[Ocfs2-users] 答复: remove locks? or copy the whole file?

[Guozhonghua]

　　Hi,
　　
　　I had used the ocfs2 with Linux kernel 2.6.39, there are some problems may be same with you.
　　
　　I download the Linux kernel 3.2.X, and compare the source code with 2.6.39, and find so many codes changed.
　　So as to update the kernel and the problems disappeared.
　　
　　I recommend you update the kernel to recent, may be very stable.
　　I used the recent kernel and the ocfs2 module is very stable and it had run for several weeks without reboot, panic.
　　
　　Another note, you will set the I/O schedule method with deadline, and it will be fitful for ocfs2.
　　
　　elevator=deadline
　　
　　Please prefer the ocfs2_faq.txt for details:
　　
　　Q07   I encounter "Kernel panic - not syncing: ocfs2 is very sorry to be fencing this system by panicing" whenever I run a heavy io
　　      load? A07       We have encountered a bug with the default "cfq" io scheduler which causes a process doing heavy io to temporarily starve out
　　      other processes. While this is not fatal for most environments,
　　      it is for OCFS2 as we expect the hb thread to be r/w to the hb
　　      area atleast once every 12 secs (default).
　　      Bug with the fix has been filed with Red Hat and Novell. For
　　      more, refer to the tracker bug filed on bugzilla:
　　      http://oss.oracle.com/bugzilla/show_bug.cgi?id=671
　　      Till this issue is resolved, one is advised to use the
　　      "deadline" io scheduler. To use deadline, add "elevator=deadline"
　　      to the kernel command line as follows:
　　      1. For SLES9, edit the command line in /boot/grub/menu.lst.
　　      title Linux 2.6.5-7.244-bigsmp  elevator=deadline kernel (hd0,4)/boot/vmlinuz-2.6.5-7.244-bigsmp root=/dev/sda5 vga=0x314 selinux=0 splash=silent resume=/dev/sda3
　　                      elevator=deadline showopts console=tty0
　　                      console=ttyS0,115200 noexec=off initrd (hd0,4)/boot/initrd-2.6.5-7.244-bigsmp
　　      2. For RHEL4, edit the command line in /boot/grub/grub.conf:
　　      title Red Hat Enterprise Linux AS (2.6.9-22.EL) root (hd0,0)
　　              kernel /vmlinuz-2.6.9-22.EL ro root=LABEL=/ console=ttyS0,115200 console=tty0 elevator=deadline noexec=off initrd /initrd-2.6.9-22.EL.img
　　      To see the current kernel command line, do:
　　      # cat /proc/cmdline ==============================================================================
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