Date: Wed, 3 Nov 2010 16:11:48 -0600 From: "Kenneth D. Merry" <ken@freebsd.org> To: Yuriy Kohut <ykohut@onapp.com> Cc: "freebsd-xen@FreeBSD.org" <freebsd-xen@freebsd.org> Subject: Re: FreeBSD 8.1-RELEASE-p1 i386 xennet_get_responses messages in console Message-ID: <20101103221148.GA17412@nargothrond.kdm.org> In-Reply-To: <88955623-5D2F-453A-B7EF-9E1058370B14@onapp.com> References: <88955623-5D2F-453A-B7EF-9E1058370B14@onapp.com>
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On Thu, Oct 28, 2010 at 15:02:41 +0300, Yuriy Kohut wrote:
> Hi,
>
> Does somebody know haw to deal with the following massages in the console:
>
> xennet_get_responses: too many frags 6 > max 5
What are you using for your Domain 0?
I haven't run into that before, so it would be nice to have a setup that
would trigger this problem.
It looks like there is a limit on the number of segments for LRO. I think
the limit is arbitrary, but I need to look at it a bit more.
Try the attached patch and let me know whether it works for you. It
disables the limit on the number of receive segments.
Thanks,
Ken
--
Kenneth Merry
ken@FreeBSD.ORG
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filename="netfront.c.rx_max.stable.20101103.txt"
==== //depot/SpectraBSD/stable/8/sys/dev/xen/netfront/netfront.c#2 - /usr/home/kenm/perforce4/SpectraBSD/stable/8/sys/dev/xen/netfront/netfront.c ====
*** /tmp/tmp.3226.94 Wed Nov 3 16:09:10 2010
--- /usr/home/kenm/perforce4/SpectraBSD/stable/8/sys/dev/xen/netfront/netfront.c Wed Nov 3 16:08:35 2010
***************
*** 1272,1278 ****
--- 1272,1280 ----
struct mbuf *m, *m0, *m_prev;
grant_ref_t ref = xennet_get_rx_ref(np, *cons);
RING_IDX ref_cons = *cons;
+ #if 0
int max = 5 /* MAX_TX_REQ_FRAGS + (rx->status <= RX_COPY_THRESHOLD) */;
+ #endif
int frags = 1;
int err = 0;
u_long ret;
***************
*** 1416,1421 ****
--- 1418,1424 ----
}
*list = m0;
+ #if 0
if (unlikely(frags > max)) {
if (net_ratelimit())
WPRINTK("Too many frags\n");
***************
*** 1423,1428 ****
--- 1426,1432 ----
max);
err = E2BIG;
}
+ #endif
*cons += frags;
--azLHFNyN32YCQGCU--
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