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| author | Alexander Duyck <alexander.h.duyck@redhat.com> | 2015-05-06 21:12:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-12 10:39:26 -0400 |
| commit | 181edb2bfa22b50817684135ab6430ed2808abf0 (patch) | |
| tree | 3715f6eb8768c5a8ef58dff4524ccfe3d87344d6 | |
| parent | b63ae8ca096dfdbfeef6a209c30a93a966518853 (diff) | |
| download | linux-181edb2bfa22b50817684135ab6430ed2808abf0.tar.gz linux-181edb2bfa22b50817684135ab6430ed2808abf0.tar.bz2 linux-181edb2bfa22b50817684135ab6430ed2808abf0.zip | |
net: Add skb_free_frag to replace use of put_page in freeing skb->head
This change adds a function called skb_free_frag which is meant to
compliment the function netdev_alloc_frag. The general idea is to enable a
more lightweight version of page freeing since we don't actually need all
the overhead of a put_page, and we don't quite fit the model of __free_pages.
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/skbuff.h | 5 | ||||
| -rw-r--r-- | net/core/skbuff.c | 10 |
2 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0039fcc45b3b..c0b574a414e7 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2182,6 +2182,11 @@ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev, return __netdev_alloc_skb_ip_align(dev, length, GFP_ATOMIC); } +static inline void skb_free_frag(void *addr) +{ + __free_page_frag(addr); +} + void *napi_alloc_frag(unsigned int fragsz); struct sk_buff *__napi_alloc_skb(struct napi_struct *napi, unsigned int length, gfp_t gfp_mask); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index dcc0e07abf47..d67e612bf0ef 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -436,7 +436,7 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, skb = __build_skb(data, len); if (unlikely(!skb)) { - put_page(virt_to_head_page(data)); + skb_free_frag(data); return NULL; } @@ -490,7 +490,7 @@ struct sk_buff *__napi_alloc_skb(struct napi_struct *napi, unsigned int len, skb = __build_skb(data, len); if (unlikely(!skb)) { - put_page(virt_to_head_page(data)); + skb_free_frag(data); return NULL; } @@ -549,10 +549,12 @@ static void skb_clone_fraglist(struct sk_buff *skb) static void skb_free_head(struct sk_buff *skb) { + unsigned char *head = skb->head; + if (skb->head_frag) - put_page(virt_to_head_page(skb->head)); + skb_free_frag(head); else - kfree(skb->head); + kfree(head); } static void skb_release_data(struct sk_buff *skb) |