From: Jason Xing <xingwanli@xxxxxxxxxxxx>
Prior to this patch, when the count of skbs of one flow is larger than
MAX_GRO_SKBS, gro_flush_oldest() flushes the tail of the list. However,
as we can see in the merge part of skb_gro_receive(), the tail of the
list is the newest, head oldest.
Here, we need to fetch the real oldest one and then process it to lower
the latency.
Fix: 07d78363dc ("net: Convert NAPI gro list into a small hash table.")
Signed-off-by: Jason Xing <xingwanli@xxxxxxxxxxxx>
---
net/core/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 7ee9fec..d52ebdb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6012,7 +6012,7 @@ static void gro_flush_oldest(struct napi_struct *napi, struct list_head *head)
{
struct sk_buff *oldest;
- oldest = list_last_entry(head, struct sk_buff, list);
+ oldest = list_first_entry(head, struct sk_buff, list);
/* We are called with head length >= MAX_GRO_SKBS, so this is
* impossible.
--
1.8.3.1
