Messages in this thread | | | Subject | Re: [RFC] bootmem for 2.5 | From | Robert Love <> | Date | 07 Nov 2001 21:06:04 -0500 |
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On Wed, 2001-11-07 at 19:44, William Lee Irwin III wrote: > I've managed to reproduce the problem, and I heard from you elsewhere > that you've verified the fix (although it appeared to reduce the memory > savings to 4KB).
Fix does indeed work. Tested on:
P3-733 i815-based, gained 4KB from 384MB PPro-200 i440FX-based, gained 4KB from 64MB Celeron-500 i440BX-based, gained 8KB from 512MB
No problem on any system -- no difference, in fact, except the gain in total system memory. Most importantly, however, the new design is quite nice. :>
I bet the previous ~100KB gain came from not using APIC. I was comparing APIC without new bootmem to new bootmem without APIC. The much more realistic and modest 4KB is within range of what I would expect, and I bet if I compared with and without bootmem on a non-APIC kernel I would see the same results.
Would you expect problems from laptops or other things with flakey mappings/reservations? I can test it on a couple of laptops if you want...
Robert Love
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