Hi Bart,
After loading the pvfs2 kmod, can you do: echo "1" > /proc/sys/pvfs2/debugThen run the same test, and send the dmesg output to me? This should show where the inode allocs/deallocs are going awry.
Thanks, -sam On May 2, 2008, at 4:00 PM, Bart Taylor wrote:
Hey guys,I have been running some tests against the 271 release, and I am having some trouble with multiple mounts on one client. My setup has 2 servers (both meta and io servers on local disk) and one client all of which are running RHEL4 update 6. All that was done on the test client is loading the kernel module and starting pvfs2- client. I can mount the file system once and use it without any problem, but I have attached a test script - takes file system information and a number of times to mount it - that keeps failing. Here are the steps it executes:- For the number of mounts requested - Create a new directory (defaults to /tmp/mount_limit.#) - Mount the specified file system on the new dir - For the number of mounts requested- Do a recursive ls comparison (keep a copy the first time through and compare subsequent mounts to the first)- Unmount the dir - Delete the dirI have been able to consistently reproduce the problem running the attached script like this:./test-mount-limit.pl pvfs2-server1:3334/pvfs2-fs 100It stalls every time with either 36 or 37 mounts remaining. The script has been successfully run on previous versions of pvfs2 up to several thousand mounts.The problem comes at the umount step. Eventually the process just hangs, strands a bunch of mounts, and umount doesn't work as expected after that even from the command line. When it stalls, I start seeing messages like this one in dmesg and syslog: May 2 15:02:44 client-node kernel: pvfs2_kill_sb: (WARNING) number of inode allocs (4100) != number of inode deallocs (2665)I am running this against an almost empty file system since the recursive ls would take a while if it were large. Am I doing something wrong/strange here, or is there a client/kernel problem? The test seems pretty straight-forward, and I've never had an issue with the script before. I'm not sure if it was run against the 2.7.0 release though.Bart. <test-mount-limit.pl>_______________________________________________ Pvfs2-developers mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
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