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    Annotation of /trunk/kernel26-xen/patches-2.6.25-r1/1070-2.6.25-xen-Debug-dump-pgtables-on-make_page_readonly.patch

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    Revision 606 - (hide annotations) (download)
    Thu May 22 23:13:13 2008 UTC (16 years, 1 month ago) by niro
    File size: 2482 byte(s) 
    -ver bump to 2.6.25-magellan-r1:
- linux-2.6.25.4
- fbcondecor-0.9.4
- squashfs-3.3
- unionfs-2.3.3
- tuxonice-3.0-rc7
- linux-phc-0.3.0
- acpi-dstd-0.9a
- reiser4
- xen-3.2.0
. ipw3945-1.2.2
    1 niro 606 From bcd3f4ae6009563081166e6559eb9181d673d370 Mon Sep 17 00:00:00 2001
    2     From: Eduardo Habkost <ehabkost@redhat.com>
    3     Date: Tue, 18 Dec 2007 12:34:36 -0200
    4     Subject: [PATCH] Debug: dump pgtables on make_page_readonly()
    5    
    6     Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
    7     ---
    8     arch/x86/mm/init_64.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++
    9     1 files changed, 68 insertions(+), 0 deletions(-)
    10    
    11     diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
    12     index cf1453b..fddf208 100644
    13     --- a/arch/x86/mm/init_64.c
    14     +++ b/arch/x86/mm/init_64.c
    15     @@ -72,6 +72,71 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
    16    
    17     #ifdef CONFIG_XEN
    18    
    19     +//#define vvva(p) ((void*)((p) + __START_KERNEL_map))
    20     +#define vvva(p) __va((p))
    21     +
    22     +void show_pgtable1(pte_t *tbl, unsigned long addr)
    23     +{
    24     + pte_t *pte = tbl + pte_index(addr);
    25     + pte_val_t pv;
    26     + unsigned long *page;
    27     +
    28     + xprintk("\npte: %p\n", pte);
    29     + xprintk("\npte val: %lx\n", pte->pte);
    30     +
    31     + pv = pte_val(*pte);
    32     + if (!(pv & _PAGE_PRESENT))
    33     + return;
    34     +
    35     + page = vvva(pv & PHYSICAL_PAGE_MASK);
    36     +
    37     + xprintk("\npage: %p\n", page);
    38     + xprintk("\npage val: %lx\n", *page);
    39     +}
    40     +
    41     +void show_pgtable2(pmd_t *tbl, unsigned long addr)
    42     +{
    43     + pmd_t *pmd = tbl + pmd_index(addr);
    44     + pmd_val_t pv;
    45     +
    46     + xprintk("\npmd: %p\n", pmd);
    47     + xprintk("\npmd val: %lx\n", pmd->pmd);
    48     +
    49     + pv = pmd_val(*pmd);
    50     + if (!(pv & _PAGE_PRESENT))
    51     + return;
    52     +
    53     + show_pgtable1((pte_t*)vvva(pv & PHYSICAL_PAGE_MASK), addr);
    54     +}
    55     +
    56     +void show_pgtable3(pud_t *tbl, unsigned long addr)
    57     +{
    58     + pud_t *pud = tbl + pud_index(addr);
    59     +
    60     + xprintk("\npud: %p\n", pud);
    61     + xprintk("pud value: %lx\n", pud->pud);
    62     +
    63     + show_pgtable2((pmd_t*)vvva(pud_val(*pud) & PHYSICAL_PAGE_MASK), addr);
    64     +}
    65     +
    66     +void show_pgtable4(pgd_t *tbl, unsigned long addr)
    67     +{
    68     + pgd_t *pgd = tbl + pgd_index(addr);
    69     +
    70     + xprintk("\npgd: %p\n", pgd);
    71     + xprintk("pgd value: %lx\n", pgd->pgd);
    72     +
    73     + show_pgtable3((pud_t*)vvva(pgd_val(*pgd) & PHYSICAL_PAGE_MASK), addr);
    74     +}
    75     +
    76     +void show_pgtable(unsigned long addr)
    77     +{
    78     + xprintk("\nshowing pgtable for %lx\n", addr);
    79     +
    80     + show_pgtable4(init_level4_pgt, addr);
    81     +}
    82     +
    83     +
    84     static void __make_page_readonly(void *va)
    85     {
    86     pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t pte, *ptep;
    87     @@ -92,6 +157,9 @@ static void __make_page_readonly(void *va)
    88    
    89     if ((addr >= VMALLOC_START) && (addr < VMALLOC_END))
    90     __make_page_readonly(__va(pte_pfn(pte) << PAGE_SHIFT));
    91     +
    92     + //show_pgtable(addr);
    93     + //show_pgtable(__START_KERNEL_map + __pa(va));
    94     }
    95    
    96     static void __make_page_writable(void *va)
    97     --
    98     1.5.4.1
    99