Re: [fuse-devel] [fuse] Speeding up readdir()

[Miklos Szeredi <miklos@szeredi.hu>]

On Fri, Dec 7, 2018 at 2:13 PM Nikolaus Rath <Nikolaus@rath.org> wrote:
>
> On Dec 07 2018, Miklos Szeredi <miklos@szeredi.hu> wrote:
> > On Fri, Dec 7, 2018 at 1:55 PM Nikolaus Rath <Nikolaus@rath.org> wrote:
> >
> >> I am not 100% sure because of the atime invalidation issue. Apart from
> >> that, it definitely was not timed out.
> >
> > The atime invalidation is different because that never results in
> > LOOKUP requests being generated.
> >
> >> Are you saying that I should not be seeing lookup() requests after
> >> (non-plus) readdir() if the dentry is already cached?
> >
> > If the dentry is already cached, and the timeout has not expired, then
> > you shouldn't see LOOKUP requests for that dentry.
> >
> > Hmm, I see some strange entry invalidation calls in NFS export.  Do
> > you know if there's NFS export or open_by_handle(2) calls?
>
> Definitely no NFS export. I can't say for sure about open_by_handle, I
> do not have the source code of the client application.

Anyway, a debug log might give some ideas; could you please send one
with the weird behaviror?

Thanks,
Miklos