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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-16 05:05:50 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-16 20:11:15 +0200 |
| commit | fc3a5ac52827960ca1e17ba243ff4ba29fcc057a (patch) | |
| tree | d0526db86c2e7d611d1695f2b8bbf3da5225c92c | |
| parent | mm/rmap: fix assumptions of THP size (diff) | |
| download | linux-fc3a5ac52827960ca1e17ba243ff4ba29fcc057a.tar.xz linux-fc3a5ac52827960ca1e17ba243ff4ba29fcc057a.zip | |
mm/truncate: fix truncation for pages of arbitrary size
Remove the assumption that a compound page is HPAGE_PMD_SIZE, and the
assumption that any page is PAGE_SIZE.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SeongJae Park <sjpark@amazon.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Link: https://lkml.kernel.org/r/20200908195539.25896-10-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/truncate.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index 6bbe0f0b3ce9..18cec39a9f53 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -168,7 +168,7 @@ void do_invalidatepage(struct page *page, unsigned int offset, * becomes orphaned. It will be left on the LRU and may even be mapped into * user pagetables if we're racing with filemap_fault(). * - * We need to bale out if page->mapping is no longer equal to the original + * We need to bail out if page->mapping is no longer equal to the original * mapping. This happens a) when the VM reclaimed the page while we waited on * its lock, b) when a concurrent invalidate_mapping_pages got there first and * c) when tmpfs swizzles a page between a tmpfs inode and swapper_space. @@ -177,12 +177,12 @@ static void truncate_cleanup_page(struct address_space *mapping, struct page *page) { if (page_mapped(page)) { - pgoff_t nr = PageTransHuge(page) ? HPAGE_PMD_NR : 1; + unsigned int nr = thp_nr_pages(page); unmap_mapping_pages(mapping, page->index, nr, false); } if (page_has_private(page)) - do_invalidatepage(page, 0, PAGE_SIZE); + do_invalidatepage(page, 0, thp_size(page)); /* * Some filesystems seem to re-dirty the page even after |