* Re: [parisc-linux] C3000 HPMC with high NFS traffic. 99% it's ASTRO's
[not found] <200408131656.i7DGuWF19777@opus.allegro.com>
@ 2004-08-13 17:06 ` James Bottomley
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From: James Bottomley @ 2004-08-13 17:06 UTC (permalink / raw)
To: Stan Sieler; +Cc: PARISC list
On Fri, 2004-08-13 at 12:56, Stan Sieler wrote:
> If it helps, the instruction trapping appears to be:
> LDWAX 0(0,19),19
> and r19 has fed30000 ... an I/O space address.
Actually that's the back end of a LBA I/O cycle generation (this is the
actual read that guarantees completion semantics---see lba_pci.c). The
HPMC occurred because port 0x1008 timed out on an outl, I think.
That's tulip register CSR1 (i.e. the tulip driver was trying to force an
immediate transmit). I assume this must be either because the tulip
failed to respond to the outl in time or because the Astro couldn't get
on the bus in time.
James
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2004-08-13 17:06 ` [parisc-linux] C3000 HPMC with high NFS traffic. 99% it's ASTRO's James Bottomley
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