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Re: [Xen-devel] [PATCH net-next 2/4] xen-netback: add control protocol implementation

From: Paul Durrant <paul.durrant@xxxxxxxxxx>
Date: Thu, 5 May 2016 12:19:28 +0100

> +struct xenvif_hash_cache {
> +     rwlock_t lock;

You really don't want to lock on every SKB hash computation like
this, turn this into a spin lock for locking the write side and
use RCU locking for lookup and usage.


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