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Message-ID: <1442538276.97487.21.camel@infradead.org>
Date: Fri, 18 Sep 2015 02:04:36 +0100
From: David Woodhouse <dwmw2@...radead.org>
To: Francois Romieu <romieu@...zoreil.com>
Cc: Stephen Hemminger <stephen@...workplumber.org>,
David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net 2/2] 8139cp: reset BQL when ring tx ring cleared
On Fri, 2015-09-18 at 01:44 +0200, Francois Romieu wrote:
> The TxDmaOkLowDesc register may tell if the Tx dma part is still
> making any progress. I have added a TxPoll request. See below.
I've just added that into the original TX timeout handler, since that
doesn't seem to be crashing the box for me as long as I avoid the IRQ
storm.
Not sure what we learn from it ('desc 6550' printed as hex)... I've
also made it dump the TX descriptor ring (skb, addr, opts1, opts2):
[ 1733.027156] 8139cp 0000:00:0b.0 eth1: Transmit timeout, status c 2b head 25 tail 22 desc 6550 0 80ff
[ 1733.036819] TX ring 00: (null) 1dd68d8c 3000cb67 0
[ 1733.037040] TX ring 01: (null) 1dd8774c 3000cb67 0
[ 1733.037040] TX ring 02: (null) 1dd86e7c 30000a08 0
[ 1733.037040] TX ring 03: (null) 1dd865ac 30000a08 0
[ 1733.037040] TX ring 04: (null) 1dd8540c 30000a08 0
[ 1733.037040] TX ring 05: (null) 1dd85cdc 30000a08 0
[ 1733.037040] TX ring 06: (null) 1dd84b3c 30000a08 0
[ 1733.037040] TX ring 07: (null) 1dd8399c 30000a08 0
[ 1733.037040] TX ring 08: (null) 1dd8426c 30000a08 0
[ 1733.037040] TX ring 09: (null) 1dd830cc 30000a08 0
[ 1733.037040] TX ring 10: (null) 1dd81f2c 30000a08 0
[ 1733.037040] TX ring 11: (null) 1dd8165c 30000a08 0
[ 1733.037040] TX ring 12: (null) 1dd827fc 30000a08 0
[ 1733.037040] TX ring 13: (null) 1dd80d8c 30000a08 0
[ 1733.037040] TX ring 14: (null) 1dd804bc 30000a08 0
[ 1733.037040] TX ring 15: (null) 1dd6ee7c 30000a08 0
[ 1733.037040] TX ring 16: (null) 1dd6f74c 30000a08 0
[ 1733.037040] TX ring 17: (null) 1dd6e5ac 30000a08 0
[ 1733.037040] TX ring 18: (null) 1dd6dcdc 30000a08 0
[ 1733.037040] TX ring 19: (null) 1dd6cb3c 3000f804 0
[ 1733.037040] TX ring 20: (null) 1dd8de02 300083da 0
[ 1733.037040] TX ring 21: (null) 1dd8da02 30000000 0
[ 1733.037040] TX ring 22: defcc240 1dd6d40c b00005ea 0
[ 1733.037040] TX ring 23: decdb900 1dd6b99c b0000046 0
[ 1733.037040] TX ring 24: ddd27c00 1dd6b0cc b00005ea 0
[ 1733.037040] TX ring 25: (null) 1dd6e5ac 3000ca24 0
[ 1733.037040] TX ring 26: (null) 1dd6dcdc 3000ca24 0
[ 1733.037040] TX ring 27: (null) 1dd6d40c 3000ca24 0
[ 1733.037040] TX ring 28: (null) 1dd6cb3c 3000ca24 0
[ 1733.037040] TX ring 29: (null) 1dd6c26c 3000ca24 0
[ 1733.037040] TX ring 30: (null) 1dd6b99c 3000ca24 0
[ 1733.037040] TX ring 31: (null) 1dd6b0cc 3000ca24 0
[ 1733.037040] TX ring 32: (null) 1dd6a7fc 3000ca24 0
[ 1733.037040] TX ring 33: (null) 1dd69f2c 3000ca24 0
[ 1733.037040] TX ring 34: (null) 1dd68d8c 3000ca24 0
[ 1733.037040] TX ring 35: (null) 1dd6965c 3000cb67 0
[ 1733.037040] TX ring 36: (null) 1dd684bc 3000cb67 0
[ 1733.037040] TX ring 37: (null) 1dd86e7c 3000cb67 0
[ 1733.037040] TX ring 38: (null) 1dd8774c 3000cb67 0
[ 1733.037040] TX ring 39: (null) 1dd865ac 3000cb67 0
[ 1733.037040] TX ring 40: (null) 1dd85cdc 3000cb67 0
[ 1733.037040] TX ring 41: (null) 1dd8540c 3000cb67 0
[ 1733.037040] TX ring 42: (null) 1dd84b3c 3000cb67 0
[ 1733.037040] TX ring 43: (null) 1dd8426c 3000cb67 0
[ 1733.037040] TX ring 44: (null) 1dd8399c 3000cb67 0
[ 1733.037040] TX ring 45: (null) 1dd830cc 3000cb67 0
[ 1733.037040] TX ring 46: (null) 1dd81f2c 3000cb67 0
[ 1733.037040] TX ring 47: (null) 1dd827fc 3000cb67 0
[ 1733.037040] TX ring 48: (null) 1dd8165c 3000cb67 0
[ 1733.037040] TX ring 49: (null) 1dd80d8c 3000cb67 0
[ 1733.037040] TX ring 50: (null) 1dd804bc 3000cb67 0
[ 1733.037040] TX ring 51: (null) 1dd6f74c 3000cb67 0
[ 1733.037040] TX ring 52: (null) 1dd6ee7c 3000cb67 0
[ 1733.037040] TX ring 53: (null) 1dd6dcdc 3000cb67 0
[ 1733.037040] TX ring 54: (null) 1dd6d40c 3000cb67 0
[ 1733.037040] TX ring 55: (null) 1dd6e5ac 3000cb67 0
[ 1733.037040] TX ring 56: (null) 1dd6cb3c 3000cb67 0
[ 1733.037040] TX ring 57: (null) 1dd6c26c 3000cb67 0
[ 1733.037040] TX ring 58: (null) 1dd6b99c 3000cb67 0
[ 1733.037040] TX ring 59: (null) 1dd6b0cc 3000cb67 0
[ 1733.037040] TX ring 60: (null) 1dd6a7fc 3000cb67 0
[ 1733.037040] TX ring 61: (null) 1dd69f2c 3000cb67 0
[ 1733.037040] TX ring 62: (null) 1dd6965c 3000cb67 0
[ 1733.037040] TX ring 63: (null) 1dd684bc 7000cb67 0
And another time...
[ 3436.024610] 8139cp 0000:00:0b.0 eth1: Transmit timeout, status c 2b head 6 tail 1 desc 1400 0 80ff
[ 3436.034101] TX ring 00: (null) 1dc4dcdc 30000888 0
[ 3436.034494] TX ring 01: deffff00 1dc64e02 b000006a 0
[ 3436.034494] TX ring 02: ddc35180 1dc4d40c b0000036 0
[ 3436.034494] TX ring 03: ddc35480 1dc4cb3c b0000036 0
[ 3436.034494] TX ring 04: defff780 1dc4b99c b0000249 0
[ 3436.034494] TX ring 05: defff900 1dc4c26c b00005ea 0
[ 3436.034494] TX ring 06: (null) 1dc64e02 30003c30 0
[ 3436.034494] TX ring 07: (null) 1dc5165c 30003c30 0
[ 3436.034494] TX ring 08: (null) 1dc64e02 30000000 0
[ 3436.034494] TX ring 09: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 10: (null) 1dc504bc 30000000 0
[ 3436.034494] TX ring 11: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 12: (null) 1dc64e02 30004881 0
[ 3436.034494] TX ring 13: (null) 1dc64e0a 3000fb66 0
[ 3436.034494] TX ring 14: (null) 1dc64e02 3000c031 0
[ 3436.034494] TX ring 15: (null) 1dc64e02 3000c031 0
[ 3436.034494] TX ring 16: (null) 1dc64e0a 30000100 0
[ 3436.034494] TX ring 17: (null) 1dc64e0a 3000a684 0
[ 3436.034494] TX ring 18: (null) 1dc50d8c 30000100 0
[ 3436.034494] TX ring 19: (null) 1dc5f74c 30000100 0
[ 3436.034494] TX ring 20: (null) 1dc64e02 30000100 0
[ 3436.034494] TX ring 21: (null) 1dc64e02 30000327 0
[ 3436.034494] TX ring 22: (null) 1dc64e02 30002100 0
[ 3436.034494] TX ring 23: (null) 1dc64e0a 3000bd84 0
[ 3436.034494] TX ring 24: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 25: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 26: (null) 1dc64e02 30004881 0
[ 3436.034494] TX ring 27: (null) 1dc64e0a 30000a00 0
[ 3436.034494] TX ring 28: (null) 1dc64e02 30000a00 0
[ 3436.034494] TX ring 29: (null) 1dc64e0a 3000ed83 0
[ 3436.034494] TX ring 30: (null) 1dc64e02 30009600 0
[ 3436.034494] TX ring 31: (null) 1dc64e0a 30001b98 0
[ 3436.034494] TX ring 32: (null) 1dc64e02 30000008 0
[ 3436.034494] TX ring 33: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 34: (null) 1dc64e02 3000dd86 0
[ 3436.034494] TX ring 35: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 36: (null) 1dc64e02 30000000 0
[ 3436.034494] TX ring 37: (null) 1dc64e0a 30000000 0
[ 3436.034494] TX ring 38: (null) 1dc64e02 3000b963 0
[ 3436.034494] TX ring 39: (null) 1dc64e0a 30000100 0
[ 3436.034494] TX ring 40: (null) 1dc64e02 3000b263 0
[ 3436.034494] TX ring 41: (null) 1dc64e0a 3000b008 0
[ 3436.034494] TX ring 42: (null) 1dc64e02 30000000 0
[ 3436.034494] TX ring 43: (null) 1dc64e0a 30004011 0
[ 3436.034494] TX ring 44: (null) 1dc64e02 30000000 0
[ 3436.034494] TX ring 45: (null) 1dc64e0a 30004011 0
[ 3436.034494] TX ring 46: (null) 1dc64e02 30000000 0
[ 3436.034494] TX ring 47: (null) 1dc64e0a 30004011 0
[ 3436.034494] TX ring 48: (null) 1dc5e5ac 30005f06 0
[ 3436.034494] TX ring 49: (null) 1dc5ee7c 30002fc0 0
[ 3436.034494] TX ring 50: (null) 1dc5dcdc 3000b008 0
[ 3436.034494] TX ring 51: (null) 1dc5d40c 30006364 0
[ 3436.034494] TX ring 52: (null) 1dc5cb3c 30006364 0
[ 3436.034494] TX ring 53: (null) 1dc5c26c 30000300 0
[ 3436.034494] TX ring 54: (null) 1dc5b99c 30000300 0
[ 3436.034494] TX ring 55: (null) 1dc5b0cc 30003500 0
[ 3436.034494] TX ring 56: (null) 1dc64e02 30000888 0
[ 3436.034494] TX ring 57: (null) 1dc5a7fc 3000f1d3 0
[ 3436.034494] TX ring 58: (null) 1dc59f2c 3000f1d3 0
[ 3436.034494] TX ring 59: (null) 1dc5965c 3000f1d3 0
[ 3436.034494] TX ring 60: (null) 1dc58d8c 3000f1d3 0
[ 3436.034494] TX ring 61: (null) 1dc4f74c 30002e33 0
[ 3436.034494] TX ring 62: (null) 1dc4ee7c 30002e33 0
[ 3436.034494] TX ring 63: (null) 1dc4e5ac 70000888 0
... and another (without all the extra debugging, and without the
WARN_ON, it does seem to survive without triggering the IRQ storm)
[ 3551.027167] 8139cp 0000:00:0b.0 eth1: Transmit timeout, status c 2b head 19 tail 16 desc 14f0 0 80ff
[ 3551.036837] TX ring 00: (null) 1dce04bc 30000000 0
[ 3551.037058] TX ring 01: (null) 1dce0d8c 30000000 0
[ 3551.037058] TX ring 02: (null) 1dd6f74c 30000b66 0
[ 3551.037058] TX ring 03: (null) 1dd6ee7c 30000b66 0
[ 3551.037058] TX ring 04: (null) 1dd6e5ac 30000b66 0
[ 3551.037058] TX ring 05: (null) 1dd6d40c 30000b66 0
[ 3551.037058] TX ring 06: (null) 1dd6dcdc 30000b66 0
[ 3551.037058] TX ring 07: (null) 1dd6c26c 30000000 0
[ 3551.037058] TX ring 08: (null) 1dd6cb3c 30000000 0
[ 3551.037058] TX ring 09: (null) 1dd6b99c 3000f804 0
[ 3551.037058] TX ring 10: (null) 1dd6b0cc 30001105 0
[ 3551.037058] TX ring 11: (null) 1dd6a7fc 30001105 0
[ 3551.037058] TX ring 12: (null) 1dd69f2c 30001105 0
[ 3551.037058] TX ring 13: (null) 1dd6965c 3000493b 0
[ 3551.037058] TX ring 14: (null) 1dd68d8c 3000cea5 0
[ 3551.037058] TX ring 15: (null) 1dc4f74c 30001b55 0
[ 3551.037058] TX ring 16: ddd2f9c0 1dd684bc b00005ea 0
[ 3551.037058] TX ring 17: defc76c0 1dc4e5ac b00005ea 0
[ 3551.037058] TX ring 18: ddd38300 1dc4ee7c b00005ea 0
[ 3551.037058] TX ring 19: (null) 1dc49f2c 3000b838 0
[ 3551.037058] TX ring 20: (null) 1dc48d8c 300035ae 0
[ 3551.037058] TX ring 21: (null) 1dc4965c 300035ae 0
[ 3551.037058] TX ring 22: (null) 1dc484bc 300085b9 0
[ 3551.037058] TX ring 23: (null) 2774c 300085b9 0
[ 3551.037058] TX ring 24: (null) 26e7c 300085b9 0
[ 3551.037058] TX ring 25: (null) 25cdc 3000d5c4 0
[ 3551.037058] TX ring 26: (null) 1dc1fe02 300025d0 0
[ 3551.037058] TX ring 27: (null) 265ac 300025d0 0
[ 3551.037058] TX ring 28: (null) 2540c 3000b838 0
[ 3551.037058] TX ring 29: (null) 2426c 3000b838 0
[ 3551.037058] TX ring 30: (null) 24b3c 3000b838 0
[ 3551.037058] TX ring 31: (null) 2399c 3000b838 0
[ 3551.037058] TX ring 32: (null) 230cc 3000b838 0
[ 3551.037058] TX ring 33: (null) 227fc 30000040 0
[ 3551.037058] TX ring 34: (null) 21f2c 30000040 0
[ 3551.037058] TX ring 35: (null) 2165c 30000040 0
[ 3551.037058] TX ring 36: (null) 204bc 3000b838 0
[ 3551.037058] TX ring 37: (null) 20d8c 3000b838 0
[ 3551.037058] TX ring 38: (null) 1dc4f74c 3000b838 0
[ 3551.037058] TX ring 39: (null) 1dc4ee7c 3000b838 0
[ 3551.037058] TX ring 40: (null) 1dc4dcdc 3000b838 0
[ 3551.037058] TX ring 41: (null) 1dc4d40c 3000b838 0
[ 3551.037058] TX ring 42: (null) 1dc4e5ac 3000b838 0
[ 3551.037058] TX ring 43: (null) 1dc4c26c 3000b838 0
[ 3551.037058] TX ring 44: (null) 1dc4b99c 3000b838 0
[ 3551.037058] TX ring 45: (null) 1dc4cb3c 3000b838 0
[ 3551.037058] TX ring 46: (null) 1dc4b0cc 30000008 0
[ 3551.037058] TX ring 47: (null) 1dc4a7fc 30000008 0
[ 3551.037058] TX ring 48: (null) 1dc49f2c 30000008 0
[ 3551.037058] TX ring 49: (null) 1dc48d8c 30000a00 0
[ 3551.037058] TX ring 50: (null) 1dc4965c 30000a00 0
[ 3551.037058] TX ring 51: (null) 1dc484bc 30000a00 0
[ 3551.037058] TX ring 52: (null) 1dce774c 30000a00 0
[ 3551.037058] TX ring 53: (null) 1dce6e7c 30000a00 0
[ 3551.037058] TX ring 54: (null) 1dce5cdc 30000a00 0
[ 3551.037058] TX ring 55: (null) 1dce65ac 30000000 0
[ 3551.037058] TX ring 56: (null) 1dce540c 30000000 0
[ 3551.037058] TX ring 57: (null) 1dce426c 30000a66 0
[ 3551.037058] TX ring 58: (null) 1dce4b3c 30000a66 0
[ 3551.037058] TX ring 59: (null) 1dce399c 30000a66 0
[ 3551.037058] TX ring 60: (null) 1dce30cc 30000a66 0
[ 3551.037058] TX ring 61: (null) 1dce27fc 30000000 0
[ 3551.037058] TX ring 62: (null) 1dce165c 30000000 0
[ 3551.037058] TX ring 63: (null) 1dce1f2c 70000000 0
--
dwmw2
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