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x86-64, NUMA: Add proper function comments to global functions

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Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
This commit is contained in:
Tejun Heo 2011-02-22 11:10:08 +01:00
parent b8ef9172b2
commit 90e6b677b4
2 changed files with 69 additions and 10 deletions
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50
arch/x86/mm/numa_64.c
View File

@ -205,6 +205,14 @@ static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
return 0;
}
/**
* numa_remove_memblk_from - Remove one numa_memblk from a numa_meminfo
* @idx: Index of memblk to remove
* @mi: numa_meminfo to remove memblk from
*
* Remove @idx'th numa_memblk from @mi by shifting @mi->blk[] and
* decrementing @mi->nr_blks.
*/
void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi)
{
mi->nr_blks--;
@ -212,6 +220,17 @@ void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi)
(mi->nr_blks - idx) * sizeof(mi->blk[0]));
}
/**
* numa_add_memblk - Add one numa_memblk to numa_meminfo
* @nid: NUMA node ID of the new memblk
* @start: Start address of the new memblk
* @end: End address of the new memblk
*
* Add a new memblk to the default numa_meminfo.
*
* RETURNS:
* 0 on success, -errno on failure.
*/
int __init numa_add_memblk(int nid, u64 start, u64 end)
{
return numa_add_memblk_to(nid, start, end, &numa_meminfo);
@ -263,6 +282,16 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
node_set_online(nodeid);
}
/**
* numa_cleanup_meminfo - Cleanup a numa_meminfo
* @mi: numa_meminfo to clean up
*
* Sanitize @mi by merging and removing unncessary memblks. Also check for
* conflicts and clear unused memblks.
*
* RETURNS:
* 0 on success, -errno on failure.
*/
int __init numa_cleanup_meminfo(struct numa_meminfo *mi)
{
const u64 low = 0;
@ -353,9 +382,11 @@ static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask,
node_set(mi->blk[i].nid, *nodemask);
}
/*
* Reset distance table. The current table is freed. The next
* numa_set_distance() call will create a new one.
/**
* numa_reset_distance - Reset NUMA distance table
*
* The current table is freed. The next numa_set_distance() call will
* create a new one.
*/
void __init numa_reset_distance(void)
{
@ -370,10 +401,15 @@ void __init numa_reset_distance(void)
numa_distance = NULL;
}
/*
* Set the distance between node @from to @to to @distance. If distance
* table doesn't exist, one which is large enough to accomodate all the
* currently known nodes will be created.
/**
* numa_set_distance - Set NUMA distance from one NUMA to another
* @from: the 'from' node to set distance
* @to: the 'to' node to set distance
* @distance: NUMA distance
*
* Set the distance from node @from to @to to @distance. If distance table
* doesn't exist, one which is large enough to accomodate all the currently
* known nodes will be created.
*/
void __init numa_set_distance(int from, int to, int distance)
{

29
arch/x86/mm/numa_emulation.c
View File

@ -267,9 +267,32 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
return 0;
}
/*
* Sets up the system RAM area from start_pfn to last_pfn according to the
* numa=fake command-line option.
/**
* numa_emulation - Emulate NUMA nodes
* @numa_meminfo: NUMA configuration to massage
* @numa_dist_cnt: The size of the physical NUMA distance table
*
* Emulate NUMA nodes according to the numa=fake kernel parameter.
* @numa_meminfo contains the physical memory configuration and is modified
* to reflect the emulated configuration on success. @numa_dist_cnt is
* used to determine the size of the physical distance table.
*
* On success, the following modifications are made.
*
* - @numa_meminfo is updated to reflect the emulated nodes.
*
* - __apicid_to_node[] is updated such that APIC IDs are mapped to the
* emulated nodes.
*
* - NUMA distance table is rebuilt to represent distances between emulated
* nodes. The distances are determined considering how emulated nodes
* are mapped to physical nodes and match the actual distances.
*
* - emu_nid_to_phys[] reflects how emulated nodes are mapped to physical
* nodes. This is used by numa_add_cpu() and numa_remove_cpu().
*
* If emulation is not enabled or fails, emu_nid_to_phys[] is filled with
* identity mapping and no other modification is made.
*/
void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
{