Bug#657078: patches to reduce the footprint of the nfs4 idmapper

[Jonathan Nieder <jrnieder@gmail.com>]

clone 657078 -1
retitle 657078 nfs: page allocation failure in nfs_idmap_new
severity 657078 important
tags 657078 + upstream patch
quit

Rik Theys wrote:

> I'm experiencing the following Red Hat bug[1] on RHEL and also on
> Debian.
>
> I've noticed Fedora has started to ship an update with two patches
> that reduce the footprint of the nfs4 id mapper which should prevent
> this (or seriously limit the chance).

Ah, you are talking about the following, which I missed before:

[1] https://bugzilla.redhat.com/show_bug.cgi?id=593035

Could you describe the problem in more detail?  Under what
circumstances does the idmapper provoke allocation failures, and how
effectively do the patches avoid trouble?

> NFSv4: Further reduce the footprint of the idmapper
> commit 685f50f9188ac1e8244d0340a9d6ea36b6136cec
>
> NFSv4: Reduce the footprint of the idmapper
> commit d073e9b541e1ac3f52d72c3a153855d9a9ee3278

Whether or not these get applied in the stable tree (which would be
nice if it can be justified), I think we definitely want them in
Debian, so cloning the bug to track that.

Thanks,
Jonathan