luck/tmp_suning_uos_patched
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x86, UV: Handle missing blade-local memory correctly

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UV blades may not have any blade-local memory. Add a field
(nid) to the UV blade structure to indicates whether the node
has local memory. This is needed by the GRU driver (pushed
separately).

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
LKML-Reference: <20090727143507.GA7006@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jack Steiner 2009-07-27 09:35:07 -05:00 committed by Ingo Molnar
parent f1f029c7bf
commit 6c7184b774
2 changed files with 12 additions and 0 deletions
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7
arch/x86/include/asm/uv/uv_hub.h
View File

@ -327,6 +327,7 @@ struct uv_blade_info {
unsigned short nr_possible_cpus;
unsigned short nr_online_cpus;
unsigned short pnode;
short memory_nid;
};
extern struct uv_blade_info *uv_blade_info;
extern short *uv_node_to_blade;
@ -363,6 +364,12 @@ static inline int uv_blade_to_pnode(int bid)
return uv_blade_info[bid].pnode;
}
/* Nid of memory node on blade. -1 if no blade-local memory */
static inline int uv_blade_to_memory_nid(int bid)
{
return uv_blade_info[bid].memory_nid;
}
/* Determine the number of possible cpus on a blade */
static inline int uv_blade_nr_possible_cpus(int bid)
{

5
arch/x86/kernel/apic/x2apic_uv_x.c
View File

@ -591,6 +591,8 @@ void __init uv_system_init(void)
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
uv_blade_info = kmalloc(bytes, GFP_KERNEL);
BUG_ON(!uv_blade_info);
for (blade = 0; blade < uv_num_possible_blades(); blade++)
uv_blade_info[blade].memory_nid = -1;
get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
@ -629,6 +631,9 @@ void __init uv_system_init(void)
lcpu = uv_blade_info[blade].nr_possible_cpus;
uv_blade_info[blade].nr_possible_cpus++;
/* Any node on the blade, else will contain -1. */
uv_blade_info[blade].memory_nid = nid;
uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
uv_cpu_hub_info(cpu)->m_val = m_val;