Re: [PATCH 2/2] kvm tools: Add virtio-9p

Ingo Molnar
2011-05-18T08:09:03Z

* Eric Van Hensbergen <ericvh@gmail.com> wrote:

> > - Update atime/mtime in p9_wstat, not really needed.
>
> The underlying storage may handle this for you, I think 9p avoids
> updating atime by default, at least in caching scenarios -- too much
> unnecessary protocol traffic.

Yeah, atime is absolutely painful all around - just don't do it by default and
maybe allow it via some option. Very little userspace depends on it and almost
none will break outright, there is a large number of filesystems that do not do
any (or do a poor) atime update.

So if atimes are not provided straight away it will be very clear from the
beginning that atime isnt something that will be there by default.

Thanks,

Ingo