Commit 5823fc96 authored by Paolo Abeni's avatar Paolo Abeni Committed by Jakub Kicinski
Browse files

tcp: define macros for a couple reclaim thresholds 



A following patch is going to implement a similar reclaim schema
for the MPTCP protocol, with different locking.

Let's define a couple of macros for the used thresholds, so
that the latter code will be more easily maintainable.

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 9dfc685e

include/net/sock.h

+7 −2
Original line number Diff line number Diff line
@@ -1573,6 +1573,11 @@ static inline void sk_mem_charge(struct sock *sk, int size) 
	sk->sk_forward_alloc -= size;

}



/* the following macros control memory reclaiming in sk_mem_uncharge()

 */

#define SK_RECLAIM_THRESHOLD	(1 << 21)

#define SK_RECLAIM_CHUNK	(1 << 20)



static inline void sk_mem_uncharge(struct sock *sk, int size)

{

	int reclaimable;
@@ -1589,8 +1594,8 @@ static inline void sk_mem_uncharge(struct sock *sk, int size) 
	 * If we reach 2 MBytes, reclaim 1 MBytes right now, there is

	 * no need to hold that much forward allocation anyway.

	 */

	if (unlikely(reclaimable >= 1 << 21))

		__sk_mem_reclaim(sk, 1 << 20);

	if (unlikely(reclaimable >= SK_RECLAIM_THRESHOLD))

		__sk_mem_reclaim(sk, SK_RECLAIM_CHUNK);

}



static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)