Josef Whiter wrote:
> On Fri, Feb 23, 2007 at 04:19:37PM -0500, Dave Anderson wrote:
> > 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?
> >
>
> No, I pulled linus's git tree down maybe a week ago, so its close to -rc1.
>
> Josef
Ok -- it should be easy enough to fix, the free_pages count looks to
have been moved into the zone's embedded vm_stat[] array.
Thanks for reporting this.
Dave
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