Re: [PATCH 4/7] netprio_cgroup: limit the maximum css->id to USHRT_MAX

[Daniel Wagner]

On 11/19/2015 07:52 PM, Tejun Heo wrote:
> netprio builds per-netdev contiguous priomap array which is indexed by
> css->id.  The array is allocated using kzalloc() effectively limiting
> the maximum ID supported to some thousand range.  This patch caps the
> maximum supported css->id to USHRT_MAX which should be way above what
> is actually useable.
> 
> This allows reducing sock->sk_cgrp_prioidx to u16 from u32.  The freed
> up part will be used to overload the cgroup related fields.
> sock->sk_cgrp_prioidx's position is swapped with sk_mark so that the
> two cgroup related fields are adjacent.
> 
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
> Cc: Daniel Wagner <daniel.wagner@xxxxxxxxxxxx>

Acked-by: Daniel Wagner <daniel.wagner@xxxxxxxxxxxx>
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