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authorMatthew Wilcox <mawilcox@microsoft.com>2016-12-14 15:08:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-14 16:04:10 -0800
commit268f42de718128cd0301293177e79c08c38e39a6 (patch)
tree6668c85388c327f64ce9b51e77d70e245ec52b57 /tools/testing/radix-tree/test.h
parentradix-tree: delete radix_tree_locate_item() (diff)
downloadlinux-dev-268f42de718128cd0301293177e79c08c38e39a6.tar.xz
linux-dev-268f42de718128cd0301293177e79c08c38e39a6.zip
radix-tree: delete radix_tree_range_tag_if_tagged()
This is an exceptionally complicated function with just one caller (tag_pages_for_writeback). We devote a large portion of the runtime of the test suite to testing this one function which has one caller. By introducing the new function radix_tree_iter_tag_set(), we can eliminate all of the complexity while keeping the performance. The caller can now use a fairly standard radix_tree_for_each() loop, and it doesn't need to worry about tricksy things like 'start' wrapping. The test suite continues to spend a large amount of time investigating this function, but now it's testing the underlying primitives such as radix_tree_iter_resume() and the radix_tree_for_each_tagged() iterator which are also used by other parts of the kernel. Link: http://lkml.kernel.org/r/1480369871-5271-57-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <willy@infradead.org> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--tools/testing/radix-tree/test.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/test.h b/tools/testing/radix-tree/test.h
index 3d9d1d30da22..e11e4d260b4e 100644
--- a/tools/testing/radix-tree/test.h
+++ b/tools/testing/radix-tree/test.h
@@ -25,6 +25,9 @@ void item_full_scan(struct radix_tree_root *root, unsigned long start,
unsigned long nr, int chunk);
void item_kill_tree(struct radix_tree_root *root);
+int tag_tagged_items(struct radix_tree_root *, pthread_mutex_t *,
+ unsigned long start, unsigned long end, unsigned batch,
+ unsigned iftag, unsigned thentag);
unsigned long find_item(struct radix_tree_root *, void *item);
void tag_check(void);