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authorPaolo Abeni <pabeni@redhat.com>2021-10-27 02:29:13 +0300
committerJakub Kicinski <kuba@kernel.org>2021-10-28 04:20:29 +0300
commit5823fc96d754d824bb298622055e8dd5e1252122 (patch)
tree4580981d96cdbb330324800e1ba98989a7ec0c2f /include/net
parent9dfc685e0262d4c5e44e13302f89841fa75173ca (diff)
downloadlinux-5823fc96d754d824bb298622055e8dd5e1252122.tar.xz
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: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/sock.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index ff4e62aa62e5..df0e0efb1882 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -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)