Subject: Re: kernel map entry merging and PR 24039
To: Matt Thomas <matt@3am-software.com>
From: Andrew Brown <atatat@atatdot.net>
List: tech-kern
Date: 02/10/2004 11:29:27
On Tue, Feb 10, 2004 at 08:01:45AM -0800, Matt Thomas wrote:
>>...
>> how can asserting UVM_FLAG_NOMERGE prevent splitting unless the
>> allocation is less than three pages in size?  can't i simply make a
>> three page allocation with UVM_FLAG_NOMERGE set and then unmap the
>> middle page?
>
>True but the current uses of uvm_map and uvm_unmap in the kernel
>don't do that.
>
>They simply undo a previous uvm_map.

well, okay then.  :)

so how many kernel map entries do you have today?

-- 
|-----< "CODE WARRIOR" >-----|
codewarrior@daemon.org             * "ah!  i see you have the internet
twofsonet@graffiti.com (Andrew Brown)                that goes *ping*!"
werdna@squooshy.com       * "information is power -- share the wealth."