Hi, I have the same RHEL 5 situation, and I can add that RHEL 5.1 is scheduled for Q3 (sep-okt). You could download the RHEL 5 Cluster disk (RHEL5 disk 6) on wich the old GFS(6.x) is, and use that. Otherwise the only choice (that I know of) is to start compiling kernels with newer versions of GFS2. Kind Regards Kristoffer -----Oprindelig meddelelse----- Fra: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] På vegne af Steven Whitehouse Sendt: 6. juni 2007 22:25 Til: linux clustering Emne: Re: Problem with gfs2 - waiting for i/o Hi, You are using a rather too old version of GFS2. I'd suggest either using Fedora or the upstream kernel's until GFS2 appears in RHEL 5.1 as the RHEL 5 version is rather out of date I'm afraid, Steve. On Wed, 2007-06-06 at 22:23 +0200, Jean-Marc jmc wrote: > Hi list, > I am new to cluster and gfs so my apologies if I missed something > obvious. > I am having problems using gfs2 filesystems where writing processes > hang forever waiting for i/o. It does not seem to be locking (or even > cluster) related since its reproducible on a local gfs2 filesystem > with 'lock_nolock' as locking protocol. > > I can create and mount the gfs2 file system without any problems. > Creating and writing to files works as well, but when I write larger > amounts of data the process gets stuck waiting for i/o. It doesn't > matter whether I amd using lvm or not thre results are the same. The > hardware is working and I have no problem writing to an ext3 > filesystem on the same device. > > The problem can be reproduced by doing the following: > > ---------------------------------------------------------------------- > --------------------------- [root@indigo ~]# mkfs.gfs2 -p lock_nolock > /dev/cciss/c0d0p3 This will destroy any data on /dev/cciss/c0d0p3. > It appears to contain a gfs2 filesystem. > > Are you sure you want to proceed? [y/n] y > > Device: /dev/cciss/c0d0p3 > Blocksize: 4096 > Device Size 644.44 GB (168935523 blocks) > Filesystem Size: 644.44 GB (168935523 blocks) > Journals: 1 > Resource Groups: 2578 > Locking Protocol: "lock_nolock" > Lock Table: "" > > [root@indigo ~]# mount -o locktable=xyz /dev/cciss/c0d0p3 /export > > [root@indigo ~]# mount|grep /export > /dev/cciss/c0d0p3 on /export type gfs2 > (rw,locktable=xyz,localflocks,localcaching) > > [root@indigo ~]# dd if=/dev/zero of=/export/8GB bs=1024k count=8000 > > ## A partial file is created, but the process never returns, it is > forever waiting for i/o: > [root@indigo ~]# ls -l /export/;ps auxww|grep 8GB total 1995152 > -rw-r--r-- 1 root root 2039009280 Jun 1 07:12 8GB > root 3857 42.8 0.0 4880 1584 pts/0 D 07:12 0:07 dd > if /dev/zero of /export/8GB bs 1024k count 8000 > ---------------------------------------------------------------------- > ------------------------------ > > It's still possible to create new files to the file system but these > processes are also waiting for i/o after a while. > After the mounting there is nothing else appearing in dmesg or > messages log. Since the processes are uninterruptible we are forced to > reboot the machine in order to resolve the lockup. > > Basic info on the system setup: > > HP dl380 G5 2 xeon cpu with dual cores each, 12 GB RAM local raid > controller is p400 but we also reproduced the behaviour on the san > disk (Emulex card) OS is RH 5 (32 bit), output of uname is: > Linux indigo 2.6.18-8.1.4.el5xen #1 SMP Fri May 4 22:42:50 EDT > 2007 i686 i686 i386 GNU/Linux > > The same problem could also be reproduced on RH 4 and Ubuntu 7.04 > > Thanks in advance for your help! > > /jmc > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
