On Thu, Aug 5, 2010 at 2:25 AM, Dave Chinner <david@xxxxxxxxxxxxx> wrote: > a couple of things to see if the hang can be caused faster? Maybe > trying these different initial conditions: Together or independently? > > - use a smaller test file OK. My theory [based on no evidence] was that it had to be bigger than RAM size. I'll try less though. > - allocate the file with worst case fragmentation by > writing it backwards in synchronous 4k blocks before > running the test I created the file with dd if=/dev/zero of=... bs=1M count=... How would I "write backwards"? Like truncate and then seek to the end, write, seek back, write, etc? Is there a utility that might do it already? > - preallocating the test file with fallocate() Sure. > > Also, it woul dbe interesting to find out if a newer kernel also > hangs in a similar manner, say 2.6.35? Will do. -- Ilia Mirkin imirkin@xxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
