forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

net: refactor sk_page_frag_refill()

Browse source 
While working on virtio_net new allocation strategy to increase
payload/truesize ratio, we found that refactoring sk_page_frag_refill()
was needed.

This patch splits sk_page_frag_refill() into two parts, adding
skb_page_frag_refill() which can be used without a socket.

While we are at it, add a minimum frag size of 32 for
sk_page_frag_refill()

Michael will either use netdev_alloc_frag() from softirq context,
or skb_page_frag_refill() from process context in refill_work()
 (GFP_KERNEL allocations)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Michael Dalton <mwdalton@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-10-17 16:27:07 -07:00 • committed by David S. Miller
parent baf785bacc
commit 400dfd3ae8
2 changed files with 25 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/skbuff.h
View file

@ -2062,6 +2062,8 @@ static inline void skb_frag_set_page(struct sk_buff *skb, int f,
__skb_frag_set_page(&skb_shinfo(skb)->frags[f], page);
}
bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio);
/**
* skb_frag_dma_map - maps a paged fragment via the DMA API
* @dev: the device to map the fragment to