diff options
Diffstat (limited to 'drivers/md/bcache/sysfs.c')
-rw-r--r-- | drivers/md/bcache/sysfs.c | 43 |
1 files changed, 22 insertions, 21 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 4d9cca4..29228b8 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -665,12 +665,10 @@ SHOW(__bch_cache) int cmp(const void *l, const void *r) { return *((uint16_t *) r) - *((uint16_t *) l); } - /* Number of quantiles we compute */ - const unsigned nq = 31; - size_t n = ca->sb.nbuckets, i, unused, btree; uint64_t sum = 0; - uint16_t q[nq], *p, *cached; + /* Compute 31 quantiles */ + uint16_t q[31], *p, *cached; ssize_t ret; cached = p = vmalloc(ca->sb.nbuckets * sizeof(uint16_t)); @@ -703,26 +701,29 @@ SHOW(__bch_cache) if (n) do_div(sum, n); - for (i = 0; i < nq; i++) - q[i] = INITIAL_PRIO - cached[n * (i + 1) / (nq + 1)]; + for (i = 0; i < ARRAY_SIZE(q); i++) + q[i] = INITIAL_PRIO - cached[n * (i + 1) / + (ARRAY_SIZE(q) + 1)]; vfree(p); - ret = snprintf(buf, PAGE_SIZE, - "Unused: %zu%%\n" - "Metadata: %zu%%\n" - "Average: %llu\n" - "Sectors per Q: %zu\n" - "Quantiles: [", - unused * 100 / (size_t) ca->sb.nbuckets, - btree * 100 / (size_t) ca->sb.nbuckets, sum, - n * ca->sb.bucket_size / (nq + 1)); - - for (i = 0; i < nq && ret < (ssize_t) PAGE_SIZE; i++) - ret += snprintf(buf + ret, PAGE_SIZE - ret, - i < nq - 1 ? "%u " : "%u]\n", q[i]); - - buf[PAGE_SIZE - 1] = '\0'; + ret = scnprintf(buf, PAGE_SIZE, + "Unused: %zu%%\n" + "Metadata: %zu%%\n" + "Average: %llu\n" + "Sectors per Q: %zu\n" + "Quantiles: [", + unused * 100 / (size_t) ca->sb.nbuckets, + btree * 100 / (size_t) ca->sb.nbuckets, sum, + n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); + + for (i = 0; i < ARRAY_SIZE(q); i++) + ret += scnprintf(buf + ret, PAGE_SIZE - ret, + "%u ", q[i]); + ret--; + + ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); + return ret; } |