From: Eric Dumazet <eric.duma...@gmail.com>
Date: Sat, 03 Oct 2015 06:27:28 -0700
> From: Eric Dumazet <eduma...@google.com>
>
> Before letting request sockets being put in TCP/DCCP regular
> ehash table, we need to add either :
>
> - SLAB_DESTROY_BY_RCU flag to their kmem_cache
> - add RCU grace period before freeing them.
>
> Since we carefully respected the SLAB_DESTROY_BY_RCU protocol
> like ESTABLISH and TIMEWAIT sockets, use it here.
>
> req_prot_init() being only used by TCP and DCCP, I did not add
> a new slab_flags into their rsk_prot, but reuse prot->slab_flags
>
> Since all reqsk_alloc() users are correctly dealing with a failure,
> add the __GFP_NOWARN flag to avoid traces under pressure.
>
> Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
Applied, thanks Eric.
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