components/database/postgresql-15/patches/01-dism.patch

   1 On Solaris/illumos we want to use DISM or ISM e.g. Dynamic Intimate Shared Memory or Intimate Shared Memory
   2 which is available via sysv SHM only. This patch changes the default shared memory system to be sysv
   3 on Solaris/illumos based systems e.g. which have SHM_SHARE_MMU (which translates to ISM) and when SHM_PAGEABLE
   4 is defined in sys/shm.h we set the default PG_SHMAT_FLAGS to SHM_PAGEABLE which will lead to DISM being
   5 used. The patch to the postgresql.conf.sample is to show that sysv is the default for Solaris and the
   6 ordering is changed as by default it used to be mmap and posix for the defaults and you could always
   7 override things using the sysv setting.
   8 --
   9
  10 --- postgresql-15.3/src/backend/utils/misc/postgresql.conf.sample.orig  2023-05-08 23:13:20.000000000 +0200
  11 +++ postgresql-15.3/src/backend/utils/misc/postgresql.conf.sample       2023-07-16 12:44:11.986096269 +0200
  12 @@ -141,16 +141,16 @@
  13  #autovacuum_work_mem = -1              # min 1MB, or -1 to use maintenance_work_mem
  14  #logical_decoding_work_mem = 64MB      # min 64kB
  15  #max_stack_depth = 2MB                 # min 100kB
  16 -#shared_memory_type = mmap             # the default is the first option
  17 +#shared_memory_type = sysv             # the default is the first option
  18                                         # supported by the operating system:
  19 -                                       #   mmap
  20                                         #   sysv
  21 +                                       #   mmap
  22                                         #   windows
  23                                         # (change requires restart)
  24 -#dynamic_shared_memory_type = posix    # the default is usually the first option
  25 +#dynamic_shared_memory_type = sysv     # the default is usually the first option
  26                                         # supported by the operating system:
  27 -                                       #   posix
  28                                         #   sysv
  29 +                                       #   posix
  30                                         #   windows
  31                                         #   mmap
  32                                         # (change requires restart)
  33 --- postgresql-15.3/src/include/portability/mem.h.orig  2023-05-08 23:13:20.000000000 +0200
  34 +++ postgresql-15.3/src/include/portability/mem.h       2023-07-16 12:45:44.948071518 +0200
  35 @@ -14,11 +14,15 @@
  36
  37  #define IPCProtection  (0600)  /* access/modify by user only */
  38
  39 +#ifdef SHM_PAGEABLE                    /* use dynamic intimate shared memory on Solaris */
  40 +#define PG_SHMAT_FLAGS                 SHM_PAGEABLE
  41 +#else
  42  #ifdef SHM_SHARE_MMU                   /* use intimate shared memory on Solaris */
  43  #define PG_SHMAT_FLAGS                 SHM_SHARE_MMU
  44  #else
  45  #define PG_SHMAT_FLAGS                 0
  46  #endif
  47 +#endif
  48
  49  /* Linux prefers MAP_ANONYMOUS, but the flag is called MAP_ANON on other systems. */
  50  #ifndef MAP_ANONYMOUS
  51 --- postgresql-15.3/src/include/storage/dsm_impl.h.orig 2023-05-08 23:13:20.000000000 +0200
  52 +++ postgresql-15.3/src/include/storage/dsm_impl.h      2023-07-16 12:49:00.361608200 +0200
  53 @@ -19,6 +19,13 @@
  54  #define DSM_IMPL_WINDOWS               3
  55  #define DSM_IMPL_MMAP                  4
  56
  57 +#ifdef HAVE_SYS_SHM_H
  58 + /*
  59 + * For SHM_SHARE_MMU.
  60 + */
  61 +#include <sys/shm.h>
  62 +#endif
  63 +
  64  /*
  65   * Determine which dynamic shared memory implementations will be supported
  66   * on this platform, and which one will be the default.
  67 @@ -34,6 +41,11 @@
  68  #define USE_DSM_SYSV
  69  #ifndef DEFAULT_DYNAMIC_SHARED_MEMORY_TYPE
  70  #define DEFAULT_DYNAMIC_SHARED_MEMORY_TYPE             DSM_IMPL_SYSV
  71 +#else
  72 +#ifdef SHM_SHARE_MMU
  73 +#undef DEFAULT_DYNAMIC_SHARED_MEMORY_TYPE
  74 +#define DEFAULT_DYNAMIC_SHARED_MEMORY_TYPE      DSM_IMPL_SYSV
  75 +#endif
  76  #endif
  77  #define USE_DSM_MMAP
  78  #endif
  79 --- postgresql-15.3/src/include/storage/pg_shmem.h.orig 2023-05-08 23:13:20.000000000 +0200
  80 +++ postgresql-15.3/src/include/storage/pg_shmem.h      2023-07-16 12:51:14.638216259 +0200
  81 @@ -70,7 +70,9 @@
  82  #endif
  83  extern PGDLLIMPORT void *UsedShmemSegAddr;
  84
  85 -#if !defined(WIN32) && !defined(EXEC_BACKEND)
  86 +#if defined(SHM_SHARE_MMU)
  87 +#define DEFAULT_SHARED_MEMORY_TYPE SHMEM_TYPE_SYSV
  88 +#elif !defined(WIN32) && !defined(EXEC_BACKEND)
  89  #define DEFAULT_SHARED_MEMORY_TYPE SHMEM_TYPE_MMAP
  90  #elif !defined(WIN32)
  91  #define DEFAULT_SHARED_MEMORY_TYPE SHMEM_TYPE_SYSV