There are some incompatibilities with the following functions compared to 4.2A00:
Number | Item |
|---|---|
1 | Support of sendfile(2) |
2 | Change in operation at the time of specifying the mount option atime |
3 | Cannot create sockets |
4 | Cannot create named pipes |
Note
When the OS before upgrading is RHEL4, an incompatibility of the number 1 occurs.
Incompatibility description
Action of sendfile(2) to the GFS Shared File System has been changed.
Before change: Abnormal exit (return code: -1, errno: EINVAL)
After change: Normal exit
Corrective action
None.
Incompatibility description
Operation at the time of specifying the mount option atime has been changed.
Before change:
The last access time of a file is updated for each file access.
After change:
The last access time of a file is updated when the previous last access time is the same as or older than the last modify time or the last change time. Also, when the previous last access time of a file is old for over a day, it is updated.
Corrective action
To execute the operation performed before change, change the mount option which is described in /etc/fstab from atime to strictatime.
Incompatibility description
Operation when creating sockets on the GFS Shared File System by specifying S_IFSOCK in the second argument of mknod(2) has been changed.
Before change: Normal exit
After change: Abnormal exit (return code: -1, errno: EPERM)
Corrective action
None.
Incompatibility description
Operation when creating named pipes on the GFS Shared File System by specifying S_IFIFO in the second argument of mknod(2) has been changed.
Before change: Normal exit
After change: Abnormal exit (return code: -1, errno: EPERM)
Corrective action
None.
