lkml.org 
[lkml]   [2011]   [Jan]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 3/3] Provide control over unmapped pages (v4)
    On Fri, 28 Jan 2011 13:49:28 +0530
    Balbir Singh <balbir@linux.vnet.ibm.com> wrote:

    > * KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2011-01-28 16:56:05]:

    > > BTW, it seems this doesn't work when some apps use huge shmem.
    > > How to handle the issue ?
    > >
    >
    > Could you elaborate further?
    >
    ==
    static inline unsigned long zone_unmapped_file_pages(struct zone *zone)
    {
    unsigned long file_mapped = zone_page_state(zone, NR_FILE_MAPPED);
    unsigned long file_lru = zone_page_state(zone, NR_INACTIVE_FILE) +
    zone_page_state(zone, NR_ACTIVE_FILE);

    /*
    * It's possible for there to be more file mapped pages than
    * accounted for by the pages on the file LRU lists because
    * tmpfs pages accounted for as ANON can also be FILE_MAPPED
    */
    return (file_lru > file_mapped) ? (file_lru - file_mapped) : 0;
    }
    ==

    Did you read ?

    Thanks,
    -Kame



    \
     
     \ /
      Last update: 2011-01-28 09:27    [W:2.930 / U:0.124 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site