Re: [PATCH 18/18] export sysctl symbols needed by ip_vs_sync

To: davem@xxxxxxxxxxxxx
Subject: Re: [PATCH 18/18] export sysctl symbols needed by ip_vs_sync
Cc: Simon Horman <horms@xxxxxxxxxxxx>, lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, netfilter-devel@xxxxxxxxxxxxxxx, Wensong Zhang <wensong@xxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>, Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>, Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Sun, 6 May 2012 22:54:12 +0200
Hi David,

The IPVS people needs this patch for net-next to allow to tune the
socket buffer for ipvs_sync (the state synchronization that they do
from kernel-space). This exports sysctl_wmem_max and sysctl_rmem_max
living in net/core/sock.c. So far, they've been using global socket
tuning to make them bigger (this avoids overruning the socket under
high peak of state-change synchronization).

I think this is out of my scope (since it's out of the netfilter

Would you acknowledge it, please?

On Wed, May 02, 2012 at 03:22:42PM +0900, Simon Horman wrote:
> From: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
> To build ip_vs as a module sysctl_rmem_max and sysctl_wmem_max
> needs to be exported.
> The dependency was added by "ipvs: wakeup master thread" patch
> Signed-off-by: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
> Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
> ---
>  net/core/sock.c |    2 ++
>  1 file changed, 2 insertions(+)
> diff --git a/net/core/sock.c b/net/core/sock.c
> index c7e60ea..ac3131a 100644
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -258,7 +258,9 @@ static struct lock_class_key af_callback_keys[AF_MAX];
>  /* Run time adjustable parameters. */
>  __u32 sysctl_wmem_max __read_mostly = SK_WMEM_MAX;
> +EXPORT_SYMBOL(sysctl_wmem_max);
>  __u32 sysctl_rmem_max __read_mostly = SK_RMEM_MAX;
> +EXPORT_SYMBOL(sysctl_rmem_max);
>  __u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX;
>  __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
> -- 
> 1.7.10
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