diff options
Diffstat (limited to 'src/backend/utils/mmgr/dsa.c')
| -rw-r--r-- | src/backend/utils/mmgr/dsa.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/backend/utils/mmgr/dsa.c b/src/backend/utils/mmgr/dsa.c index b6cb8fa13dc..82376fde2d9 100644 --- a/src/backend/utils/mmgr/dsa.c +++ b/src/backend/utils/mmgr/dsa.c @@ -51,6 +51,7 @@ #include "postgres.h" #include "port/atomics.h" +#include "port/pg_bitutils.h" #include "storage/dsm.h" #include "storage/ipc.h" #include "storage/lwlock.h" @@ -137,7 +138,18 @@ typedef size_t dsa_segment_index; * free pages? There is no point in looking in segments in lower bins; they * definitely can't service a request for n free pages. */ -#define contiguous_pages_to_segment_bin(n) Min(fls(n), DSA_NUM_SEGMENT_BINS - 1) +static inline size_t +contiguous_pages_to_segment_bin(size_t n) +{ + size_t bin; + + if (n == 0) + bin = 0; + else + bin = pg_leftmost_one_pos_size_t(n) + 1; + + return Min(bin, DSA_NUM_SEGMENT_BINS - 1); +} /* Macros for access to locks. */ #define DSA_AREA_LOCK(area) (&area->control->lock) |