Messages in this thread | | | Date | Tue, 15 Apr 2008 14:19:20 -0700 | From | "Yinghai Lu" <> | Subject | Re: + bootmem-node-setup-agnostic-free_bootmem.patch added to -mm tree |
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On Tue, Apr 15, 2008 at 2:14 PM, Johannes Weiner <hannes@saeurebad.de> wrote: > Hi, > > "Yinghai Lu" <yhlu.kernel@gmail.com> writes: > > > >> > 2. intel cross node box: node0: 0g-2g, 4g-6g, node1: 2g-4g, 6g-8g. i > >> > don't think they have two bdata struct for every node. > >> > >> How do the bdata structures represent this setup right now? Are you > >> sure that there is not a node descriptor for every contiguous region? > > > > http://lkml.org/lkml/2008/3/25/233 > > > > Subject [patch] srat, x86_64: Add support for nodes spanning other nodes > > > > For example, If the physical address layout on a two node system with 8 GB > > memory is something like: > > node 0: 0-2GB, 4-6GB > > node 1: 2-4GB, 6-8GB > > > > Current kernels fail to boot/detect this NUMA topology. > > > > ACPI SRAT tables can expose such a topology which needs to be supported. > > > > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> > > As I understood the code (more guessing than understanding), it breaks > down these physical nodes into contiguous logical memory blocks which > then get represented by having a node descriptor for each of them. Can > you confirm that?
Not sure, on x86_64 one node should have one bdata only. execpt suresh update that to make one node have two bdata.
YH
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