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    SubjectRe: [-mm PATCH 4/7] Memory controller memory accounting


    Balbir Singh wrote:
    > Add the accounting hooks. The accounting is carried out for RSS and Page
    > Cache (unmapped) pages. There is now a common limit and accounting for both.
    > The RSS accounting is accounted at page_add_*_rmap() and page_remove_rmap()
    > time. Page cache is accounted at add_to_page_cache(),
    > __delete_from_page_cache(). Swap cache is also accounted for.
    >
    > Each page's meta_page is protected with a bit in page flags, this makes
    > handling of race conditions involving simultaneous mappings of a page easier.
    > A reference count is kept in the meta_page to deal with cases where a page
    > might be unmapped from the RSS of all tasks, but still lives in the page
    > cache.
    >
    > Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
    > ---
    >
    > fs/exec.c | 1
    > include/linux/memcontrol.h | 11 +++
    > include/linux/page-flags.h | 3 +
    > mm/filemap.c | 8 ++
    > mm/memcontrol.c | 132 ++++++++++++++++++++++++++++++++++++++++++++-
    > mm/memory.c | 22 +++++++
    > mm/migrate.c | 6 ++
    > mm/page_alloc.c | 3 +
    > mm/rmap.c | 2
    > mm/swap_state.c | 8 ++
    > mm/swapfile.c | 40 +++++++------
    > 11 files changed, 218 insertions(+), 18 deletions(-)
    >

    [snip]

    > diff -puN mm/migrate.c~mem-control-accounting mm/migrate.c
    > --- linux-2.6.22-rc6/mm/migrate.c~mem-control-accounting 2007-07-04 15:05:27.000000000 -0700
    > +++ linux-2.6.22-rc6-balbir/mm/migrate.c 2007-07-04 15:05:27.000000000 -0700
    > @@ -28,6 +28,7 @@
    > #include <linux/mempolicy.h>
    > #include <linux/vmalloc.h>
    > #include <linux/security.h>
    > +#include <linux/memcontrol.h>
    >
    > #include "internal.h"
    >
    > @@ -157,6 +158,11 @@ static void remove_migration_pte(struct
    > return;
    > }
    >
    > + if (mem_container_charge(page, mm)) {

    Minor correction. The above line should be

    if (mem_container_charge(new, mm)) {

    to avoid compilation error.

    --Vaidy

    [snip]
    -
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