From: Gerd Knorr <kraxel@suse.de>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com, Steven Hand <Steven.Hand@cl.cam.ac.uk>
Subject: Re: bug: slab corruption (net backend?)
Date: 07 Jul 2005 16:41:13 +0200 [thread overview]
Message-ID: <877jg2he5y.fsf@bytesex.org> (raw)
In-Reply-To: <20050707141809.GA32468@bytesex>
Gerd Knorr <kraxel@suse.de> writes:
> The tcpdump was taken on eskarina (not the xen host), so the
> packets really go out to the wire ...
more detailed tcpdump of another connection stall:
16:32:44.311412 IP master-xen.ssh > eskarina.49606: P 2256:2304(48) ack 2335 win 2728 <nop,nop,timestamp 4294945237 2086500670>
0x0000: 4510 0064 71b9 4000 4006 3798 952c b36c E..dq.@.@.7..,.l
0x0010: 952c b36d 0016 c1c6 8b94 e24a 5c6d 220a .,.m.......J\m".
0x0020: 8018 0aa8 7028 0000 0101 080a ffff a9d5 ....p(..........
0x0030: 7c5d 793e 8889 411e e090 5982 d79e fc6b |]y>..A...Y....k
0x0040: d9c6 3535 b109 5a9b e38f 3a3a e695 29af ..55..Z...::..).
0x0050: 81db 9dc7 a1a5 56c1 5586 1f3d ab76 1fde ......V.U..=.v..
0x0060: 46d5 5d6f F.]o
16:32:44.311416 IP eskarina.49606 > master-xen.ssh: . ack 2304 win 2420 <nop,nop,timestamp 2086500691 4294945237>
0x0000: 4510 0034 68ba 4000 4006 40c7 952c b36d E..4h.@.@.@..,.m
0x0010: 952c b36c c1c6 0016 5c6d 220a 8b94 e27a .,.l....\m"....z
0x0020: 8010 0974 8e2c 0000 0101 080a 7c5d 7953 ...t.,......|]yS
0x0030: ffff a9d5 ....
16:32:44.311568 IP master-xen.ssh > eskarina.49606: P 2304:2384(80) ack 2335 win 2728 <nop,nop,timestamp 4294945237 2086500670>
0x0000: 4510 0084 71bb 4000 4006 3776 952c b36c E...q.@.@.7v.,.l
0x0010: 952c b36d 0016 c1c6 8b94 e27a 5c6d 220a .,.m.......z\m".
0x0020: 8018 0aa8 0ee4 0000 0101 080a ffff a9d5 ................
0x0030: 7c5d 793e b9cb e472 6e18 cf4c f551 af4d |]y>...rn..L.Q.M
0x0040: 0131 a5c8 178e 610f 08ce 253b 084f b7cc .1....a...%;.O..
0x0050: d7bb a84a 4865 322d 3634 ce9c 5026 2ad6 ...JHe2-64..P&*.
0x0060: b41b 830b 0000 0000 0000 0000 0000 0000 ................
0x0070: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0080: 0000 0000 ....
16:32:44.311866 IP master-xen.ssh > eskarina.49606: P 2384:2448(64) ack 2335 win 2728 <nop,nop,timestamp 4294945237 2086500670>
0x0000: 4510 0074 71bd 4000 4006 3784 952c b36c E..tq.@.@.7..,.l
0x0010: 952c b36d 0016 c1c6 8b94 e2ca 5c6d 220a .,.m........\m".
0x0020: 8018 0aa8 045e 0000 0101 080a ffff a9d5 .....^..........
0x0030: 7c5d 793e 2134 146a 6adb 9a0e abc3 fc9d |]y>!4.jj.......
0x0040: 1350 7f6f eac9 b4d4 5059 6cf4 dcdd 085f .P.o....PYl...._
0x0050: a943 68d7 9f60 b799 ddbf 0eee 6a8c 850d .Ch..`......j...
0x0060: 4294 4541 19c3 eddf 7fe5 afe5 6573 5c8f B.EA........es\.
0x0070: 62f2 a6ae b...
16:32:44.311875 IP eskarina.49606 > master-xen.ssh: . ack 2304 win 2420 <nop,nop,timestamp 2086500692 4294945237,nop,nop,sack sack 1 {2384:2448} >
0x0000: 4510 0040 68bc 4000 4006 40b9 952c b36d E..@h.@.@.@..,.m
0x0010: 952c b36c c1c6 0016 5c6d 220a 8b94 e27a .,.l....\m"....z
0x0020: b010 0974 7b15 0000 0101 080a 7c5d 7954 ...t{.......|]yT
0x0030: ffff a9d5 0101 050a 8b94 e2ca 8b94 e30a ................
The 2304:2384 payload package is broken and causes the stalls: End of
package is filled with zeros. master-xen tried to resend the broken
package over and over again, but that doesn't work of course ...
Gerd
--
panic("it works"); /* avoid being flooded with debug messages */
next prev parent reply other threads:[~2005-07-07 14:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-07 9:41 bug: slab corruption (net backend?) Gerd Knorr
2005-07-07 10:11 ` Steven Hand
2005-07-07 11:35 ` Gerd Knorr
2005-07-07 12:05 ` Keir Fraser
2005-07-07 12:22 ` Gerd Knorr
2005-07-07 12:48 ` Gerd Knorr
2005-07-07 13:17 ` Gerd Knorr
2005-07-07 14:05 ` Keir Fraser
2005-07-07 14:18 ` Gerd Knorr
2005-07-07 14:41 ` Gerd Knorr [this message]
2005-07-07 16:06 ` Nivedita Singhvi
2005-07-11 13:25 ` Gerd Knorr
2005-07-11 13:37 ` Keir Fraser
2005-07-11 14:29 ` Bin Ren
2005-07-07 15:54 ` Gerd Knorr
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