[PATCH] x86: have set_memory_array_{uc,wb} coalesce memtypes.

[Rene Herman]

This is a multi-part message in MIME format.On 21-08-08 19:15, Rene Herman wrote:

> On 21-08-08 14:06, Ingo Molnar wrote:

> > Would be nice to test tip/master - it has both that patch included and 
> > the latest pageattr-array API (with enablement in AGP drivers) 
> > patchset, done by Shaohua Li, based on Dave's original patch.
>
> That patch by itself doesn't help any -- the new set_memory_array_uc() 
> still calls reserve_memtype() for each single page in the array. To 
> help, it needs to coalesce adjacent entries, which is itself easy to do 
> were it not for the need to keep the list of reserved (base,end) pairs 
> around for free_memtype() time (and halfway fail time).

Actually, might as well simply reconstruct the memtype list at free time 
I guess. How is this for a coalescing version of the array functions?

NOTE: I am posting this because I'm going to bed but haven't stared 
comfortably long at this and might be buggy. Compiles, boots and 
provides me with:

root@7ixe4:~# wc -l /debug/x86/pat_memtype_list
53 /debug/x86/pat_memtype_list

otherwise (down from 16384+).

<snore>

Rene.