Messages in this thread Patch in this message | | | From | "Wang, Yalin" <> | Date | Fri, 30 Jan 2015 14:14:30 +0800 | Subject | [RFC] mm:change /proc/smaps caculation behavior |
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This patch change smaps pagetable walk behavior, to make sure not skip VM_PFNMAP pagetables, so that we can calculate COW pages of VM_PFNMAP as normal pages.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com> --- fs/proc/task_mmu.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index c7267e9..00a5b73 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -503,6 +503,15 @@ static void smaps_pte_entry(pte_t *pte, unsigned long addr, smaps_account(mss, page, PAGE_SIZE, pte_young(*pte), pte_dirty(*pte)); } +static int smaps_test_walk(unsigned long addr, unsigned long next, + struct mm_walk *walk) +{ + /* + * don't skip VM_PFNMAP, so that we can caculate some COW pages. + */ + return 0; +} + #ifdef CONFIG_TRANSPARENT_HUGEPAGE static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr, struct mm_walk *walk) @@ -616,6 +625,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) struct mem_size_stats mss; struct mm_walk smaps_walk = { .pmd_entry = smaps_pte_range, + .test_walk = smaps_test_walk, .mm = vma->vm_mm, .private = &mss, }; -- 2.2.2
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