From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Knorr Subject: Re: bug: slab corruption (net backend?) Date: 07 Jul 2005 16:41:13 +0200 Message-ID: <877jg2he5y.fsf@bytesex.org> References: <20050707094132.GA29339@bytesex> <20050707113514.GA30556@bytesex> <20050707122242.GA31229@bytesex> <87br5ehi15.fsf@bytesex.org> <21e655c4f716b89263c35ea14940ebfe@cl.cam.ac.uk> <20050707141809.GA32468@bytesex> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <20050707141809.GA32468@bytesex> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: xen-devel@lists.xensource.com, Steven Hand List-Id: xen-devel@lists.xenproject.org Gerd Knorr 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 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 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 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 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 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 */