3.1.2 Matrix Server RHEL4 Release Notes

PolyServe Matrix Server Release Notes 11

monitors. Changes to the application affect all Matrix Server entities

assigned to the application.

PolyServe Kernel Patches

The PolyServe Matrix Server 3.1.2 distribution contains a Linux kernel

patch set that can be applied at the customer’s discretion. These problems

have been reported to Red Hat.

The following patches are provided for the 2.6.9-11.EL kernel:

• 00_pid_alive.patch. This patch corrects a process management bug in

the Linux kernel. Without this patch, the system may crash when

programs such as ps or top are used.

• 01_lock_rename.patch. This patch corrects a locking problem in the code

that implements the rename(2) system call in the Linux kernel.

Without this patch, the system may hang during rename operations.

• 02_sysfs_remove_dir.patch. This patch fixes a NULL pointer

dereferencing error in sysfs_remove_dir().

• 03_rescan.patch. This patch restores the original return value of

check_partition() to 0 instead of -EIO. Returning -EIO breaks some of

the partition code, which can prevent psd devices from being

imported into the matrix. If this patch is not installed, you will need to

ensure that all LUNs have a valid partition table in place.

• 04_imapping_race.patch. This patch adds a reference to a filesystem

inode when it is acquired to prevent a race condition that can occur

when the i_mapping pointer is performing sync operations. Without

this patch, the kernel will panic if the race occurs.

The following patches are provided for the 2.6.9-22.EL and 2.6.9-22.0.1.EL

kernels:

• 00_lock_rename.patch. This patch corrects a locking problem in the code

that implements the rename(2) system call in the Linux kernel.

Without this patch, the system may hang during rename operations.

• 01_sysfs_remove_dir.patch. This patch fixes a NULL pointer

dereferencing error in sysfs_remove_dir().