When using isolcpus my servers, I found that this parameter does not
work with the last CPU.
For example, on my Dell 2850 with two Xeon cpus which has 4 CPUS , with
isolcpus=3, I see a lot of non-kernel processes ( sendmail, mingetty,
cupsd ... ) on cpu 3. When using isolcpus with 0,1, or 2, none of these
shows up. I use ps axo comm,psr | grep cpu-number for a quick view of
processes on a given cpu.
On another system using Core i7, which has 8 CPU, using isolcpus=7 gives
the same result. When trying with 0 to 7, it works as expect.
The first system has 32-bit RHEL5.3 , the second system has 64-bit
RHEL5.3 so I do not think the problem depends on the platforms.
Anybody experience this problem ? Or maybe I do something wrong ?
Thanks,
Vu
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