lkml.org 
[lkml]   [2012]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH -V3 3/8] hugetlb: add charge/uncharge calls for HugeTLB alloc/free
    Date
    From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>

    This adds necessary charge/uncharge calls in the HugeTLB code

    Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    ---
    mm/hugetlb.c | 21 ++++++++++++++++++++-
    mm/memcontrol.c | 5 +++++
    2 files changed, 25 insertions(+), 1 deletions(-)

    diff --git a/mm/hugetlb.c b/mm/hugetlb.c
    index fe7aefd..b7152d1 100644
    --- a/mm/hugetlb.c
    +++ b/mm/hugetlb.c
    @@ -21,6 +21,8 @@
    #include <linux/rmap.h>
    #include <linux/swap.h>
    #include <linux/swapops.h>
    +#include <linux/memcontrol.h>
    +#include <linux/page_cgroup.h>

    #include <asm/page.h>
    #include <asm/pgtable.h>
    @@ -542,6 +544,9 @@ static void free_huge_page(struct page *page)
    BUG_ON(page_mapcount(page));
    INIT_LIST_HEAD(&page->lru);

    + if (mapping)
    + mem_cgroup_hugetlb_uncharge_page(h - hstates,
    + pages_per_huge_page(h), page);
    spin_lock(&hugetlb_lock);
    if (h->surplus_huge_pages_node[nid] && huge_page_order(h) < MAX_ORDER) {
    update_and_free_page(h, page);
    @@ -1019,12 +1024,15 @@ static void vma_commit_reservation(struct hstate *h,
    static struct page *alloc_huge_page(struct vm_area_struct *vma,
    unsigned long addr, int avoid_reserve)
    {
    + int ret, idx;
    struct hstate *h = hstate_vma(vma);
    struct page *page;
    + struct mem_cgroup *memcg = NULL;
    struct address_space *mapping = vma->vm_file->f_mapping;
    struct inode *inode = mapping->host;
    long chg;

    + idx = h - hstates;
    /*
    * Processes that did not create the mapping will have no reserves and
    * will not have accounted against quota. Check that the quota can be
    @@ -1039,6 +1047,12 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
    if (hugetlb_get_quota(inode->i_mapping, chg))
    return ERR_PTR(-VM_FAULT_SIGBUS);

    + ret = mem_cgroup_hugetlb_charge_page(idx, pages_per_huge_page(h),
    + &memcg);
    + if (ret) {
    + hugetlb_put_quota(inode->i_mapping, chg);
    + return ERR_PTR(-VM_FAULT_SIGBUS);
    + }
    spin_lock(&hugetlb_lock);
    page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve);
    spin_unlock(&hugetlb_lock);
    @@ -1046,6 +1060,9 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
    if (!page) {
    page = alloc_buddy_huge_page(h, NUMA_NO_NODE);
    if (!page) {
    + mem_cgroup_hugetlb_uncharge_memcg(idx,
    + pages_per_huge_page(h),
    + memcg);
    hugetlb_put_quota(inode->i_mapping, chg);
    return ERR_PTR(-VM_FAULT_SIGBUS);
    }
    @@ -1054,7 +1071,9 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
    set_page_private(page, (unsigned long) mapping);

    vma_commit_reservation(h, vma, addr);
    -
    + /* update page cgroup details */
    + mem_cgroup_hugetlb_commit_charge(idx, pages_per_huge_page(h),
    + memcg, page);
    return page;
    }

    diff --git a/mm/memcontrol.c b/mm/memcontrol.c
    index 8cac77b..f4aa11c 100644
    --- a/mm/memcontrol.c
    +++ b/mm/memcontrol.c
    @@ -2901,6 +2901,11 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype)

    if (PageSwapCache(page))
    return NULL;
    + /*
    + * HugeTLB page uncharge happen in the HugeTLB compound page destructor
    + */
    + if (PageHuge(page))
    + return NULL;

    if (PageTransHuge(page)) {
    nr_pages <<= compound_order(page);
    --
    1.7.9


    \
     
     \ /
      Last update: 2012-03-13 08:11    [W:0.023 / U:61.008 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site