mirror of
https://github.com/simtactics/niotso.git
synced 2025-03-22 02:52:18 +00:00
22 lines
1 KiB
C
22 lines
1 KiB
C
/* 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
|