Author: gibbs
Date: Sat Jan 29 02:36:45 2011
New Revision: 218056
URL: http://svn.freebsd.org/changeset/base/218056
Log:
Fix bug in the netfront driver that caused excessive packet drops during
receive processing.
Remove unnecessary restrictions on the mbuf chain length built during an
LRO receive. This restriction was copied from the Linux netfront driver
where the LRO implementation cannot handle more than 18 discontinuities.
The FreeBSD implementation has no such restriction.
MFC after: 1 week
Modified:
head/sys/dev/xen/netfront/netfront.c
Modified: head/sys/dev/xen/netfront/netfront.c
==============================================================================
--- head/sys/dev/xen/netfront/netfront.c Sat Jan 29 00:53:58 2011
(r218055)
+++ head/sys/dev/xen/netfront/netfront.c Sat Jan 29 02:36:45 2011
(r218056)
@@ -1273,7 +1273,6 @@ xennet_get_responses(struct netfront_inf
struct mbuf *m, *m0, *m_prev;
grant_ref_t ref = xennet_get_rx_ref(np, *cons);
RING_IDX ref_cons = *cons;
- int max = 5 /* MAX_TX_REQ_FRAGS + (rx->status <= RX_COPY_THRESHOLD) */;
int frags = 1;
int err = 0;
u_long ret;
@@ -1416,20 +1415,10 @@ next_skip_queue:
frags++;
}
*list = m0;
-
- if (unlikely(frags > max)) {
- if (net_ratelimit())
- WPRINTK("Too many frags\n");
- printf("%s: too many frags %d > max %d\n", __func__, frags,
- max);
- err = E2BIG;
- }
-
*cons += frags;
-
*pages_flipped_p = pages_flipped;
- return err;
+ return (err);
}
static void
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
