Reviewed-by:
On Wed, 10 Sep 2014, Ilya Dryomov wrote:
> From: Sage Weil <sage@xxxxxxxxxx>
>
> We preallocate a few of the message types we get back from the mon. If we
> get a larger message than we are expecting, fall back to trying to allocate
> a new one instead of blindly using the one we have.
>
> CC: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Sage Weil <sage@xxxxxxxxxx>
> ---
> net/ceph/mon_client.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
> index 067d3af2eaf6..61fcfc304f68 100644
> --- a/net/ceph/mon_client.c
> +++ b/net/ceph/mon_client.c
> @@ -1181,7 +1181,15 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
> if (!m) {
> pr_info("alloc_msg unknown type %d\n", type);
> *skip = 1;
> + } else if (front_len > m->front_alloc_len) {
> + pr_warning("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n",
> + front_len, m->front_alloc_len,
> + (unsigned int)con->peer_name.type,
> + le64_to_cpu(con->peer_name.num));
> + ceph_msg_put(m);
> + m = ceph_msg_new(type, front_len, GFP_NOFS, false);
> }
> +
> return m;
> }
>
> --
> 1.7.10.4
>
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