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ixgbevf: add function for checking if we can reuse page 

Introduce ixgbevf_can_reuse_page() similar to the change in ixgbe from
commit af43da0dba
("ixgbe: Add function for checking to see if we can reuse page")

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2017-12-11 10:36:49 -08:00 committed by Jeff Kirsher
parent 9515a2e082
commit a355fd9a1b
1 changed files with 33 additions and 26 deletions
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59
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View File

@ -754,6 +754,38 @@ static inline bool ixgbevf_page_is_reserved(struct page *page)
return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
}
static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer,
struct page *page,
const unsigned int truesize)
{
/* avoid re-using remote pages */
if (unlikely(ixgbevf_page_is_reserved(page)))
return false;
#if (PAGE_SIZE < 8192)
/* if we are only owner of page we can reuse it */
if (unlikely(page_count(page) != 1))
return false;
/* flip page offset to other buffer */
rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
#else
/* move offset up to the next cache line */
rx_buffer->page_offset += truesize;
if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
return false;
#endif
/* Even if we own the page, we are not allowed to use atomic_set()
* This would break get_page_unless_zero() users.
*/
page_ref_inc(page);
return true;
}
/**
* ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
* @rx_ring: rx descriptor ring to transact packets on
@ -815,32 +847,7 @@ static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
(unsigned long)va & ~PAGE_MASK, size, truesize);
/* avoid re-using remote pages */
if (unlikely(ixgbevf_page_is_reserved(page)))
return false;
#if (PAGE_SIZE < 8192)
/* if we are only owner of page we can reuse it */
if (unlikely(page_count(page) != 1))
return false;
/* flip page offset to other buffer */
rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
#else
/* move offset up to the next cache line */
rx_buffer->page_offset += truesize;
if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
return false;
#endif
/* Even if we own the page, we are not allowed to use atomic_set()
* This would break get_page_unless_zero() users.
*/
page_ref_inc(page);
return true;
return ixgbevf_can_reuse_rx_page(rx_buffer, page, truesize);
}
static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring,