[Devel] Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core)

[Kirill Korotaev]

Rohit Seth wrote:
> On Thu, 2006-08-17 at 01:22 +0100, Alan Cox wrote:
> 
>>Ar Mer, 2006-08-16 am 12:15 -0700, ysgrifennodd Rohit Seth:
>>
>>>resources will be allocated/freed in context of a user process.  And at
>>>that time we know if a allocation should succeed or not.  So we may
>>>actually not need to track kernel pages that closely.
>>
>>Quite the reverse, tracking kernel pages is critical, 
> 
> 
> Having the knowledge of how many kernel pages are getting used by each
> container is indeed very useful.  But as long as the context in which
> they are created and destroyed is identifiable, there is no need to
> really physically tag each page with container id.  And for the cases
> where we have no context, it will be worth while to see if mapping field
> could be used.
as I described in another email this field is also reused for tracking
user pages.

Kirill