The simul code, test #14, does a shared create: all processes try to do "creat(file, 0644)" at the same time through the VFS. There is no O_EXCL, so what should happen here is that they all succeed, although under the hood, all but one will probably have to unwind the SYS_CREATE when they notice that the dirent already exists from another process.
This used to work just fine. With the addition of the ncache code to pvfs2-client, I'm guessing, things break. The test works again if I add "-n 0" to the pvfs2-client command line. My setup is all x86_64. Two IO servers, one of which does MD too. Two other nodes as clients, running: mpiexec -pernode -np 2 $simul/simul -d /pvfs-ib -i 14 -n 200 -N 1 eventually one will fail, usually around the second iteration, with 14:46:54: Process 1(ib26): FAILED in simul_creat, creat failed: No such file or directory Does anybody know the ncache code well enough to figure this out? I find the -EEXIST fixup code in client-core, but can't see what kind of ncache invalidation should presumably happen around there. -- Pete _______________________________________________ Pvfs2-developers mailing list Pvfs2-developers@beowulf-underground.org http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers