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Date: Thu, 16 Apr 2009 09:53:03 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: balbir@...ux.vnet.ibm.com
Cc: "linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Add file based RSS accounting for memory resource
controller (v2)
On Wed, 15 Apr 2009 17:35:10 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> +void mem_cgroup_update_mapped_file_stat(struct page *page, struct mm_struct *mm,
> + int val)
> +{
> + struct mem_cgroup *mem;
> + struct mem_cgroup_stat *stat;
> + struct mem_cgroup_stat_cpu *cpustat;
> + int cpu = get_cpu();
> +
> + if (!page_is_file_cache(page))
> + return;
> +
> + if (unlikely(!mm))
> + mm = &init_mm;
> +
> + mem = try_get_mem_cgroup_from_mm(mm);
> + if (!mem)
> + return;
> +
> + stat = &mem->stat;
> + cpustat = &stat->cpustat[cpu];
> +
> + __mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE, val);
> +}
>
put_cpu() is necessary.
> /*
> * Call callback function against all cgroup under hierarchy tree.
> @@ -1096,6 +1124,9 @@ static int mem_cgroup_move_account(struct page_cgroup *pc,
> struct mem_cgroup_per_zone *from_mz, *to_mz;
> int nid, zid;
> int ret = -EBUSY;
> + struct mem_cgroup_stat *stat;
> + struct mem_cgroup_stat_cpu *cpustat;
> + int cpu;
>
> VM_BUG_ON(from == to);
> VM_BUG_ON(PageLRU(pc->page));
> @@ -1116,6 +1147,18 @@ static int mem_cgroup_move_account(struct page_cgroup *pc,
>
> res_counter_uncharge(&from->res, PAGE_SIZE);
> mem_cgroup_charge_statistics(from, pc, false);
> +
> + cpu = get_cpu();
> + /* Update mapped_file data for mem_cgroup "from" */
> + stat = &from->stat;
> + cpustat = &stat->cpustat[cpu];
> + __mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE, -1);
> +
> + /* Update mapped_file data for mem_cgroup "to" */
> + stat = &to->stat;
> + cpustat = &stat->cpustat[cpu];
> + __mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE, 1);
> +
here, too.
Seems no troubles in other parts.
Regards,
-Kame
> if (do_swap_account)
> res_counter_uncharge(&from->memsw, PAGE_SIZE);
> css_put(&from->css);
> @@ -2051,6 +2094,7 @@ static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
> enum {
> MCS_CACHE,
> MCS_RSS,
> + MCS_MAPPED_FILE,
> MCS_PGPGIN,
> MCS_PGPGOUT,
> MCS_INACTIVE_ANON,
> @@ -2071,6 +2115,7 @@ struct {
> } memcg_stat_strings[NR_MCS_STAT] = {
> {"cache", "total_cache"},
> {"rss", "total_rss"},
> + {"mapped_file", "total_mapped_file"},
> {"pgpgin", "total_pgpgin"},
> {"pgpgout", "total_pgpgout"},
> {"inactive_anon", "total_inactive_anon"},
> @@ -2091,6 +2136,8 @@ static int mem_cgroup_get_local_stat(struct mem_cgroup *mem, void *data)
> s->stat[MCS_CACHE] += val * PAGE_SIZE;
> val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
> s->stat[MCS_RSS] += val * PAGE_SIZE;
> + val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_MAPPED_FILE);
> + s->stat[MCS_MAPPED_FILE] += val * PAGE_SIZE;
> val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGIN_COUNT);
> s->stat[MCS_PGPGIN] += val;
> val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGOUT_COUNT);
> diff --git a/mm/memory.c b/mm/memory.c
> index a715b19..95a9ded 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -822,7 +822,7 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
> mark_page_accessed(page);
> file_rss--;
> }
> - page_remove_rmap(page);
> + page_remove_rmap(page, vma);
> if (unlikely(page_mapcount(page) < 0))
> print_bad_pte(vma, addr, ptent, page);
> tlb_remove_page(tlb, page);
> @@ -1421,7 +1421,7 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
> /* Ok, finally just insert the thing.. */
> get_page(page);
> inc_mm_counter(mm, file_rss);
> - page_add_file_rmap(page);
> + page_add_file_rmap(page, vma);
> set_pte_at(mm, addr, pte, mk_pte(page, prot));
>
> retval = 0;
> @@ -2080,7 +2080,7 @@ gotten:
> * mapcount is visible. So transitively, TLBs to
> * old page will be flushed before it can be reused.
> */
> - page_remove_rmap(old_page);
> + page_remove_rmap(old_page, vma);
> }
>
> /* Free the old page.. */
> @@ -2718,7 +2718,7 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
> page_add_new_anon_rmap(page, vma, address);
> } else {
> inc_mm_counter(mm, file_rss);
> - page_add_file_rmap(page);
> + page_add_file_rmap(page, vma);
> if (flags & FAULT_FLAG_WRITE) {
> dirty_page = page;
> get_page(dirty_page);
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 068655d..098d365 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -131,7 +131,7 @@ static void remove_migration_pte(struct vm_area_struct *vma,
> if (PageAnon(new))
> page_add_anon_rmap(new, vma, addr);
> else
> - page_add_file_rmap(new);
> + page_add_file_rmap(new, vma);
>
> /* No need to invalidate - it was non-present before */
> update_mmu_cache(vma, addr, pte);
> diff --git a/mm/rmap.c b/mm/rmap.c
> index 1652166..3e29864 100644
> --- a/mm/rmap.c
> +++ b/mm/rmap.c
> @@ -686,10 +686,12 @@ void page_add_new_anon_rmap(struct page *page,
> *
> * The caller needs to hold the pte lock.
> */
> -void page_add_file_rmap(struct page *page)
> +void page_add_file_rmap(struct page *page, struct vm_area_struct *vma)
> {
> - if (atomic_inc_and_test(&page->_mapcount))
> + if (atomic_inc_and_test(&page->_mapcount)) {
> __inc_zone_page_state(page, NR_FILE_MAPPED);
> + mem_cgroup_update_mapped_file_stat(page, vma->vm_mm, 1);
> + }
> }
>
> #ifdef CONFIG_DEBUG_VM
> @@ -719,7 +721,7 @@ void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long
> *
> * The caller needs to hold the pte lock.
> */
> -void page_remove_rmap(struct page *page)
> +void page_remove_rmap(struct page *page, struct vm_area_struct *vma)
> {
> if (atomic_add_negative(-1, &page->_mapcount)) {
> /*
> @@ -738,6 +740,7 @@ void page_remove_rmap(struct page *page)
> mem_cgroup_uncharge_page(page);
> __dec_zone_page_state(page,
> PageAnon(page) ? NR_ANON_PAGES : NR_FILE_MAPPED);
> + mem_cgroup_update_mapped_file_stat(page, vma->vm_mm, -1);
> /*
> * It would be tidy to reset the PageAnon mapping here,
> * but that might overwrite a racing page_add_anon_rmap
> @@ -835,7 +838,7 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
> dec_mm_counter(mm, file_rss);
>
>
> - page_remove_rmap(page);
> + page_remove_rmap(page, vma);
> page_cache_release(page);
>
> out_unmap:
> @@ -950,7 +953,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount,
> if (pte_dirty(pteval))
> set_page_dirty(page);
>
> - page_remove_rmap(page);
> + page_remove_rmap(page, vma);
> page_cache_release(page);
> dec_mm_counter(mm, file_rss);
> (*mapcount)--;
>
> --
> Balbir
> --
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