Tejun Heo wrote:
Tejun Heo wrote:
Robert Hancock wrote:
Okay, just succeeded on the current #upstream-fixes, attaching the log.
 The machine is a brick after the crash.
I assume the cable got reconnected at 325 seconds? It looks like that
was during error handling for the previous unplug?
I don't remember too well (the console was more than two meters away and
I was just keeping disconnecting and reconnecting.  I noticed the
machine was frozen after I came back to console, so...

[  314.987885] ata3: timeout waiting for ADMA IDLE, stat=0x400
[  314.993556] ata3: timeout waiting for ADMA LEGACY, stat=0x400
[  315.009915] ata3.00: exception Emask 0x10 SAct 0x1 SErr 0x1910000
action 0xa frozen
[  315.017708] ata3.00: ADMA status 0x00000402: , hot unplug
[  315.017714] ata3: SError: { PHYRdyChg Dispar LinkSeq TrStaTrns }
[  315.029239] ata3.00: cmd 60/01:00:92:d7:12/00:00:05:00:00/40 tag 0
ncq 512 in
[  315.029240]          res 40/00:04:92:d7:12/00:04:92:d7:12/40 Emask
0x10 (ATA bus error)
[  315.029243] ata3.00: status: { DRDY }
[  315.048236] ata3: hard resetting link
[  315.774982] ata3: SATA link down (SStatus 0 SControl 300)
[  315.780498] ata3: failed to recover some devices, retrying in 5 secs
[  320.788427] ata3: hard resetting link
[  325.242220] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)

Not sure if the port would be frozen at this point or not?

It would be useful to add some printks to narrow down at what point the
lockup happens. If it's a loop, interrupt storm or something then we can
likely fix it, but if the controller's just locking up then we may be
out of luck..
I think it's machine hard lock up.  NMI watchdog doesn't get triggered.

Is NMI watchdog actually working on this machine?

[ 34.466899] testing NMI watchdog ... <4>WARNING: CPU#0: NMI appears to be stuck (0->0)!
[   34.555056] WARNING: CPU#1: NMI appears to be stuck (0->0)!

Ah.. another thing.  Sometimes when I swap two drives, sata_nv fails to
detect the new drive.  If I pull out the plug and replug it, it then
recognizes the new drive.

No output in that case, I assume?
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