Messages in this thread |  | | Date | Sun, 5 Nov 2000 14:36:43 +0100 (CET) | From | Rik van Riel <> | Subject | Re: 2.4.0-test10 Sluggish After Load |
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On 4 Nov 2000, Christoph Rohland wrote: > Rik van Riel <riel@conectiva.com.br> writes: > > Indeed, shared memory performance still sucks rocks. > > No, it's not a performance problem. It is a hard lockup problem on > highmem machines. > > I do see two problems here: > 1) shm_swap_core does not handle the failure of prepare_higmem_swapout > right and basically cannot do so. It gets called zone independant > and should probably get called per zone. At least it has to react:
AFAIC try_to_swap_out can handle this situation fine, it shouldn't be very difficult to get shm_swap to handle it too...
Unfortunately I don't have a really big memory machine so I cannot test this stuff :(
> You see: you only have 5+27+27=59 pages under your control...
Ughhhh. Maybe we need some rebalancing there as well. That's a maximum of 5 pages of executable text mapped into all processes...
regards,
Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength.
http://www.conectiva.com/ http://www.surriel.com/
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