On Thu, Jan 05, 2006 at 01:18:57PM -0800, Linus Torvalds wrote:
OK, I can trash a few tapes again now.
> ---
> diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
> index c4aade8..18e60e1 100644
> --- a/drivers/scsi/st.c
> +++ b/drivers/scsi/st.c
> @@ -4481,6 +4481,7 @@ static int sgl_unmap_user_pages(struct s
> for (i=0; i < nr_pages; i++) {
> struct page *page = sgl[i].page;
>
> + sgl[i].page = NULL;
> if (dirtied)
> SetPageDirty(page);
> /* FIXME: cache flush missing for rw==READ
This hunk fails on 2.6.15+Kai's patch. There's already a
sgl[i].page = NULL;
in there - here's what my copy of the function looks like:
/* And unmap them... */
static int sgl_unmap_user_pages(struct scatterlist *sgl, const unsigned int nr_pages,
int dirtied)
{
int i;
static int ctr;
if ((ctr++ % 10000) == 0)
prt_pages(sgl, nr_pages, "before");
for (i=0; i < nr_pages; i++) {
struct page *page = sgl[i].page;
if (!page) {
printk("st: trying double free: %d %d\n", i, nr_pages);
continue;
}
if (dirtied)
SetPageDirty(page);
/* FIXME: cache flush missing for rw==READ
* FIXME: call the correct reference counting function
*/
page_cache_release(page);
sgl[i].page = NULL;
}
return 0;
}
I left it like that.
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index a06a84d..daf504d 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -299,6 +299,7 @@ struct page {
> #define put_page_testzero(p) \
> ({ \
> BUG_ON(page_count(p) == 0); \
> + BUG_ON(page_count(p) <= page_mapcount(p)); \
> atomic_add_negative(-1, &(p)->_count); \
> })
>
The first backup run with this patch didn't crash - that's the first
time with 2.6.15. I wonder if it's a coincidence. Nothing else has
changed, AFAICS, but the kernel output is different (or there's more of
it):
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933526
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933496
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933498
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933499
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933500
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933501
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933525
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933523
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007909
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963403
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:992653
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963620
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:985187
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:966121
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1007992
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933594
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933522
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963590
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:931906
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933763
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963777
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933718
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963619
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:207313
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933522
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963590
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:931906
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933763
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963777
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933718
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963619
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:207313
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933606
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933323
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:963420
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:959854
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962968
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933602
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933600
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:933339
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
st: page attributes before page_release 8
0: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1009784
1: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:186937
2: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:1008366
3: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:968112
4: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962986
5: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932668
6: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:932637
7: flags:0x010000000000006c mapping:ffff81000c354278 mapcount:2 count:4 pfn:962435
There are 48 of those, not quite the same as the number of filesystems
written to tape (58).
I'll run a few more tonight.
-ryan
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