Fix some rounding code for shared memory. InitializeShmemGUCs() always added 1 to the value calculated for shared_memory_size_in_huge_pages, which is unnecessary if the shared memory size is divisible by the huge page size.
CreateAnonymousSegment() neglected to check for overflow when rounding up to a multiple of the huge page size. These are arguably bugs, but they seem extremely unlikely to be causing problems in practice, so no back-patch. Author: Anthonin Bonnefoy <[email protected]> Reviewed-by: Ashutosh Bapat <[email protected]> Reviewed-by: Michael Paquier <[email protected]> Discussion: https://postgr.es/m/CAO6_Xqq2vZbva0R9eQSY0p2kfksX2aP4r%3D%2BZ_q1HBYNU%3Dm8bBg%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/8eef2df1898cc34dfaa69ff200f5112d7eeb7c67 Modified Files -------------- src/backend/port/sysv_shmem.c | 2 +- src/backend/storage/ipc/ipci.c | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-)
