The patch titled
Subject: mm: disable numa migration faults for dax vmas
has been added to the -mm tree. Its filename is
mm-disable-numa-migration-faults-for-dax-vmas.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-disable-numa-migration-faults-for-dax-vmas.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-disable-numa-migration-faults-for-dax-vmas.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: mm: disable numa migration faults for dax vmas
Mark dax vmas as not migratable to exclude them from task_numa_work().
This is especially relevant for device-dax which wants to ensure
predictable access latency and not incur periodic faults.
Link: http://lkml.kernel.org/r/147892450132.22062.16875659431109209179.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reported-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mempolicy.h | 4 ++++
1 file changed, 4 insertions(+)
diff -puN include/linux/mempolicy.h~mm-disable-numa-migration-faults-for-dax-vmas include/linux/mempolicy.h
--- a/include/linux/mempolicy.h~mm-disable-numa-migration-faults-for-dax-vmas
+++ a/include/linux/mempolicy.h
@@ -7,6 +7,7 @@
#include <linux/mmzone.h>
+#include <linux/dax.h>
#include <linux/slab.h>
#include <linux/rbtree.h>
#include <linux/spinlock.h>
@@ -179,6 +180,9 @@ static inline bool vma_migratable(struct
if (vma->vm_flags & (VM_IO | VM_PFNMAP))
return false;
+ if (vma_is_dax(vma))
+ return false;
+
#ifndef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
if (vma->vm_flags & VM_HUGETLB)
return false;
_
Patches currently in -mm which might be from dan.j.williams@xxxxxxxxx are
mm-disable-numa-migration-faults-for-dax-vmas.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
