linux-toradex.git/mm/memory-failure.c, branch v3.7

mm: soft offline: split thp at the beginning of soft_offline_page()

2012-11-30T16:51:18+00:00

When we try to soft-offline a thp tail page, put_page() is called on the
tail page unthinkingly and VM_BUG_ON is triggered in put_compound_page().

This patch splits thp before going into the main body of soft-offlining.

Signed-off-by: Naoya Horiguchi 
Cc: Andi Kleen 
Cc: Tony Luck 
Cc: Andi Kleen 
Cc: Wu Fengguang 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm anon rmap: replace same_anon_vma linked list with an interval tree.

2012-10-09T07:22:41+00:00

When a large VMA (anon or private file mapping) is first touched, which
will populate its anon_vma field, and then split into many regions through
the use of mprotect(), the original anon_vma ends up linking all of the
vmas on a linked list.  This can cause rmap to become inefficient, as we
have to walk potentially thousands of irrelevent vmas before finding the
one a given anon page might fall into.

By replacing the same_anon_vma linked list with an interval tree (where
each avc's interval is determined by its vma's start and last pgoffs), we
can make rmap efficient for this use case again.

While the change is large, all of its pieces are fairly simple.

Most places that were walking the same_anon_vma list were looking for a
known pgoff, so they can just use the anon_vma_interval_tree_foreach()
interval tree iterator instead.  The exception here is ksm, where the
page's index is not known.  It would probably be possible to rework ksm so
that the index would be known, but for now I have decided to keep things
simple and just walk the entirety of the interval tree there.

When updating vma's that already have an anon_vma assigned, we must take
care to re-index the corresponding avc's on their interval tree.  This is
done through the use of anon_vma_interval_tree_pre_update_vma() and
anon_vma_interval_tree_post_update_vma(), which remove the avc's from
their interval tree before the update and re-insert them after the update.
 The anon_vma stays locked during the update, so there is no chance that
rmap would miss the vmas that are being updated.

Signed-off-by: Michel Lespinasse 
Cc: Andrea Arcangeli 
Cc: Rik van Riel 
Cc: Peter Zijlstra 
Cc: Daniel Santos 
Cc: Hugh Dickins 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: replace vma prio_tree with an interval tree

2012-10-09T07:22:39+00:00

Implement an interval tree as a replacement for the VMA prio_tree.  The
algorithms are similar to lib/interval_tree.c; however that code can't be
directly reused as the interval endpoints are not explicitly stored in the
VMA.  So instead, the common algorithm is moved into a template and the
details (node type, how to get interval endpoints from the node, etc) are
filled in using the C preprocessor.

Once the interval tree functions are available, using them as a
replacement to the VMA prio tree is a relatively simple, mechanical job.

Signed-off-by: Michel Lespinasse 
Cc: Rik van Riel 
Cc: Hillf Danton 
Cc: Peter Zijlstra 
Cc: Catalin Marinas 
Cc: Andrea Arcangeli 
Cc: David Woodhouse 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

memcg: rename config variables

2012-08-01T01:42:43+00:00

Sanity:

CONFIG_CGROUP_MEM_RES_CTLR -> CONFIG_MEMCG
CONFIG_CGROUP_MEM_RES_CTLR_SWAP -> CONFIG_MEMCG_SWAP
CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED -> CONFIG_MEMCG_SWAP_ENABLED
CONFIG_CGROUP_MEM_RES_CTLR_KMEM -> CONFIG_MEMCG_KMEM

[mhocko@suse.cz: fix missed bits]
Cc: Glauber Costa 
Acked-by: Michal Hocko 
Cc: Johannes Weiner 
Cc: KAMEZAWA Hiroyuki 
Cc: Hugh Dickins 
Cc: Tejun Heo 
Cc: Aneesh Kumar K.V 
Cc: David Rientjes 
Cc: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hugetlb: simplify migrate_huge_page()

2012-08-01T01:42:40+00:00

Since we migrate only one hugepage, don't use linked list for passing the
page around.  Directly pass the page that need to be migrated as argument.
This also removes the usage of page->lru in the migrate path.

Signed-off-by: Aneesh Kumar K.V 
Reviewed-by: KAMEZAWA Hiroyuki 
Cc: David Rientjes 
Cc: Hillf Danton 
Reviewed-by: Michal Hocko 
Cc: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: fix wrong argument of migrate_huge_pages() in soft_offline_huge_page()

2012-07-31T00:25:11+00:00

Commit a6bc32b89922 ("mm: compaction: introduce sync-light migration for
use by compaction") changed the declaration of migrate_pages() and
migrate_huge_pages().

But it missed changing the argument of migrate_huge_pages() in
soft_offline_huge_page().  In this case, we should call
migrate_huge_pages() with MIGRATE_SYNC.

Additionally, there is a mismatch between type the of argument and the
function declaration for migrate_pages().

Signed-off-by: Joonsoo Kim 
Cc: Christoph Lameter 
Cc: Mel Gorman 
Acked-by: David Rientjes 
Cc: "Aneesh Kumar K.V" 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

x86/mce: Fix siginfo_t->si_addr value for non-recoverable memory faults

2012-07-11T17:20:47+00:00

In commit dad1743e5993f1 ("x86/mce: Only restart instruction after machine
check recovery if it is safe") we fixed mce_notify_process() to force a
signal to the current process if it was not restartable (RIPV bit not
set in MCG_STATUS). But doing it here means that the process doesn't
get told the virtual address of the fault via siginfo_t->si_addr. This
would prevent application level recovery from the fault.

Make a new MF_MUST_KILL flag bit for memory_failure() et al. to use so
that we will provide the right information with the signal.

Signed-off-by: Tony Luck 
Acked-by: Borislav Petkov 
Cc: stable@kernel.org    # 3.4+

mm/memory_failure: let the compiler add the function name

2012-05-29T23:22:18+00:00

These things tend to get out of sync with time so let the compiler
automatically enter the current function name using __func__.

No functional change.

Signed-off-by: Borislav Petkov 
Acked-by: Andi Kleen 
Cc: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: page_isolation: MIGRATE_CMA isolation functions added

2012-05-21T13:09:33+00:00

This commit changes various functions that change pages and
pageblocks migrate type between MIGRATE_ISOLATE and
MIGRATE_MOVABLE in such a way as to allow to work with
MIGRATE_CMA migrate type.

Signed-off-by: Michal Nazarewicz 
Signed-off-by: Marek Szyprowski 
Reviewed-by: KAMEZAWA Hiroyuki 
Tested-by: Rob Clark 
Tested-by: Ohad Ben-Cohen 
Tested-by: Benjamin Gaignard 
Tested-by: Robert Nelson 
Tested-by: Barry Song

Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-03-22T16:42:04+00:00

Pull MCE changes from Ingo Molnar.

* 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Fix return value of mce_chrdev_read() when erst is disabled
  x86/mce: Convert static array of pointers to per-cpu variables
  x86/mce: Replace hard coded hex constants with symbolic defines
  x86/mce: Recognise machine check bank signature for data path error
  x86/mce: Handle "action required" errors
  x86/mce: Add mechanism to safely save information in MCE handler
  x86/mce: Create helper function to save addr/misc when needed
  HWPOISON: Add code to handle "action required" errors.
  HWPOISON: Clean up memory_failure() vs. __memory_failure()