lkml.org 
[lkml]   [2008]   [Sep]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 1/12] memcg avoid accounting special mappings not on LRU
    KAMEZAWA Hiroyuki wrote:
    > On Fri, 26 Sep 2008 13:55:54 +0530
    > Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
    >
    >> KAMEZAWA Hiroyuki wrote:
    >>> There are not-on-LRU pages which can be mapped and they are not worth to
    >>> be accounted. (becasue we can't shrink them and need dirty codes to handle
    >>> specical case) We'd like to make use of usual objrmap/radix-tree's protcol
    >>> and don't want to account out-of-vm's control pages.
    >>>
    >>> When special_mapping_fault() is called, page->mapping is tend to be NULL
    >>> and it's charged as Anonymous page.
    >>> insert_page() also handles some special pages from drivers.
    >>>
    >>> This patch is for avoiding to account special pages.
    >>>
    >> Hmm... I am a little concerned that with these changes actual usage will much
    >> more than what we report in memory.usage_in_bytes. Why not move them to
    >> non-reclaimable LRU list as unevictable pages (once those patches go in, we can
    >> push this as well).
    >
    > Because they are not on LRU ...i.e. !PageLRU(page)
    >

    I understand.. Thanks for clarifying.. my concern is w.r.t accounting, we
    account it in RSS (file RSS).

    --
    Balbir


    \
     
     \ /
      Last update: 2008-09-26 11:37    [W:0.024 / U:31.488 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site