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    SubjectRe: [03/14] vmallocinfo: Support display of vcompound for a virtual compound page
    Christoph Lameter a écrit :
    > Add another flag to the vmalloc subsystem to mark virtual compound pages.
    >
    > Signed-off-by: Christoph Lameter <clameter@sgi.com>
    >
    > ---
    > include/linux/vmalloc.h | 1 +
    > mm/vmalloc.c | 3 +++
    > 2 files changed, 4 insertions(+)
    >
    > Index: linux-2.6.25-rc5-mm1/include/linux/vmalloc.h
    > ===================================================================
    > --- linux-2.6.25-rc5-mm1.orig/include/linux/vmalloc.h 2008-03-19 18:17:42.093443900 -0700
    > +++ linux-2.6.25-rc5-mm1/include/linux/vmalloc.h 2008-03-19 18:27:20.150422445 -0700
    > @@ -12,6 +12,7 @@ struct vm_area_struct;
    > #define VM_MAP 0x00000004 /* vmap()ed pages */
    > #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
    > #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
    > +#define VM_VCOMPOUND 0x00000020 /* Page allocator fallback */
    > /* bits [20..32] reserved for arch specific ioremap internals */
    >
    > /*
    > Index: linux-2.6.25-rc5-mm1/mm/vmalloc.c
    > ===================================================================
    > --- linux-2.6.25-rc5-mm1.orig/mm/vmalloc.c 2008-03-19 18:18:02.689633934 -0700
    > +++ linux-2.6.25-rc5-mm1/mm/vmalloc.c 2008-03-19 18:27:20.150422445 -0700
    > @@ -974,6 +974,9 @@ static int s_show(struct seq_file *m, vo
    > if (v->flags & VM_VPAGES)
    > seq_printf(m, " vpages");
    >
    > + if (v->flags & VM_VCOMPOUND)
    > + seq_printf(m, " vcompound");
    > +
    > seq_putc(m, '\n');
    > return 0;
    > }
    >

    I would love to see NUMA information as well on vmallocinfo, but have
    currently no available time to prepare a patch.

    Counters with numbers of pages per node would be great.

    (like in /proc/pid/numa_maps)

    N0=2 N1=2 N2=2 N3=2


    This way we could check hashdist is working or not, since it depends on
    various numa policies :)

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