| /* src/include/port/linux.h */ |
| |
| /* |
| * As of July 2007, all known versions of the Linux kernel will sometimes |
| * return EIDRM for a shmctl() operation when EINVAL is correct (it happens |
| * when the low-order 15 bits of the supplied shm ID match the slot number |
| * assigned to a newer shmem segment). We deal with this by assuming that |
| * EIDRM means EINVAL in PGSharedMemoryIsInUse(). This is reasonably safe |
| * since in fact Linux has no excuse for ever returning EIDRM; it doesn't |
| * track removed segments in a way that would allow distinguishing them from |
| * private ones. But someday that code might get upgraded, and we'd have |
| * to have a kernel version test here. |
| */ |
| #define HAVE_LINUX_EIDRM_BUG |
| |
| /* |
| * Set the default wal_sync_method to fdatasync. With recent Linux versions, |
| * xlogdefs.h's normal rules will prefer open_datasync, which (a) doesn't |
| * perform better and (b) causes outright failures on ext4 data=journal |
| * filesystems, because those don't support O_DIRECT. |
| */ |
| #define PLATFORM_DEFAULT_SYNC_METHOD SYNC_METHOD_FDATASYNC |
