linux-toradex.git/mm/mempolicy.c, branch v3.12.12

mm/mempolicy.c: fix mempolicy printing in numa_maps

2014-02-06T19:22:14+00:00

commit 8790c71a18e5d2d93532ae250bcf5eddbba729cd upstream.

As a result of commit 5606e3877ad8 ("mm: numa: Migrate on reference
policy"), /proc//numa_maps prints the mempolicy for any  as
"prefer:N" for the local node, N, of the process reading the file.

This should only be printed when the mempolicy of  is
MPOL_PREFERRED for node N.

If the process is actually only using the default mempolicy for local
node allocation, make sure "default" is printed as expected.

Signed-off-by: David Rientjes 
Reported-by: Robert Lippert 
Cc: Peter Zijlstra 
Acked-by: Mel Gorman 
Cc: Ingo Molnar 
Cc: 	[3.7+]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

mm/mempolicy: correct putback method for isolate pages if failed

2014-01-09T20:25:14+00:00

commit b0e5fd7359f1ce8db4ccb862b3aa80d2f2cbf4d0 upstream.

queue_pages_range() isolates hugetlbfs pages and putback_lru_pages()
can't handle these.  We should change it to putback_movable_pages().

Naoya said that it is worth going into stable, because it can break
in-use hugepage list.

Signed-off-by: Joonsoo Kim 
Acked-by: Rafael Aquini 
Reviewed-by: Naoya Horiguchi 
Reviewed-by: Wanpeng Li 
Cc: Christoph Lameter 
Cc: Vlastimil Babka 
Cc: Wanpeng Li 
Cc: Mel Gorman 
Cc: Rik van Riel 
Cc: Vlastimil Babka 
Cc: Zhang Yanfei 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

mbind: add BUG_ON(!vma) in new_vma_page()

2013-09-11T22:57:50+00:00

new_vma_page() is called only by page migration called from do_mbind(),
where pages to be migrated are queued into a pagelist by
queue_pages_range().  queue_pages_range() confirms that a queued page
belongs to some vma, so !vma case is not supposed to be happen.  This
patch adds BUG_ON() to catch this unexpected case.

Signed-off-by: Naoya Horiguchi 
Reported-by: Dan Carpenter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/mempolicy: rename check_range to queue_pages_range

2013-09-11T22:57:49+00:00

The function check_range() (and its family) is not well-named, because it
does not only checking something, but moving pages from list to list to do
page migration for them.  So queue_pages_*range is more desirable name.

Signed-off-by: Naoya Horiguchi 
Cc: Andi Kleen 
Cc: Wanpeng Li 
Cc: Hillf Danton 
Cc: Mel Gorman 
Cc: Hugh Dickins 
Cc: KOSAKI Motohiro 
Cc: Michal Hocko 
Cc: Rik van Riel 
Cc: "Aneesh Kumar K.V" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: mbind: add hugepage migration code to mbind()

2013-09-11T22:57:48+00:00

Extend do_mbind() to handle vma with VM_HUGETLB set.  We will be able to
migrate hugepage with mbind(2) after applying the enablement patch which
comes later in this series.

Signed-off-by: Naoya Horiguchi 
Acked-by: Andi Kleen 
Reviewed-by: Wanpeng Li 
Acked-by: Hillf Danton 
Cc: Mel Gorman 
Cc: Hugh Dickins 
Cc: KOSAKI Motohiro 
Cc: Michal Hocko 
Cc: Rik van Riel 
Cc: "Aneesh Kumar K.V" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

migrate: add hugepage migration code to migrate_pages()

2013-09-11T22:57:48+00:00

Extend check_range() to handle vma with VM_HUGETLB set.  We will be able
to migrate hugepage with migrate_pages(2) after applying the enablement
patch which comes later in this series.

Note that for larger hugepages (covered by pud entries, 1GB for x86_64 for
example), we simply skip it now.

Note that using pmd_huge/pud_huge assumes that hugepages are pointed to by
pmd/pud.  This is not true in some architectures implementing hugepage
with other mechanisms like ia64, but it's OK because pmd_huge/pud_huge
simply return 0 in such arch and page walker simply ignores such
hugepages.

Signed-off-by: Naoya Horiguchi 
Acked-by: Andi Kleen 
Reviewed-by: Wanpeng Li 
Acked-by: Hillf Danton 
Cc: Mel Gorman 
Cc: Hugh Dickins 
Cc: KOSAKI Motohiro 
Cc: Michal Hocko 
Cc: Rik van Riel 
Cc: "Aneesh Kumar K.V" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/mempolicy: return NULL if node is NUMA_NO_NODE in get_task_policy

2013-09-11T22:57:29+00:00

If node == NUMA_NO_NODE, pol is NULL, we should return NULL instead of
do "if (!pol->mode)" check.

[akpm@linux-foundation.org: reorganise code]
Signed-off-by: Jianguo Wu 
Cc: Mel Gorman 
Cc: KOSAKI Motohiro 
Cc: Rik van Riel 
Cc: Hugh Dickins 
Cc: Hanjun Guo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: mempolicy: turn vma_set_policy() into vma_dup_policy()

2013-09-11T22:57:00+00:00

Simple cleanup.  Every user of vma_set_policy() does the same work, this
looks a bit annoying imho.  And the new trivial helper which does
mpol_dup() + vma_set_policy() to simplify the callers.

Signed-off-by: Oleg Nesterov 
Cc: KOSAKI Motohiro 
Cc: Mel Gorman 
Cc: Rik van Riel 
Cc: Andi Kleen 
Cc: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: mempolicy: fix mbind_range() && vma_adjust() interaction

2013-07-31T21:41:02+00:00

vma_adjust() does vma_set_policy(vma, vma_policy(next)) and this
is doubly wrong:

1. This leaks vma->vm_policy if it is not NULL and not equal to
   next->vm_policy.

   This can happen if vma_merge() expands "area", not prev (case 8).

2. This sets the wrong policy if vma_merge() joins prev and area,
   area is the vma the caller needs to update and it still has the
   old policy.

Revert commit 1444f92c8498 ("mm: merging memory blocks resets
mempolicy") which introduced these problems.

Change mbind_range() to recheck mpol_equal() after vma_merge() to fix
the problem that commit tried to address.

Signed-off-by: Oleg Nesterov 
Acked-by: KOSAKI Motohiro 
Cc: Steven T Hampson 
Cc: Mel Gorman 
Cc: KOSAKI Motohiro 
Cc: Rik van Riel 
Cc: Andi Kleen 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/mempolicy.c: fix sp_node_init() argument ordering

2013-03-08T23:05:34+00:00

Currently, n_new is wrongly initialized.  start and end parameter are
inverted.  Let's fix it.

Signed-off-by: KOSAKI Motohiro 
Cc: Hillf Danton 
Cc: Sasha Levin 
Cc: Hugh Dickins 
Cc: Mel Gorman 
Cc: Dave Jones 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds