* Linux SCSI Error Question with SG Driver
@ 2006-03-09 12:07 Justin Piszcz
2006-03-09 14:23 ` Douglas Gilbert
0 siblings, 1 reply; 2+ messages in thread
From: Justin Piszcz @ 2006-03-09 12:07 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-scsi
I have a tape library connected to a Linux box here and every once and a
while I see these in dmesg:
sg_low_free: bad mem_src=0, buff=0xdb6a8000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb6b0000, rqSz=28672
sg_low_free: bad mem_src=0, buff=0xdb738000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb718000, rqSz=28672
sg_low_free: bad mem_src=0, buff=0xdb680000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb678000, rqSz=28672
sg_low_free: bad mem_src=0, buff=0xdb670000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb668000, rqSz=28672
sg_low_free: bad mem_src=0, buff=0xdb660000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb658000, rqSz=28672
sg_low_free: bad mem_src=0, buff=0xdb650000, rqSz=32768
sg_low_free: bad mem_src=0, buff=0xdb648000, rqSz=28672
Does anyone know what they refer to?
A quick google and newsgroup search just turn out the actual snippets of
code that produce these errors, thanks..
Justin.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Linux SCSI Error Question with SG Driver
2006-03-09 12:07 Linux SCSI Error Question with SG Driver Justin Piszcz
@ 2006-03-09 14:23 ` Douglas Gilbert
0 siblings, 0 replies; 2+ messages in thread
From: Douglas Gilbert @ 2006-03-09 14:23 UTC (permalink / raw)
To: Justin Piszcz; +Cc: linux-kernel, linux-scsi
Justin Piszcz wrote:
> I have a tape library connected to a Linux box here and every once and a
> while I see these in dmesg:
>
> sg_low_free: bad mem_src=0, buff=0xdb6a8000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb6b0000, rqSz=28672
> sg_low_free: bad mem_src=0, buff=0xdb738000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb718000, rqSz=28672
> sg_low_free: bad mem_src=0, buff=0xdb680000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb678000, rqSz=28672
> sg_low_free: bad mem_src=0, buff=0xdb670000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb668000, rqSz=28672
> sg_low_free: bad mem_src=0, buff=0xdb660000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb658000, rqSz=28672
> sg_low_free: bad mem_src=0, buff=0xdb650000, rqSz=32768
> sg_low_free: bad mem_src=0, buff=0xdb648000, rqSz=28672
>
> Does anyone know what they refer to?
Justin,
That looks like the sg driver in the lk 2.4 series.
When it comes to free up some memory in sg_low_free()
it checks where the memory was sourced from. A
mem_src of 0 is not defined hence the error message.
Hard to say why this happens as the buff addresses
and rqSz values look reasonable.
Doug Gilbert
^ permalink raw reply [flat|nested] 2+ messages in thread
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