On Sat, Jun 17, 2017 at 01:23:24PM -0400, Chuck Lever wrote: > > > On Jun 17, 2017, at 11:07 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > > > On Fri, Jun 16, 2017 at 11:22:54AM -0400, Chuck Lever wrote: > >> Running a multi-threaded 8KB fio test (70/30 mix), three or four out > >> of twelve of the jobs fail when using krb5i. The failure is an EIO > >> on a read. > > > > Just curious: what is the backing fs that you tested with? I'd be > > curious if you see this on XFS for example. > > I was able to reproduce this with a tmpfs share and > with an XFS share on NVMe LUNs. Interesting. XFS actually locks out all writes while doing a buffered read, so we end up with two different read instance for the hash vs the data, which does indeed sound dangerous. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
