Hi,
at least i'm now able to reproduce the issue. I hope this will help to
investigate the issue and hopefully you can reproduce it as well.
I'm using vanilla 3.0.4 kernel + xfs as root filesystem and had detect
hanging taks with 120s set. You'll then see that the bonnie++ command
get's stuck in xlog_grant_log_space while creating or deleting files. I
was using a SSD or a fast Raid 10 (24x SAS Disks) - i was not able to
reproduce it on normal SATA disks even a 20x SATA Raid 10 didn't work.
I used bonnie++ (V 1.96) to reproduce it. Mostly in the 1st run the bug
is triggered - sometimes I needed two runs.
bonnie++ -u root -s 0 -n 1024:32768:0:1024:4096 -d /
I hope that helps - as i now have a testing machine and can trigger the
bug pretty fast (10-30min instead of hours). I can also add debug code
if you want or have one.
Stefan
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