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Message-ID: <1276506144.2478.40.camel@edumazet-laptop> Date: Mon, 14 Jun 2010 11:02:24 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: netdev <netdev@...r.kernel.org> Subject: [PATCH net-next-2.6] ip_frag: Remove some atomic ops Instead of doing one atomic operation per frag, we can factorize them. Signed-off-by: Eric Dumazet <eric.dumazet@...il.com> --- net/ipv4/ip_fragment.c | 3 +-- net/ipv6/reassembly.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index 75347ea..963c368 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -556,7 +556,6 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, skb_shinfo(head)->frag_list = head->next; skb_push(head, head->data - skb_network_header(head)); - atomic_sub(head->truesize, &qp->q.net->mem); for (fp=head->next; fp; fp = fp->next) { head->data_len += fp->len; @@ -566,8 +565,8 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, else if (head->ip_summed == CHECKSUM_COMPLETE) head->csum = csum_add(head->csum, fp->csum); head->truesize += fp->truesize; - atomic_sub(fp->truesize, &qp->q.net->mem); } + atomic_sub(head->truesize, &qp->q.net->mem); head->next = NULL; head->dev = dev; diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 6d4292f..a630506 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -524,7 +524,6 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, skb_shinfo(head)->frag_list = head->next; skb_reset_transport_header(head); skb_push(head, head->data - skb_network_header(head)); - atomic_sub(head->truesize, &fq->q.net->mem); for (fp=head->next; fp; fp = fp->next) { head->data_len += fp->len; @@ -534,8 +533,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, else if (head->ip_summed == CHECKSUM_COMPLETE) head->csum = csum_add(head->csum, fp->csum); head->truesize += fp->truesize; - atomic_sub(fp->truesize, &fq->q.net->mem); } + atomic_sub(head->truesize, &fq->q.net->mem); head->next = NULL; head->dev = dev; -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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