Re: Highmem on PPC?

On Thu, Feb 07, 2002 at 10:51:05PM +0100, Benjamin Herrenschmidt wrote:

quoted

as a result.  Any ideas for stressing the system harder?

Well, I don't know what your previous kernel had, but recent _devel
has my fix to limit lowmem to what can be mapped by BATs on SMP.
That may help with the 7410. If the machine ends up beeing really
stable, then I'll have to look into CPU bugs for my 7450 problems.

The previous kernel was 2.4.12 based, with a hack from me to limit
lowmem to 512MB.  And I was using SCSI, which has hardware bugs on my
board, in addition to exercising bounce buffers much more strongly.
In summary, I don't have the faintest idea what was causing the
hangs.  I'll try booting my old 2.4.12 kernel NFS root and see if it's
just as stable.

-VAL

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The previous kernel was 2.4.12 based, with a hack from me to limit
lowmem to 512MB.  And I was using SCSI, which has hardware bugs on my
board, in addition to exercising bounce buffers much more strongly.
In summary, I don't have the faintest idea what was causing the
hangs.  I'll try booting my old 2.4.12 kernel NFS root and see if it's
just as stable.

Could well be a generic kernel bug fixed in the meantime. 2.4.12 wasn't
bug free...

Ben.


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