[Pvfs2-users] I/O error

[Pete Wyckoff]

michael.kuhn at stud.uni-heidelberg.de wrote on Sat, 17 Feb 2007 14:32 +0100:
> while doing some I/O visualization we noticed that the attached program
> (MPI-IO.c) produces an I/O error under certain circumstances. The error
> messages printed by the program (MPI-IO.out) and pvfs2-server
> (pvfs2-server.out) are also attached.

Confirmed on IB too.  Appears to be a ROMIO/ad_pvfs2 bug.  Noncontig
in file, contig in mem.  App writes 10 mb but romio calculates 20 mb
and issues a request that tries to access unallocated memory.  See
ad_pvfs2_write.c line 502:  st_fwr_size = 20m.  Perhaps that should
be f_data_wrote?  Or perhaps calculation of fwr_size is wrong?

		-- Pete