Displaying 14 results from an estimated 14 matches for "vm_mergeable".
2017 Jul 31
5
[PATCH] mm: don't zero ballooned pages
On 07/31/2017 02:55 PM, Michal Hocko wrote:
> On Mon 31-07-17 12:13:33, Wei Wang wrote:
>> Ballooned pages will be marked as MADV_DONTNEED by the hypervisor and
>> shouldn't be given to the host ksmd to scan.
> Could you point me where this MADV_DONTNEED is done, please?
Sure. It's done in the hypervisor when the balloon pages are received.
Please see line 40 at
2017 Jul 31
5
[PATCH] mm: don't zero ballooned pages
On 07/31/2017 02:55 PM, Michal Hocko wrote:
> On Mon 31-07-17 12:13:33, Wei Wang wrote:
>> Ballooned pages will be marked as MADV_DONTNEED by the hypervisor and
>> shouldn't be given to the host ksmd to scan.
> Could you point me where this MADV_DONTNEED is done, please?
Sure. It's done in the hypervisor when the balloon pages are received.
Please see line 40 at
2017 Jul 31
0
[PATCH] mm: don't zero ballooned pages
...ter/hw/virtio/virtio-balloon.c
> >And one more thing. I am not familiar with ksm much. But how is
> >MADV_DONTNEED even helping? This madvise is not sticky - aka it will
> >unmap the range without leaving any note behind. AFAICS the only way
> >to have vma scanned is to have VM_MERGEABLE and that is an opt in:
> >See Documentation/vm/ksm.txt
> >"
> >KSM only operates on those areas of address space which an application
> >has advised to be likely candidates for merging, by using the madvise(2)
> >system call: int madvise(addr, length, MADV_MERGEAB...
2016 May 27
2
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...;
Interesting, let's see how that works out...
Overal this looks much better than the last version I checked!
[...]
> @@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
> * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
> *
> * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
> - * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
> - * and then page->mapping points, not to an anon_vma, but to a private
> + * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
> + * bit; and then...
2016 May 27
2
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...;
Interesting, let's see how that works out...
Overal this looks much better than the last version I checked!
[...]
> @@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
> * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
> *
> * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
> - * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
> - * and then page->mapping points, not to an anon_vma, but to a private
> + * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
> + * bit; and then...
2016 May 30
0
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...>
> Overal this looks much better than the last version I checked!
Thanks.
>
> [...]
>
> >@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
> > * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
> > *
> > * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
> >- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
> >- * and then page->mapping points, not to an anon_vma, but to a private
> >+ * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
> >+...
2016 May 20
5
[PATCH v6 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 20
5
[PATCH v6 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 20
0
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...ags */
PG_double_map = PG_private_2,
+
+ /* non-lru isolated movable page */
+ PG_isolated = PG_reclaim,
};
#ifndef __GENERATING_BOUNDS_H
@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
* with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
*
* On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
- * and then page->mapping points, not to an anon_vma, but to a private
+ * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
+ * bit; and then page->mapping po...
2016 May 31
0
[PATCH v6v3 02/12] mm: migrate: support non-lru movable page migration
...ags */
PG_double_map = PG_private_2,
+
+ /* non-lru isolated movable page */
+ PG_isolated = PG_reclaim,
};
#ifndef __GENERATING_BOUNDS_H
@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
* with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
*
* On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
- * and then page->mapping points, not to an anon_vma, but to a private
+ * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
+ * bit; and then page->mapping po...
2016 May 30
5
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...ags */
PG_double_map = PG_private_2,
+
+ /* non-lru isolated movable page */
+ PG_isolated = PG_reclaim,
};
#ifndef __GENERATING_BOUNDS_H
@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
* with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
*
* On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
- * and then page->mapping points, not to an anon_vma, but to a private
+ * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
+ * bit; and then page->mapping po...
2016 May 30
5
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...ags */
PG_double_map = PG_private_2,
+
+ /* non-lru isolated movable page */
+ PG_isolated = PG_reclaim,
};
#ifndef __GENERATING_BOUNDS_H
@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY)
* with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
*
* On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
- * and then page->mapping points, not to an anon_vma, but to a private
+ * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
+ * bit; and then page->mapping po...
2016 May 31
7
[PATCH v7 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 31
7
[PATCH v7 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot