Displaying 20 results from an estimated 38 matches for "online_pages".
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2010 Aug 06
5
[PATCH] GSoC 2010 - Memory hotplug support for Xen guests - second fully working version - once again
...include <xen/balloon.h>
-#endif
-
#define MEMORY_CLASS_NAME "memory"
static struct sysdev_class memory_sysdev_class = {
@@ -223,10 +215,6 @@ memory_block_action(struct memory_block *mem, unsigned long action)
case MEM_ONLINE:
start_pfn = page_to_pfn(first_page);
ret = online_pages(start_pfn, PAGES_PER_SECTION);
-#if defined(CONFIG_XEN_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
- if (xen_domain() && !ret)
- balloon_update_stats(PAGES_PER_SECTION);
-#endif
break;
case MEM_OFFLINE:
mem->state = MEM_GOING_OFFLINE;
@@ -237,10 +225,6 @@ memor...
2019 Oct 16
1
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
...er we online memory the memmap is overwritten,
> because there is no way you could tell it contains garbage or not. You have
> to assume it is garbage. (my recent patch even poisons the memmap when
> offlining, which helped to find a lot of these "garbage memmap" BUGs)
>
> online_pages()
> ...
> move_pfn_range_to_zone(zone, pfn, nr_pages, NULL);
> ...
> memmap_init_zone()
> -> memmap initialized
>
> So yes, offlining memory with HWPoison and re-onlining it effectively drops
> HWPoison markers. On the next access, you will trigger a new HWPoison...
2010 Aug 12
13
[PATCH] GSoC 2010 - Memory hotplug support for Xen guests - third fully working version
...y_resource_reserved()) {
> > +
> > + /*
> > + * Look for first unused memory region starting at page
> > + * boundary. Skip last memory section created at boot time
> > + * becuase it may contains unused memory pages with PG_reserved
> > + * bit not set (online_pages require PG_reserved bit set).
> > + */
> > +
> > + r = kzalloc(sizeof(struct resource), GFP_KERNEL);
>
> You are holding a spinlock here. Kzalloc can sleep
Thx. Fixed.
On Fri, Aug 06, 2010 at 10:42:48AM -0700, Jeremy Fitzhardinge wrote:
> > - PV on HVM mode is s...
2019 Oct 16
0
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
...rry to say, but whenever we online memory the memmap is overwritten,
because there is no way you could tell it contains garbage or not. You
have to assume it is garbage. (my recent patch even poisons the memmap
when offlining, which helped to find a lot of these "garbage memmap" BUGs)
online_pages()
...
move_pfn_range_to_zone(zone, pfn, nr_pages, NULL);
...
memmap_init_zone()
-> memmap initialized
So yes, offlining memory with HWPoison and re-onlining it effectively
drops HWPoison markers. On the next access, you will trigger a new HWPoison.
>
>> The driver that marke...
2019 Oct 16
3
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
On Wed 16-10-19 14:50:30, David Hildenbrand wrote:
> On 16.10.19 13:43, Michal Hocko wrote:
> > On Thu 19-09-19 16:22:25, David Hildenbrand wrote:
> > > virtio-mem wants to allow to offline memory blocks of which some parts
> > > were unplugged, especially, to later offline and remove completely
> > > unplugged memory blocks. The important part is that
2019 Oct 16
3
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
On Wed 16-10-19 14:50:30, David Hildenbrand wrote:
> On 16.10.19 13:43, Michal Hocko wrote:
> > On Thu 19-09-19 16:22:25, David Hildenbrand wrote:
> > > virtio-mem wants to allow to offline memory blocks of which some parts
> > > were unplugged, especially, to later offline and remove completely
> > > unplugged memory blocks. The important part is that
2020 Apr 30
2
[PATCH v1 2/3] mm/memory_hotplug: Introduce MHP_DRIVER_MANAGED
.../* create new memmap entry */
> - firmware_map_add_hotplug(start, start + size, "System RAM");
> + if (!(flags & MHP_DRIVER_MANAGED))
> + firmware_map_add_hotplug(start, start + size, "System RAM");
>
> /* device_online() will take the lock when calling online_pages() */
> mem_hotplug_done();
> @@ -1081,10 +1082,21 @@ int __ref add_memory_resource(int nid, struct resource *res,
> /* requires device_hotplug_lock, see add_memory_resource() */
> int __ref __add_memory(int nid, u64 start, u64 size, unsigned long flags)
> {
> + const char *re...
2020 Apr 30
2
[PATCH v1 2/3] mm/memory_hotplug: Introduce MHP_DRIVER_MANAGED
.../* create new memmap entry */
> - firmware_map_add_hotplug(start, start + size, "System RAM");
> + if (!(flags & MHP_DRIVER_MANAGED))
> + firmware_map_add_hotplug(start, start + size, "System RAM");
>
> /* device_online() will take the lock when calling online_pages() */
> mem_hotplug_done();
> @@ -1081,10 +1082,21 @@ int __ref add_memory_resource(int nid, struct resource *res,
> /* requires device_hotplug_lock, see add_memory_resource() */
> int __ref __add_memory(int nid, u64 start, u64 size, unsigned long flags)
> {
> + const char *re...
2013 May 26
6
[PATCH v8, part3 12/14] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -983,7 +976,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
pgdat_resize_lock(zone->zone_pgdat, &flags);
@@ -1572,15 +1564,13 @@ repeat:
/* reset pagetype flags and makes migrate ty...
2013 May 26
6
[PATCH v8, part3 12/14] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -983,7 +976,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
pgdat_resize_lock(zone->zone_pgdat, &flags);
@@ -1572,15 +1564,13 @@ repeat:
/* reset pagetype flags and makes migrate ty...
2013 May 26
6
[PATCH v8, part3 12/14] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -983,7 +976,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
pgdat_resize_lock(zone->zone_pgdat, &flags);
@@ -1572,15 +1564,13 @@ repeat:
/* reset pagetype flags and makes migrate ty...
2020 Apr 30
0
[PATCH v2 2/3] mm/memory_hotplug: Introduce MHP_NO_FIRMWARE_MEMMAP
...es,
BUG_ON(ret);
/* create new memmap entry */
- firmware_map_add_hotplug(start, start + size, "System RAM");
+ if (!(flags & MHP_NO_FIRMWARE_MEMMAP))
+ firmware_map_add_hotplug(start, start + size, "System RAM");
/* device_online() will take the lock when calling online_pages() */
mem_hotplug_done();
--
2.25.3
2020 Apr 29
0
[PATCH v1 2/3] mm/memory_hotplug: Introduce MHP_DRIVER_MANAGED
...e *res,
BUG_ON(ret);
/* create new memmap entry */
- firmware_map_add_hotplug(start, start + size, "System RAM");
+ if (!(flags & MHP_DRIVER_MANAGED))
+ firmware_map_add_hotplug(start, start + size, "System RAM");
/* device_online() will take the lock when calling online_pages() */
mem_hotplug_done();
@@ -1081,10 +1082,21 @@ int __ref add_memory_resource(int nid, struct resource *res,
/* requires device_hotplug_lock, see add_memory_resource() */
int __ref __add_memory(int nid, u64 start, u64 size, unsigned long flags)
{
+ const char *resource_name = "System RAM...
2020 Apr 30
0
[PATCH v1 2/3] mm/memory_hotplug: Introduce MHP_DRIVER_MANAGED
...firmware_map_add_hotplug(start, start + size, "System RAM");
> > + if (!(flags & MHP_DRIVER_MANAGED))
> > + firmware_map_add_hotplug(start, start + size, "System RAM");
> >
> > /* device_online() will take the lock when calling online_pages() */
> > mem_hotplug_done();
> > @@ -1081,10 +1082,21 @@ int __ref add_memory_resource(int nid, struct resource *res,
> > /* requires device_hotplug_lock, see add_memory_resource() */
> > int __ref __add_memory(int nid, u64 start, u64 size, unsigned long flags)
>...
2013 May 11
0
[PATCH v6, part3 13/16] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -979,7 +972,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
zone->zone_pgdat->node_present_pages += onlined_pages;
if (onlined_pages) {
@@ -1563,10 +1555,9 @@ repeat:
/* reset pagety...
2013 May 11
0
[PATCH v6, part3 13/16] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -979,7 +972,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
zone->zone_pgdat->node_present_pages += onlined_pages;
if (onlined_pages) {
@@ -1563,10 +1555,9 @@ repeat:
/* reset pagety...
2013 May 11
0
[PATCH v6, part3 13/16] mm: correctly update zone->mamaged_pages
...count(page, 1);
}
EXPORT_SYMBOL_GPL(__online_page_increment_counters);
void __online_page_free(struct page *page)
{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
+ __free_reserved_page(page);
}
EXPORT_SYMBOL_GPL(__online_page_free);
@@ -979,7 +972,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
return ret;
}
- zone->managed_pages += onlined_pages;
zone->present_pages += onlined_pages;
zone->zone_pgdat->node_present_pages += onlined_pages;
if (onlined_pages) {
@@ -1563,10 +1555,9 @@ repeat:
/* reset pagety...
2020 Mar 02
0
[PATCH v1 02/11] virtio-mem: Paravirtualized memory hotplug
Each virtio-mem device owns exactly one memory region. It is responsible
for adding/removing memory from that memory region on request.
When the device driver starts up, the requested amount of memory is
queried and then plugged to Linux. On request, further memory can be
plugged or unplugged. This patch only implements the plugging part.
On x86-64, memory can currently be plugged in 4MB
2020 Apr 30
5
[PATCH v2 0/3] mm/memory_hotplug: Allow to not create firmware memmap entries
This is the follow up of [1]:
[PATCH v1 0/3] mm/memory_hotplug: Make virtio-mem play nicely with
kexec-tools
I realized that this is not only helpful for virtio-mem, but also for
dax/kmem - it's a fix for that use case (see patch #3) of persistent
memory.
Also, while testing, I discovered that kexec-tools will *not* add dax/kmem
memory (anything not directly under the root when parsing
2020 Apr 29
4
[PATCH v1 0/3] mm/memory_hotplug: Make virtio-mem play nicely with kexec-tools
This series is based on [1]:
[PATCH v2 00/10] virtio-mem: paravirtualized memory
That will hopefull get picked up soon, rebased to -next.
The following patches were reverted from -next [2]:
[PATCH 0/3] kexec/memory_hotplug: Prevent removal and accidental use
As discussed in that thread, they should be reverted from -next already.
In theory, if people agree, we could take the first two patches