lkml.org 
[lkml]   [2010]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] [3/4] SLAB: Set up the l3 lists for the memory of freshly added memory v2
    On Thu, 11 Feb 2010, Andi Kleen wrote:

    > Index: linux-2.6.32-memhotadd/mm/slab.c
    > ===================================================================
    > --- linux-2.6.32-memhotadd.orig/mm/slab.c
    > +++ linux-2.6.32-memhotadd/mm/slab.c
    > @@ -115,6 +115,7 @@
    > #include <linux/reciprocal_div.h>
    > #include <linux/debugobjects.h>
    > #include <linux/kmemcheck.h>
    > +#include <linux/memory.h>
    >
    > #include <asm/cacheflush.h>
    > #include <asm/tlbflush.h>
    > @@ -1554,6 +1555,23 @@ void __init kmem_cache_init(void)
    > g_cpucache_up = EARLY;
    > }
    >
    > +static int slab_memory_callback(struct notifier_block *self,
    > + unsigned long action, void *arg)
    > +{
    > + struct memory_notify *mn = (struct memory_notify *)arg;
    > +
    > + /*
    > + * When a node goes online allocate l3s early. This way
    > + * kmalloc_node() works for it.
    > + */
    > + if (action == MEM_ONLINE && mn->status_change_nid >= 0) {
    > + mutex_lock(&cache_chain_mutex);
    > + slab_node_prepare(mn->status_change_nid);
    > + mutex_unlock(&cache_chain_mutex);
    > + }
    > + return NOTIFY_OK;
    > +}
    > +
    > void __init kmem_cache_init_late(void)
    > {
    > struct kmem_cache *cachep;
    > @@ -1577,6 +1595,8 @@ void __init kmem_cache_init_late(void)
    > */
    > register_cpu_notifier(&cpucache_notifier);
    >
    > + hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
    > +

    Only needed for CONFIG_NUMA, but there's no side-effects for UMA kernels
    since status_change_nid will always be -1.

    Acked-by: David Rientjes <rientjes@google.com>


    \
     
     \ /
      Last update: 2010-02-11 22:47    [W:0.023 / U:90.528 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site