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| author | Eric Dumazet <edumazet@google.com> | 2015-05-15 12:39:25 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-17 22:45:48 -0400 |
| commit | 1a24e04e4b50939daa3041682b38b82c896ca438 (patch) | |
| tree | dc47be63f82d9c6be6d193607688d10b3f78a366 /net/core/sock.c | |
| parent | 4633c9e07b3b7d7fc262a5f59ff635c1f702af6f (diff) | |
| download | linux-1a24e04e4b50939daa3041682b38b82c896ca438.tar.gz linux-1a24e04e4b50939daa3041682b38b82c896ca438.tar.bz2 linux-1a24e04e4b50939daa3041682b38b82c896ca438.zip | |
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/sock.c')
| -rw-r--r-- | net/core/sock.c | 9 |
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))) |