On Jun 3, 2016, at 8:56 PM, Al Viro wrote: > On Fri, Jun 03, 2016 at 07:58:37PM -0400, Oleg Drokin wrote: > >>> EOPENSTALE, that is... Oleg, could you check if the following works? >> >> Yes, this one lasted for an hour with no crashing, so it must be good. >> Thanks. >> (note, I am not equipped to verify correctness of NFS operations, though). > > I suspect that Jeff Layton might have relevant regression tests. > Incidentally, > we really need a consolidated regression testsuite, including the tests you'd > been running. Right now there's some stuff in xfstests, LTP and cthon; if > anything, this mess shows just why we need all of that and then some in > a single place. Lustre stuff has caught a 3 years old NFS bug (missing > d_drop() in nfs_atomic_open()) and a year-old bug in handling of EOPENSTALE > retries on the last component of a trailing non-embedded symlink. Neither > is hard to trigger; it's just that relevant tests hadn't been run on NFS, > period.
BTW, the nets also have brought in another use after free in nfs4 state tracking code (this is the one I was trying to hunt down from the start). I'll submit a patch shortly. And also there's a mysterious ext4 data corruption that I do not really fully understand but only hit once so far.
