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| author |   Matthew Wilcox <willy@infradead.org> | 2017-12-04 15:06:23 -0500 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-10-21 10:46:38 -0400 |
| commit | 85b392dbace77bf91050e6e07f3dd0f262e4babf (patch) | |
| tree | 3bd63328b8e6d495febe03dd73018fc156e8f0a0 | |
| parent | mm: Convert collapse_shmem to XArray (diff) | |
| download | linux-dev-85b392dbace77bf91050e6e07f3dd0f262e4babf.tar.xz linux-dev-85b392dbace77bf91050e6e07f3dd0f262e4babf.zip | |
mm: Convert khugepaged_scan_shmem to XArray
Slightly shorter and easier to read code.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
| -rw-r--r-- | mm/khugepaged.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 9610e8cba545..c13625c1ad5e 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1542,8 +1542,7 @@ static void khugepaged_scan_shmem(struct mm_struct *mm, pgoff_t start, struct page **hpage) { struct page *page = NULL; - struct radix_tree_iter iter; - void **slot; + XA_STATE(xas, &mapping->i_pages, start); int present, swap; int node = NUMA_NO_NODE; int result = SCAN_SUCCEED; @@ -1552,17 +1551,11 @@ static void khugepaged_scan_shmem(struct mm_struct *mm, swap = 0; memset(khugepaged_node_load, 0, sizeof(khugepaged_node_load)); rcu_read_lock(); - radix_tree_for_each_slot(slot, &mapping->i_pages, &iter, start) { - if (iter.index >= start + HPAGE_PMD_NR) - break; - - page = radix_tree_deref_slot(slot); - if (radix_tree_deref_retry(page)) { - slot = radix_tree_iter_retry(&iter); + xas_for_each(&xas, page, start + HPAGE_PMD_NR - 1) { + if (xas_retry(&xas, page)) continue; - } - if (radix_tree_exception(page)) { + if (xa_is_value(page)) { if (++swap > khugepaged_max_ptes_swap) { result = SCAN_EXCEED_SWAP_PTE; break; @@ -1601,7 +1594,7 @@ static void khugepaged_scan_shmem(struct mm_struct *mm, present++; if (need_resched()) { - slot = radix_tree_iter_resume(slot, &iter); + xas_pause(&xas); cond_resched_rcu(); } } |