Jeremy Fitzhardinge wrote: > Is there any real use in having a ctor/dtor for the pgd cache? Given > that all pgd allocation happens via pgd_alloc/pgd_free, why not just > fold the [cd]tor in? > > I'm asking because Xen wants pgd[3] to be unshared in the PAE case, and > it looks to me like the easiest way to handle that is by making > pgd_alloc/free pv-ops and doing the appropriate thing in the Xen code. > Would need to sort out the vmalloc mapping replication as well, but I > think that's pretty straightforward. > Actually, vmalloc mapping replication is not quite straightforward - you have to replicate it under locks and track all pgds using pgd_list if you support large pages. Zach
