Albert Lee wrote:
Jeff,
Patch 2/3: pdc2027x mdelay() problem fix for micro-partitioning
Description:
The mdelay(100) does not delay exactly 100 ms on IBM power5 machines
when the power5 CPU micro-partitioning feature is turned on.
Ex. If micro-partitioning is set to use 0.1 of the CPU time, mdelay(100)
will delay about 1 sec instead of 100ms.
Changes:
- Use do_gettimeofday() to measure the actual elapsed time.
According to the documentation, do_gettimeofday() works on most platforms
except some old M68K machines. There are no PCI slots on M68K machines,
so using do_gettimeofday() seems to be safe here.
NAK.
mdelay() should be investigated as to why its not working on your
platform. do_gettimeofday() is -less- granular and accurate than
mdelay(), usually.
Jeff
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