The patch titled
Subject: truncate: handle file thp
has been added to the -mm tree. Its filename is
truncate-handle-file-thp.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/truncate-handle-file-thp.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/truncate-handle-file-thp.patch
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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: truncate: handle file thp
For shmem/tmpfs we only need to tweak truncate_inode_page() and
invalidate_mapping_pages().
truncate_inode_pages_range() and invalidate_inode_pages2_range() are
adjusted to use page_to_pgoff().
Link: http://lkml.kernel.org/r/1466021202-61880-26-git-send-email-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/truncate.c | 28 +++++++++++++++++++++++-----
1 file changed, 23 insertions(+), 5 deletions(-)
diff -puN mm/truncate.c~truncate-handle-file-thp mm/truncate.c
--- a/mm/truncate.c~truncate-handle-file-thp
+++ a/mm/truncate.c
@@ -155,10 +155,14 @@ invalidate_complete_page(struct address_
int truncate_inode_page(struct address_space *mapping, struct page *page)
{
+ loff_t holelen;
+ VM_BUG_ON_PAGE(PageTail(page), page);
+
+ holelen = PageTransHuge(page) ? HPAGE_PMD_SIZE : PAGE_SIZE;
if (page_mapped(page)) {
unmap_mapping_range(mapping,
(loff_t)page->index << PAGE_SHIFT,
- PAGE_SIZE, 0);
+ holelen, 0);
}
return truncate_complete_page(mapping, page);
}
@@ -279,7 +283,7 @@ void truncate_inode_pages_range(struct a
if (!trylock_page(page))
continue;
- WARN_ON(page->index != index);
+ WARN_ON(page_to_pgoff(page) != index);
if (PageWriteback(page)) {
unlock_page(page);
continue;
@@ -367,7 +371,7 @@ void truncate_inode_pages_range(struct a
}
lock_page(page);
- WARN_ON(page->index != index);
+ WARN_ON(page_to_pgoff(page) != index);
wait_on_page_writeback(page);
truncate_inode_page(mapping, page);
unlock_page(page);
@@ -487,7 +491,21 @@ unsigned long invalidate_mapping_pages(s
if (!trylock_page(page))
continue;
- WARN_ON(page->index != index);
+
+ WARN_ON(page_to_pgoff(page) != index);
+
+ /* Middle of THP: skip */
+ if (PageTransTail(page)) {
+ unlock_page(page);
+ continue;
+ } else if (PageTransHuge(page)) {
+ index += HPAGE_PMD_NR - 1;
+ i += HPAGE_PMD_NR - 1;
+ /* 'end' is in the middle of THP */
+ if (index == round_down(end, HPAGE_PMD_NR))
+ continue;
+ }
+
ret = invalidate_inode_page(page);
unlock_page(page);
/*
@@ -594,7 +612,7 @@ int invalidate_inode_pages2_range(struct
}
lock_page(page);
- WARN_ON(page->index != index);
+ WARN_ON(page_to_pgoff(page) != index);
if (page->mapping != mapping) {
unlock_page(page);
continue;
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
revert-mm-make-faultaround-produce-old-ptes.patch
revert-mm-disable-fault-around-on-emulated-access-bit-architecture.patch
mm-make-swapin-readahead-to-improve-thp-collapse-rate-fix.patch
mm-make-swapin-readahead-to-improve-thp-collapse-rate-fix-2.patch
mm-make-swapin-readahead-to-improve-thp-collapse-rate-fix-3.patch
mm-thp-make-swapin-readahead-under-down_read-of-mmap_sem-fix.patch
khugepaged-recheck-pmd-after-mmap_sem-re-acquired.patch
thp-mlock-update-unevictable-lrutxt.patch
mm-do-not-pass-mm_struct-into-handle_mm_fault.patch
mm-introduce-fault_env.patch
mm-postpone-page-table-allocation-until-we-have-page-to-map.patch
rmap-support-file-thp.patch
mm-introduce-do_set_pmd.patch
thp-vmstats-add-counters-for-huge-file-pages.patch
thp-support-file-pages-in-zap_huge_pmd.patch
thp-handle-file-pages-in-split_huge_pmd.patch
thp-handle-file-cow-faults.patch
thp-skip-file-huge-pmd-on-copy_huge_pmd.patch
thp-prepare-change_huge_pmd-for-file-thp.patch
thp-run-vma_adjust_trans_huge-outside-i_mmap_rwsem.patch
thp-file-pages-support-for-split_huge_page.patch
thp-mlock-do-not-mlock-pte-mapped-file-huge-pages.patch
vmscan-split-file-huge-pages-before-paging-them-out.patch
page-flags-relax-policy-for-pg_mappedtodisk-and-pg_reclaim.patch
radix-tree-implement-radix_tree_maybe_preload_order.patch
filemap-prepare-find-and-delete-operations-for-huge-pages.patch
truncate-handle-file-thp.patch
mm-rmap-account-shmem-thp-pages.patch
shmem-prepare-huge=-mount-option-and-sysfs-knob.patch
shmem-add-huge-pages-support.patch
shmem-thp-respect-madv_nohugepage-for-file-mappings.patch
thp-extract-khugepaged-from-mm-huge_memoryc.patch
khugepaged-move-up_readmmap_sem-out-of-khugepaged_alloc_page.patch
shmem-make-shmem_inode_info-lock-irq-safe.patch
khugepaged-add-support-of-collapse-for-tmpfs-shmem-pages.patch
thp-introduce-config_transparent_huge_pagecache.patch
shmem-split-huge-pages-beyond-i_size-under-memory-pressure.patch
thp-update-documentation-vm-transhugefilesystems-proctxt.patch
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