Re: Read/Write NFS I/O performance degraded by FLUSH_STABLE page flushing

J. Bruce Fields
2009-06-05T19:54:50Z

On Fri, Jun 05, 2009 at 12:12:08PM -0400, Trond Myklebust wrote:
> On Fri, 2009-06-05 at 10:54 -0400, Christoph Hellwig wrote:
> > On Mon, Jun 01, 2009 at 06:30:08PM -0400, J. Bruce Fields wrote:
> > > > NFSD stops calling ->fsync without a file struct.
> > > >
> > > > I think the open file cache will help us with that, if we can extend
> > > > it to also cache open file structs for directories.
> > >
> > > Krishna Kumar--do you think that'd be a reasonable thing to do?
> >
> > Btw, do you have at least the basic open files cache queue for 2.6.31?
> >
>
> Now that _will_ badly screw up the write gathering heuristic...

How?

--b.