uvm page freelist problem

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

Hi -
I've got a panic "uvm_pglistalloc: page not on freelist"
(in uvm_pglist.c:uvm_pglist_add())
two times now, when starting X where the Intel AGP code
does some larger pglistallocs.

By code inspection I haven't found a place where the
pglists are accessed without acquiring the uvm_fpageqlock.

Can it happen that a page changes its (pg->flags & PG_ZERO)
status in the process which would cause that the page queue
it is looked for at changes?

best regards
Matthias




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