diff options
| author | Matthew Wilcox | 2016-12-15 00:09:04 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2016-12-15 01:04:10 +0100 |
| commit | 2791653a6814d170fa893344618563a7b1da95c6 (patch) | |
| tree | 635c8ca43b49ac15836e5d4b5786d64733661755 /tools/testing/radix-tree/test.h | |
| parent | radix-tree: add radix_tree_split (diff) | |
| download | kernel-qcow2-linux-2791653a6814d170fa893344618563a7b1da95c6.tar.gz kernel-qcow2-linux-2791653a6814d170fa893344618563a7b1da95c6.tar.xz kernel-qcow2-linux-2791653a6814d170fa893344618563a7b1da95c6.zip | |
radix-tree: add radix_tree_split_preload()
Calculate how many nodes we need to allocate to split an old_order entry
into multiple entries, each of size new_order. The test suite checks
that we allocated exactly the right number of nodes; neither too many
(checked by rtp->nr == 0), nor too few (checked by comparing
nr_allocated before and after the call to radix_tree_split()).
Link: http://lkml.kernel.org/r/1480369871-5271-60-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
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 'tools/testing/radix-tree/test.h')
| -rw-r--r-- | tools/testing/radix-tree/test.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/test.h b/tools/testing/radix-tree/test.h index e11e4d260b4e..7c2611caa6d2 100644 --- a/tools/testing/radix-tree/test.h +++ b/tools/testing/radix-tree/test.h @@ -52,3 +52,8 @@ int root_tag_get(struct radix_tree_root *root, unsigned int tag); unsigned long node_maxindex(struct radix_tree_node *); unsigned long shift_maxindex(unsigned int shift); int radix_tree_cpu_dead(unsigned int cpu); +struct radix_tree_preload { + unsigned nr; + struct radix_tree_node *nodes; +}; +extern struct radix_tree_preload radix_tree_preloads; |