[Ocfs2-users] global_bitmap lock busy for a long time

Andy aryan1 at allantgroup.com
Wed May 8 12:07:21 PDT 2013


	I am often experiencing long delays on ocfs2 volumes when another 
process is writing to the fs.  The delays seem to coincide with a busy 
lock on //global_bitmap.  I can understand why a busy lock on the 
global_bitmap would cause delays (especially write delays), but it seems 
to block reads too?  Also, the lock seems to be held for quite a long 
time at times, probably over a minute.  This is on a 3TB fs that is 80% 
full.  This is a real problem for me because nfs mounts fail and then 
give stale NFS handle even after the volume is free again.  Is there a 
way to improve the length of time the global_bitmap is locked?

Thanks,

Andy







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