa_off)
>> IIRC, it should be
>> if (!numa_off)
>> we want to print this message when we failed to find proper numa configuration.
>> when numa_off is set, we will not look for any numa configuration.
>>
>>>
>>> +               pr_info("%s\n", "No NUMA configuration found");
>
> trivia:
>
> Using printk("%s\n", "string") just makes the object code larger
> for no particular benefit.
>
> pr_info("No NUMA configuration found\n");
>
> would be smaller, faster and more intelligible for humans too.
>
> Maybe something like this:
> ---
>   arch/arm64/mm/numa.c | 41 ++++++++++++++++++++---------------------
>   1 file changed, 20 insertions(+), 21 deletions(-)
>
> diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
> index 98dc104..2042452 100644
> --- a/arch/arm64/mm/numa.c
> +++ b/arch/arm64/mm/numa.c
> @@ -17,6 +17,8 @@
>    * along with this program.  If not, see <http://www.gnu.org/licenses/>.
>    */
>
> +#define pr_fmt(fmt) "NUMA: " fmt
> +
>   #include <linux/bootmem.h>
>   #include <linux/memblock.h>
>   #include <linux/module.h>
> @@ -36,7 +38,7 @@ static __init int numa_parse_early_param(char *opt)
>   if (!opt)
>   return -EINVAL;
>   if (!strncmp(opt, "off", 3)) {
> - pr_info("%s\n", "NUMA turned off");
> + pr_info("NUMA turned off\n");
>   numa_off = 1;
>   }
>   return 0;
> @@ -107,7 +109,7 @@ static void __init setup_node_to_cpumask_map(void)
>   set_cpu_numa_node(cpu, NUMA_NO_NODE);
>
>   /* cpumask_of_node() will now work */
> - pr_debug("NUMA: Node to cpumask map for %d nodes\n", nr_node_ids);
> + pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
>   }
>
>   /*
> @@ -142,14 +144,14 @@ int __init numa_add_memblk(int nid, u64 start, u64 size)
>
>   ret = memblock_set_node(start, size, &memblock.memory, nid);
>   if (ret < 0) {
> - pr_err("NUMA: memblock [0x%llx - 0x%llx] failed to add on node %d\n",
> - start, (start + size - 1), nid);
> + pr_err("memblock [0x%llx - 0x%llx] failed to add on node %d\n",
> +       start, (start + size - 1), nid);
>   return ret;
>   }
>
>   node_set(nid, numa_nodes_parsed);
> - pr_info("NUMA: Adding memblock [0x%llx - 0x%llx] on node %d\n",
> - start, (start + size - 1), nid);
> + pr_info("Adding memblock [0x%llx - 0x%llx] on node %d\n",
> + start, (start + size - 1), nid);
>   return ret;
>   }
>
> @@ -163,19 +165,18 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
>   void *nd;
>   int tnid;
>
> - pr_info("NUMA: Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
> - nid, start_pfn << PAGE_SHIFT,
> - (end_pfn << PAGE_SHIFT) - 1);
> + pr_info("Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
> + nid, start_pfn << PAGE_SHIFT, (end_pfn << PAGE_SHIFT) - 1);
>
>   nd_pa = memblock_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
>   nd = __va(nd_pa);
>
>   /* report and initialize */
> - pr_info("NUMA: NODE_DATA [mem %#010Lx-%#010Lx]\n",
> + pr_info("NODE_DATA [mem %#010Lx-%#010Lx]\n",
>   nd_pa, nd_pa + nd_size - 1);
>   tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
>   if (tnid != nid)
> - pr_info("NUMA: NODE_DATA(%d) on node %d\n", nid, tnid);
> + pr_info("NODE_DATA(%d) on node %d\n", nid, tnid);
>
>   node_data[nid] = nd;
>   memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
> @@ -232,8 +233,7 @@ static int __init numa_alloc_distance(void)
>   numa_distance[i * numa_distance_cnt + j] = i == j ?
>   LOCAL_DISTANCE : REMOTE_DISTANCE;
>
> - pr_debug("NUMA: Initialized distance table, cnt=%d\n",
> - numa_distance_cnt);
> + pr_debug("Initialized distance table, cnt=%d\n", numa_distance_cnt);
>
>   return 0;
>   }
> @@ -254,20 +254,20 @@ static int __init numa_alloc_distance(void)
>   void __init numa_set_distance(int from, int to, int distance)
>   {
>   if (!numa_distance) {
> - pr_warn_once("NUMA: Warning: distance table not allocated yet\n");
> + pr_warn_once("Warning: distance table not allocated yet\n");
>   return;
>   }
>
>   if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
>   from < 0 || to < 0) {
> - pr_warn_once("NUMA: Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
> -    from, to, distance);
> + pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
> +     from, to, distance);
>   return;
>   }
>
>   if ((u8)distance != distance ||
>      (from == to && distance != LOCAL_DISTANCE)) {
> - pr_warn_once("NUMA: Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
> + pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
>       from, to, distance);
>   return;
>   }
> @@ -294,7 +294,7 @@ static int __init numa_register_nodes(void)
>   /* Check that valid nid is set to memblks */
>   for_each_memblock(memory, mblk)
>   if (mblk->nid == NUMA_NO_NODE || mblk->nid >= MAX_NUMNODES) {
> - pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
> + pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
>   mblk->nid, mblk->base,
>   mblk->base + mblk->size - 1);
>   return -EINVAL;
> @@ -362,9 +362,8 @@ static int __init dummy_numa_init(void)
>   int ret;
>   struct memblock_region *mblk;
>
> - pr_info("%s\n", "No NUMA configuration found");
> - pr_info("NUMA: Faking a node at [mem %#018Lx-%#018Lx]\n",
> -       0LLU, PFN_PHYS(max_pfn) - 1);
> + pr_info("No NUMA configuration found - faking a node at [mem %#018Lx-%#018Lx]\n",
> + 0LLU, PFN_PHYS(max_pfn) - 1);
>
>   for_each_memblock(memory, mblk) {
>   ret = numa_add_memblk(0, mblk->base, mblk->size);
>
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