Re: [PATCH v3 3/3] mm/page_alloc: Keep memoryless cpuless node 0 offline

2020-05-08 Thread Srikar Dronamraju
* Christopher Lameter [2020-05-02 23:05:28]: > On Fri, 1 May 2020, Srikar Dronamraju wrote: > > > --- a/mm/page_alloc.c > > +++ b/mm/page_alloc.c > > @@ -116,8 +116,10 @@ EXPORT_SYMBOL(latent_entropy); > > */ > > nodemask_t node_states[NR_NODE_STATES] __read_mostly = { > > [N_POSSIBLE] =

Re: [PATCH v3 3/3] mm/page_alloc: Keep memoryless cpuless node 0 offline

2020-05-02 Thread Christopher Lameter
On Fri, 1 May 2020, Srikar Dronamraju wrote: > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -116,8 +116,10 @@ EXPORT_SYMBOL(latent_entropy); > */ > nodemask_t node_states[NR_NODE_STATES] __read_mostly = { > [N_POSSIBLE] = NODE_MASK_ALL, > +#ifdef CONFIG_NUMA > + [N_ONLINE] = NOD

[PATCH v3 3/3] mm/page_alloc: Keep memoryless cpuless node 0 offline

2020-04-30 Thread Srikar Dronamraju
Currently Linux kernel with CONFIG_NUMA on a system with multiple possible nodes, marks node 0 as online at boot. However in practice, there are systems which have node 0 as memoryless and cpuless. This can cause numa_balancing to be enabled on systems with only one node with memory and CPUs. The