AcoSail/kernel_optimize_test
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bna: fix skb->truesize underestimation

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skb->truesize is not meant to be tracking amount of used bytes
in an skb, but amount of reserved/consumed bytes in memory.

For instance, if we use a single byte in last page fragment,
we have to account the full size of the fragment.

skb->truesize can be very different from skb->len, that has
a very specific safety purpose.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Rasesh Mody <rasesh.mody@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2014-10-17 12:45:55 -07:00 committed by David S. Miller
parent a28205437b
commit f2d9da1a83
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/brocade/bna/bnad.c
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@ -552,6 +552,7 @@ bnad_cq_setup_skb_frags(struct bna_rcb *rcb, struct sk_buff *skb,
len = (vec == nvecs) ?
last_fraglen : unmap->vector.len;
skb->truesize += unmap->vector.len;
totlen += len;
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
@ -563,7 +564,6 @@ bnad_cq_setup_skb_frags(struct bna_rcb *rcb, struct sk_buff *skb,
skb->len += totlen;
skb->data_len += totlen;
skb->truesize += totlen;
}
static inline void