mm/migrate: rename migration reason MR_CMA to MR_CONTIG_RANGE

alloc_contig_range() initiates compaction and eventual migration for the
purpose of either CMA or HugeTLB allocations.  At present, the reason
code remains the same MR_CMA for either of these cases.  Let's make it
MR_CONTIG_RANGE which will appropriately reflect the reason code in both
these cases.

Link: http://lkml.kernel.org/r/20180202091518.18798-1-khandual@linux.vnet.ibm.com
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c
index e0a2d8e..9a8a084 100644 (file)
--- a/arch/powerpc/mm/mmu_context_iommu.c
+++ b/arch/powerpc/mm/mmu_context_iommu.c
@@ -112,7 +112,7 @@ static int mm_iommu_move_page_from_cma(struct page *page)
        put_page(page); /* Drop the gup reference */
 
        ret = migrate_pages(&cma_migrate_pages, new_iommu_non_cma_page,
-                               NULL, 0, MIGRATE_SYNC, MR_CMA);
+                               NULL, 0, MIGRATE_SYNC, MR_CONTIG_RANGE);
        if (ret) {
                if (!list_empty(&cma_migrate_pages))
                        putback_movable_pages(&cma_migrate_pages);

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index a2246cf..ab45f8a 100644 (file)
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -25,7 +25,7 @@ enum migrate_reason {
        MR_SYSCALL,             /* also applies to cpusets */
        MR_MEMPOLICY_MBIND,
        MR_NUMA_MISPLACED,
-       MR_CMA,
+       MR_CONTIG_RANGE,
        MR_TYPES
 };
 

diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h
index bcf4dac..7113728 100644 (file)
--- a/include/trace/events/migrate.h
+++ b/include/trace/events/migrate.h
@@ -20,7 +20,7 @@
        EM( MR_SYSCALL,         "syscall_or_cpuset")            \
        EM( MR_MEMPOLICY_MBIND, "mempolicy_mbind")              \
        EM( MR_NUMA_MISPLACED,  "numa_misplaced")               \
-       EMe(MR_CMA,             "cma")
+       EMe(MR_CONTIG_RANGE,    "contig_range")
 
 /*
  * First define the enums in the above macros to be exported to userspace

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ea0182..531d6ac 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7591,7 +7591,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
                cc->nr_migratepages -= nr_reclaimed;
 
                ret = migrate_pages(&cc->migratepages, alloc_migrate_target,
-                                   NULL, 0, cc->mode, MR_CMA);
+                                   NULL, 0, cc->mode, MR_CONTIG_RANGE);
        }
        if (ret < 0) {
                putback_movable_pages(&cc->migratepages);