Re: problem with crash on upstream kernel cores

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Josef Whiter wrote:

> On Fri, Feb 23, 2007 at 04:00:09PM -0500, Dave Anderson wrote:
> > if you do this with your kernel:
> >
> >   # gdb vmlinux
> >   ...
> >   (gdb) ptype struct zone
> >
> > What do you see?
> >
>
> (gdb) ptype struct zone
> type = struct zone {
>     long unsigned int pages_min;
>     long unsigned int pages_low;
>     long unsigned int pages_high;
>     long unsigned int lowmem_reserve[3];
>     struct per_cpu_pageset pageset[32];
>     spinlock_t lock;
>     struct free_area free_area[11];
>     struct zone_padding _pad1_;
>     spinlock_t lru_lock;
>     struct list_head active_list;
>     struct list_head inactive_list;
>     long unsigned int nr_scan_active;
>     long unsigned int nr_scan_inactive;
>     long unsigned int pages_scanned;
>     int all_unreclaimable;
>     atomic_t reclaim_in_progress;
>     atomic_long_t vm_stat[14];
>     int prev_priority;
>     struct zone_padding _pad2_;
>     wait_queue_head_t *wait_table;
>     long unsigned int wait_table_hash_nr_entries;
>     long unsigned int wait_table_bits;
>     struct pglist_data *zone_pgdat;
>     long unsigned int zone_start_pfn;
>     long unsigned int spanned_pages;
>     long unsigned int present_pages;
>     const char *name;
> }
>
> It looks like free_pages has been removed altogether.

That appears to be a very recent change -- 2.6.20.1 still has it:

struct zone {
        /* Fields commonly accessed by the page allocator */
        unsigned long           free_pages;
        unsigned long           pages_min, pages_low, pages_high;
        ...

What version are you using?  Are you running 2.6.21-rc1?

Dave






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