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authorEric Dumazet <edumazet@google.com>2015-05-15 12:39:25 -0700
committerDavid S. Miller <davem@davemloft.net>2015-05-17 22:45:48 -0400
commit1a24e04e4b50939daa3041682b38b82c896ca438 (patch)
treedc47be63f82d9c6be6d193607688d10b3f78a366 /net/core
parent4633c9e07b3b7d7fc262a5f59ff635c1f702af6f (diff)
net: fix sk_mem_reclaim_partial()
sk_mem_reclaim_partial() goal is to ensure each socket has one SK_MEM_QUANTUM forward allocation. This is needed both for performance and better handling of memory pressure situations in follow up patches. SK_MEM_QUANTUM is currently a page, but might be reduced to 4096 bytes as some arches have 64KB pages. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/sock.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index c18738a795b0..29124fcdc42a 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2069,12 +2069,13 @@ EXPORT_SYMBOL(__sk_mem_schedule);
/**
* __sk_reclaim - reclaim memory_allocated
* @sk: socket
+ * @amount: number of bytes (rounded down to a SK_MEM_QUANTUM multiple)
*/
-void __sk_mem_reclaim(struct sock *sk)
+void __sk_mem_reclaim(struct sock *sk, int amount)
{
- sk_memory_allocated_sub(sk,
- sk->sk_forward_alloc >> SK_MEM_QUANTUM_SHIFT);
- sk->sk_forward_alloc &= SK_MEM_QUANTUM - 1;
+ amount >>= SK_MEM_QUANTUM_SHIFT;
+ sk_memory_allocated_sub(sk, amount);
+ sk->sk_forward_alloc -= amount << SK_MEM_QUANTUM_SHIFT;
if (sk_under_memory_pressure(sk) &&
(sk_memory_allocated(sk) < sk_prot_mem_limits(sk, 0)))

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