diff options
| author | Eric Dumazet <[email protected]> | 2015-05-15 19:39:25 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-05-18 02:45:48 +0000 |
| commit | 1a24e04e4b50939daa3041682b38b82c896ca438 (patch) | |
| tree | dc47be63f82d9c6be6d193607688d10b3f78a366 /net/core/sock.c | |
| parent | net-packet: fix null pointer exception in rollover mode (diff) | |
| download | kernel-1a24e04e4b50939daa3041682b38b82c896ca438.tar.gz kernel-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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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))) |