lkml.org 
[lkml]   [2012]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v5 05/14] Add a __GFP_KMEMCG flag
    Date
    This flag is used to indicate to the callees that this allocation is a
    kernel allocation in process context, and should be accounted to
    current's memcg. It takes numerical place of the of the recently removed
    __GFP_NO_KSWAPD.

    [ v4: make flag unconditional, also declare it in trace code ]

    Signed-off-by: Glauber Costa <glommer@parallels.com>
    Acked-by: Johannes Weiner <hannes@cmpxchg.org>
    Acked-by: Rik van Riel <riel@redhat.com>
    Acked-by: Mel Gorman <mel@csn.ul.ie>
    Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    CC: Christoph Lameter <cl@linux.com>
    CC: Pekka Enberg <penberg@cs.helsinki.fi>
    CC: Michal Hocko <mhocko@suse.cz>
    CC: Suleiman Souhlal <suleiman@google.com>
    CC: Tejun Heo <tj@kernel.org>
    ---
    include/linux/gfp.h | 3 ++-
    include/trace/events/gfpflags.h | 1 +
    2 files changed, 3 insertions(+), 1 deletion(-)

    diff --git a/include/linux/gfp.h b/include/linux/gfp.h
    index 02c1c97..9289d46 100644
    --- a/include/linux/gfp.h
    +++ b/include/linux/gfp.h
    @@ -31,6 +31,7 @@ struct vm_area_struct;
    #define ___GFP_THISNODE 0x40000u
    #define ___GFP_RECLAIMABLE 0x80000u
    #define ___GFP_NOTRACK 0x200000u
    +#define ___GFP_KMEMCG 0x400000u
    #define ___GFP_OTHER_NODE 0x800000u
    #define ___GFP_WRITE 0x1000000u

    @@ -87,7 +88,7 @@ struct vm_area_struct;

    #define __GFP_OTHER_NODE ((__force gfp_t)___GFP_OTHER_NODE) /* On behalf of other node */
    #define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) /* Allocator intends to dirty page */
    -
    +#define __GFP_KMEMCG ((__force gfp_t)___GFP_KMEMCG) /* Allocation comes from a memcg-accounted resource */
    /*
    * This may seem redundant, but it's a way of annotating false positives vs.
    * allocations that simply cannot be supported (e.g. page tables).
    diff --git a/include/trace/events/gfpflags.h b/include/trace/events/gfpflags.h
    index 9391706..730df12 100644
    --- a/include/trace/events/gfpflags.h
    +++ b/include/trace/events/gfpflags.h
    @@ -36,6 +36,7 @@
    {(unsigned long)__GFP_RECLAIMABLE, "GFP_RECLAIMABLE"}, \
    {(unsigned long)__GFP_MOVABLE, "GFP_MOVABLE"}, \
    {(unsigned long)__GFP_NOTRACK, "GFP_NOTRACK"}, \
    + {(unsigned long)__GFP_KMEMCG, "GFP_KMEMCG"}, \
    {(unsigned long)__GFP_OTHER_NODE, "GFP_OTHER_NODE"} \
    ) : "GFP_NOWAIT"

    --
    1.7.11.7


    \
     
     \ /
      Last update: 2012-10-16 13:01    [W:2.316 / U:0.064 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site