On Sunday 13 July 2008, Matthew Dillon wrote: > > :Tried using hammer for the first time today. Created a hammer volume on > :two partitions, exported it over nfs, mounted it on my fileserver and > :tried rsyncing some GB of data. After 20+ GB, the machine starts acting > :up: I can't start new processes (command line editing over ssh works though) > :and the rsync processes on the non-dfly box is stuck. Taking a look at the > :console, I can see three "cache_lock: blocked on 0x... (.filename.c.garbage)" > :messages. Some nfs-hammer interaction perhaps? > : > :Aggelos > > It sounds like a buffer cache deadlock, which should be easy for me to > fix. Were you reading from the NFS mount or writing to the NFS mount?
Only rsync (via nfs) was accessing the filesystem. > I'm assuming you are running the latest HEAD. If so, please drop > into the debugger (e.g. ctl-alt-esc) and generate a crash dump, and > get it onto leaf so I can take a look. I am running HEAD from ~28h ago. Unfortunately, IIRC the machine doesn't have a dumpdev configured (yeah, I know). Is there any information I can get you via DDB? Aggelos
