tools/vm/page-types.c: support swap entry
/proc/pid/pagemap (pte_to_pagemap_entry() internally) already reports about swap entry, so let's make the in-kernel utility aware of it. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -61,6 +61,8 @@
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#define PM_PFRAME_BITS 55
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#define PM_PFRAME_MASK ((1LL << PM_PFRAME_BITS) - 1)
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#define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
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#define MAX_SWAPFILES_SHIFT 5
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#define PM_SWAP_OFFSET(x) (((x) & PM_PFRAME_MASK) >> MAX_SWAPFILES_SHIFT)
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#define PM_SOFT_DIRTY (1ULL << 55)
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#define PM_MMAP_EXCLUSIVE (1ULL << 56)
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#define PM_FILE (1ULL << 61)
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@ -92,7 +94,8 @@
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#define KPF_SLOB_FREE 49
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#define KPF_SLUB_FROZEN 50
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#define KPF_SLUB_DEBUG 51
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#define KPF_FILE 62
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#define KPF_FILE 61
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#define KPF_SWAP 62
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#define KPF_MMAP_EXCLUSIVE 63
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#define KPF_ALL_BITS ((uint64_t)~0ULL)
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@ -146,6 +149,7 @@ static const char * const page_flag_names[] = {
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[KPF_SLUB_DEBUG] = "E:slub_debug",
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[KPF_FILE] = "F:file",
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[KPF_SWAP] = "w:swap",
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[KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive",
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};
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@ -297,6 +301,10 @@ static unsigned long pagemap_pfn(uint64_t val)
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return pfn;
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}
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static unsigned long pagemap_swap_offset(uint64_t val)
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{
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return val & PM_SWAP ? PM_SWAP_OFFSET(val) : 0;
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}
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/*
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* page flag names
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@ -452,6 +460,8 @@ static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme)
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flags |= BIT(SOFTDIRTY);
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if (pme & PM_FILE)
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flags |= BIT(FILE);
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if (pme & PM_SWAP)
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flags |= BIT(SWAP);
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if (pme & PM_MMAP_EXCLUSIVE)
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flags |= BIT(MMAP_EXCLUSIVE);
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@ -613,6 +623,22 @@ static void walk_pfn(unsigned long voffset,
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}
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}
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static void walk_swap(unsigned long voffset, uint64_t pme)
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{
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uint64_t flags = kpageflags_flags(0, pme);
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if (!bit_mask_ok(flags))
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return;
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if (opt_list == 1)
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show_page_range(voffset, pagemap_swap_offset(pme), 1, flags);
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else if (opt_list == 2)
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show_page(voffset, pagemap_swap_offset(pme), flags);
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nr_pages[hash_slot(flags)]++;
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total_pages++;
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}
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#define PAGEMAP_BATCH (64 << 10)
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static void walk_vma(unsigned long index, unsigned long count)
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{
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@ -632,6 +658,8 @@ static void walk_vma(unsigned long index, unsigned long count)
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pfn = pagemap_pfn(buf[i]);
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if (pfn)
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walk_pfn(index + i, pfn, 1, buf[i]);
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if (buf[i] & PM_SWAP)
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walk_swap(index + i, buf[i]);
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}
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index += pages;
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