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| author | Wei Yang <richard.weiyang@gmail.com> | 2017-07-08 09:30:59 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 11:16:49 +0200 |
| commit | 4f167201edda7cd7525cc7f23944731ef5dd99a8 (patch) | |
| tree | 8ab7a84ce85810b08d0e6870d3be43721e294409 /arch/x86/mm/numa_emulation.c | |
| parent | d80a9eb3c78d7d0c823a8224cd6e3b37ebdfd8cd (diff) | |
| download | linux-4f167201edda7cd7525cc7f23944731ef5dd99a8.tar.bz2 | |
x86/numa_emulation: Recalculate numa_nodes_parsed from emulated nodes
When emulating NUMA, the kernel's emulated NUMA configuration may contain
more or less nodes than there are physical nodes.
In numa_emulation(), we recalculate numa_meminfo/numa_distance/__apicid_to_node
according to the number of emulated nodes, except numa_nodes_parsed, which is
arguably an omission.
Recalculate numa_nodes_parsed as well.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: bp@alien8.de
Cc: kirill@shutemov.name
Cc: tj@kernel.org
Link: http://lkml.kernel.org/r/20170708013059.29708-4-richard.weiyang@gmail.com
[ Changelog fixes. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/numa_emulation.c')
| -rw-r--r-- | arch/x86/mm/numa_emulation.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c index 80904ede2e7f..d805162e6045 100644 --- a/arch/x86/mm/numa_emulation.c +++ b/arch/x86/mm/numa_emulation.c @@ -395,6 +395,13 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt) /* commit */ *numa_meminfo = ei; + /* Make sure numa_nodes_parsed only contains emulated nodes */ + nodes_clear(numa_nodes_parsed); + for (i = 0; i < ARRAY_SIZE(ei.blk); i++) + if (ei.blk[i].start != ei.blk[i].end && + ei.blk[i].nid != NUMA_NO_NODE) + node_set(ei.blk[i].nid, numa_nodes_parsed); + /* * Transform __apicid_to_node table to use emulated nids by * reverse-mapping phys_nid. The maps should always exist but fall |