The patch titled
Align faulting address to a hugepage boundary before unmapping
has been removed from the -mm tree. Its filename was
hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed-align-faulting-address-to-a-hugepage-boundary-before-unmapping.patch
This patch was dropped because it was folded into hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed.patch
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: Align faulting address to a hugepage boundary before unmapping
From: Mel Gorman <mel@xxxxxxxxx>
When taking a fault for COW on a private mapping it is possible that the
parent will have to steal the original page from its children due to an
insufficient hugepage pool. In this case, unmap_ref_private() is called
for the faulting address to unmap via unmap_hugepage_range(). This patch
ensures that the address used for unmapping is hugepage-aligned.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Acked-by: Adam Litke <agl@xxxxxxxxxx>
Cc: Andy Whitcroft <apw@xxxxxxxxxxxx>
Cc: William Lee Irwin III <wli@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/hugetlb.c~hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed-align-faulting-address-to-a-hugepage-boundary-before-unmapping mm/hugetlb.c
--- a/mm/hugetlb.c~hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed-align-faulting-address-to-a-hugepage-boundary-before-unmapping
+++ a/mm/hugetlb.c
@@ -1042,6 +1042,7 @@ int unmap_ref_private(struct mm_struct *
* vm_pgoff is in PAGE_SIZE units, hence the different calculation
* from page cache lookup which is in HPAGE_SIZE units.
*/
+ address = address & huge_page_mask(hstate_vma(vma));
pgoff = ((address - vma->vm_start) >> PAGE_SHIFT)
+ (vma->vm_pgoff >> PAGE_SHIFT);
mapping = (struct address_space *)page_private(page);
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
origin.patch
mm-add-a-basic-debugging-framework-for-memory-initialisation.patch
mm-verify-the-page-links-and-memory-model.patch
mm-make-defensive-checks-around-pfn-values-registered-for-memory-usage.patch
mm-print-out-the-zonelists-on-request-for-manual-verification.patch
mm-move-bootmem-descriptors-definition-to-a-single-place.patch
mm-fix-free_all_bootmem_core-alignment-check.patch
mm-normalize-internal-argument-passing-of-bootmem-data.patch
mm-unexport-__alloc_bootmem_core.patch
page-allocator-inlnie-some-__alloc_pages-wrappers.patch
hugetlb-move-hugetlb_acct_memory.patch
hugetlb-reserve-huge-pages-for-reliable-map_private-hugetlbfs-mappings-until-fork.patch
hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed.patch
hugetlb-guarantee-that-cow-faults-for-a-process-that-called-mmapmap_private-on-hugetlbfs-will-succeed-align-faulting-address-to-a-hugepage-boundary-before-unmapping.patch
huge-page-private-reservation-review-cleanups.patch
huge-page-private-reservation-review-cleanups-fix.patch
mm-record-map_noreserve-status-on-vmas-and-fix-small-page-mprotect-reservations.patch
hugetlb-move-reservation-region-support-earlier.patch
hugetlb-allow-huge-page-mappings-to-be-created-without-reservations.patch
hugetlb-allow-huge-page-mappings-to-be-created-without-reservations-cleanups.patch
hugetlb-reservations-fix-hugetlb-map_private-reservations-across-vma-splits-v2.patch
mm-remove-mm_init-compilation-dependency-on-config_debug_memory_init.patch
mm-create-sys-kernel-mm.patch
mm-create-sys-kernel-mm-fix.patch
hugetlb-new-sysfs-interface-hugetlb-hang-off-of-sys-kernel-mm-rather-than-sys-kernel.patch
hugetlb-new-sysfs-interface-hugetlb-remove-config_sysfs-dependency.patch
hugetlb-fix-race-when-reading-proc-meminfo.patch
hugetlb-fix-a-hugepage-reservation-check-for-map_shared.patch
hugetlb-quota-is-not-freed-for-unused-reserved-private-huge-pages.patch
mm-add-alloc_pages_exact-and-free_pages_exact.patch
memory-hotplugallocate-usemap-on-the-section-with-pgdat-take-4.patch
memory-hotplug-add-sysfs-removable-attribute-for-hotplug-memory-remove.patch
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