> On Jun 18, 2017, at 3:34 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > 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. I'm going to submit this again with a comment change and Jeff's Reviewed-by. Can I add your Reviewed-by as well? -- Chuck Lever -- 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
