Header And Logo
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00001 /* src/include/port/linux.h */ 00002 00003 /* 00004 * As of July 2007, all known versions of the Linux kernel will sometimes 00005 * return EIDRM for a shmctl() operation when EINVAL is correct (it happens 00006 * when the low-order 15 bits of the supplied shm ID match the slot number 00007 * assigned to a newer shmem segment). We deal with this by assuming that 00008 * EIDRM means EINVAL in PGSharedMemoryIsInUse(). This is reasonably safe 00009 * since in fact Linux has no excuse for ever returning EIDRM; it doesn't 00010 * track removed segments in a way that would allow distinguishing them from 00011 * private ones. But someday that code might get upgraded, and we'd have 00012 * to have a kernel version test here. 00013 */ 00014 #define HAVE_LINUX_EIDRM_BUG 00015 00016 /* 00017 * Set the default wal_sync_method to fdatasync. With recent Linux versions, 00018 * xlogdefs.h's normal rules will prefer open_datasync, which (a) doesn't 00019 * perform better and (b) causes outright failures on ext4 data=journal 00020 * filesystems, because those don't support O_DIRECT. 00021 */ 00022 #define PLATFORM_DEFAULT_SYNC_METHOD SYNC_METHOD_FDATASYNC
1.7.1