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Date:      Mon, 28 Feb 2005 13:39:22 -0800
From:      Kris Kennaway <kris@obsecurity.org>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        sparc64@FreeBSD.org
Subject:   Re: "esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 4000" on e4500
Message-ID:  <20050228213922.GA99607@xor.obsecurity.org>
In-Reply-To: <20050227021000.GA47037@xor.obsecurity.org>
References:  <20050227021000.GA47037@xor.obsecurity.org>

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On Sat, Feb 26, 2005 at 06:10:01PM -0800, Kris Kennaway wrote:
> An e4500 running RELENG_5 crashed overnight with the following.  I
> asked Justin Gibbs about it, and he suggested that
>=20
> "The driver seems to be complaining that its internal state is
> indicating that a DMA is *not* in progress, but the chip is saying it
> is."
>=20
> Kris
>=20
> db> show msgbuf
> msgbufp =3D 0xfffff80001407fe0
> magic =3D 63062, size =3D 32736, r=3D 115944, w =3D 116197, ptr =3D 0xfff=
ff80001400000, cksum=3D 2460862
> esp0: !TC on DATA XFER [intr 10, stat 87, step 4] prevphase 0, resid 4000
> esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
> /var: bad dir ino 94212 at offset 0: mangled entry
> panic: ufs_dirbad: bad dir

The above panic caused quite serious data corruption, and after
reinstalling 5.3-STABLE and starting a buildworld it recurred with:

esp0: unexpected disconnect [state 5, intr 20, stat 90, phase(c 100, p 0)];=
 sending REQUEST SENSE
esp0: !TC on DATA XFER [intr 10, stat 87, step 4] prevphase 0, resid 4000
esp0: !TC on DATA XFER [intr 10, stat 87, step 4] prevphase 0, resid 2800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 87, step 4] prevphase 0, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 1, resid 800
esp0: !TC on DATA XFER [intr 10, stat 87, step 4] prevphase 0, resid 4000
/usr: bad dir ino 612938 at offset 0: mangled entry
panic: ufs_dirbad: bad dir

Kris
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