diff options
| -rw-r--r-- | UPDATING | 8 | ||||
| -rw-r--r-- | lib/libc/sys/shmctl.2 | 9 |
2 files changed, 9 insertions, 8 deletions
@@ -23,11 +23,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 8.x IS SLOW: ln -s aj /etc/malloc.conf.) 20090302: - The workaround is committed to allow to create System V shared - memory segment of size > 2 Gb on the 64-bit architectures. - Due to limitation of the existing ABI, the shm_segsz member + A workaround is committed to allow the creation of System V shared + memory segment of size > 2 GB on the 64-bit architectures. + Due to a limitation of the existing ABI, the shm_segsz member of the struct shmid_ds, returned by shmctl(IPC_STAT) call is - wrong for large segments. Note that limits shall be explicitely + wrong for large segments. Note that limits must be explicitely raised to allow such segments to be created. 20090301: diff --git a/lib/libc/sys/shmctl.2 b/lib/libc/sys/shmctl.2 index 3e19666..2ac7d05 100644 --- a/lib/libc/sys/shmctl.2 +++ b/lib/libc/sys/shmctl.2 @@ -134,12 +134,13 @@ Permission denied due to mismatch between operation and mode of shared memory segment. .El .Sh "BUGS" +The segment size has size_t type. The shm_segsz member of the .Vt shmid_ds -structure has int type, that is too short to represent full range -of the values for segment size, which is allowed to be size_t. -If shared memory limits are raised to allow segments with size > 2 Gb -to be created, be aware that IPC_STAT call may return truncated value +structure has type int, which is too short to represent the full range +of values for a segment size. +If shared memory limits are raised to allow segments with size > 2 GB +to be created, be aware that IPC_STAT call may return a truncated value for shm_segsz. .El .Sh "SEE ALSO" |
