Date: Fri, 11 Aug 2006 21:27:19 -0600 From: Scott Long <scottl@samsco.org> To: Jo Rhett <jrhett@svcolo.com> Cc: freebsd-scsi@freebsd.org Subject: Re: myl driver failing during server shutdown Message-ID: <44DD4A97.2050203@samsco.org> In-Reply-To: <27BE7ACB-BCF9-40A5-96F4-CE90A297CE71@svcolo.com> References: <27BE7ACB-BCF9-40A5-96F4-CE90A297CE71@svcolo.com>
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Jo Rhett wrote:
> So I had thought that my motherboard didn't honor the acpi reset or
> power down command. It turns out that it does just fine -- but the
> shutdown is failing/hanging. Attaching a serial console to it, I see
> this:
>
> Waiting (max 60 seconds) for system process `syncer' to stop...
> Syncing disks, vnodes remaining...3 0 2 0 0 done
> All buffers synced.
> Uptime: 6d18h12m6s
> (da0:mly0:1:0:0): Synchronize cache failed, status == 0xb, scsi status
> == 0x0
> mly0: flushing cache...kernel trap 12 with interrupts disabled
>
>
> Fatal trap 12: page fault while in kernel mode
> fault virtual address = 0x0
> fault code = supervisor read, page not present
> instruction pointer = 0x20:0x0
> stack pointer = 0x28:0xe25c1ac0
> frame pointer = 0x28:0x0
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, def32 1, gran 1
> processor eflags = resume, IOPL = 0
> current process = 1 (init)
> trap number = 12
> panic: page fault
> Uptime: 6d19h12m38s
> (da0:mly0:1:0:0): Synchronize cache failed, status == 0xb, scsi status
> == 0x0
> Dumping 991 MB (2 chunks)
> Aborting dump due to I/O error.
> status == 0xb, scsi status == 0x0
>
> ** DUMP FAILED (ERROR 5) **
>
> This is 100% reproducable. Anyone have any ideas where to start on
> this problem? What does this error mean?
>
> Note: if you want to debug this, I can provide root access. It's just
> a personal box :-)
>
Give this (untested) patch a try. If that doesn't work, it's going to
need a lot more digging, and I unfortunately don't have the time for
that right now.
Scott
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Index: mly.c
===================================================================
RCS file: /usr/ncvs/src/sys/dev/mly/mly.c,v
retrieving revision 1.39
diff -u -r1.39 mly.c
--- mly.c 8 Aug 2005 12:23:26 -0000 1.39
+++ mly.c 10 Aug 2006 11:57:54 -0000
@@ -1128,9 +1128,12 @@
mc->mc_data = *data;
mc->mc_flags |= MLY_CMD_DATAOUT;
}
- mc->mc_length = datasize;
- mc->mc_packet->generic.data_size = datasize;
+ } else if (datasize != 0) {
+ error = EINVAL;
+ goto out;
}
+ mc->mc_length = datasize;
+ mc->mc_packet->generic.data_size = datasize;
/* run the command */
if ((error = mly_immediate_command(mc)))
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