> Hi.
>
> Isn't the page coloring algoritm in _vm_page_list_find totally bogus?
>
No, it's not. The comment is, however, misplaced. It describes
the behavior of an inline function in vm_page.h, and not the function
it precedes.
> It skips queue pq[index & PQ_L2_MASK].
>
That's correct. The inline function vm_page_list_find() in vm_page.h
has already failed to allocate a page of the desired color, index,
and so _vm_page_list_find() is called to allocate a page of ANY other
color it can find.
Rather than choose a random page, the odd-looking loop in
_vm_page_list_find() tries to find a page whose color is unlikely
to equal the neighboring pages in the vm object if colored allocation
for them succeeded.
Alan
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