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| author | Dennis Zhou (Facebook) <dennisszhou@gmail.com> | 2017-07-24 19:02:03 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-07-26 10:23:52 -0400 |
| commit | 6b9d7c8e8ecf35dc9ba6763a45d81e54ee3ffcde (patch) | |
| tree | 840107bd729b045342ff0296aefa8e017aae173c /mm/percpu-stats.c | |
| parent | 10edf5b0b6e238f9102c88df8b92ba7ce8fdcc46 (diff) | |
| download | linux-6b9d7c8e8ecf35dc9ba6763a45d81e54ee3ffcde.tar.bz2 | |
percpu: end chunk area maps page aligned for the populated bitmap
The area map allocator manages the first chunk area by hiding all but
the region it is responsible for serving in the area map. To align this
with the populated page bitmap, end_offset is introduced to keep track
of the delta to end page aligned. The area map is appended with the
page aligned end when necessary to be in line with how the bitmap
allocator requires the ending to be aligned with the LCM of PAGE_SIZE
and the size of each bitmap block. percpu_stats is updated to ignore
this region when present.
Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu-stats.c')
| -rw-r--r-- | mm/percpu-stats.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/percpu-stats.c b/mm/percpu-stats.c index 32f3550ea099..ffbdb96cdbeb 100644 --- a/mm/percpu-stats.c +++ b/mm/percpu-stats.c @@ -51,7 +51,7 @@ static int find_max_map_used(void) static void chunk_map_stats(struct seq_file *m, struct pcpu_chunk *chunk, int *buffer) { - int i, s_index, last_alloc, alloc_sign, as_len; + int i, s_index, e_index, last_alloc, alloc_sign, as_len; int *alloc_sizes, *p; /* statistics */ int sum_frag = 0, max_frag = 0; @@ -59,10 +59,11 @@ static void chunk_map_stats(struct seq_file *m, struct pcpu_chunk *chunk, alloc_sizes = buffer; s_index = (chunk->start_offset) ? 1 : 0; + e_index = chunk->map_used - ((chunk->end_offset) ? 1 : 0); /* find last allocation */ last_alloc = -1; - for (i = chunk->map_used - 1; i >= s_index; i--) { + for (i = e_index - 1; i >= s_index; i--) { if (chunk->map[i] & 1) { last_alloc = i; break; |