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author | Dave Hansen <dave@linux.vnet.ibm.com> | 2011-09-21 00:19:38 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-09-21 22:15:44 +0200 |
commit | eb4866d0066ffd5446751c102d64feb3318d8bd1 (patch) | |
tree | a40325308b621362938facb01b729882098e9cc2 /fs/proc/task_mmu.c | |
parent | Merge branch 'fixes' of git://git.linaro.org/people/arnd/arm-soc (diff) | |
download | linux-eb4866d0066ffd5446751c102d64feb3318d8bd1.tar.xz linux-eb4866d0066ffd5446751c102d64feb3318d8bd1.zip |
make /proc/$pid/numa_maps gather_stats() take variable page size
We need to teach the numa_maps code about transparent huge pages. The
first step is to teach gather_stats() that the pte it is dealing with
might represent more than one page.
Note that will we use this in a moment for transparent huge pages since
they have use a single pmd_t which _acts_ as a "surrogate" for a bunch
of smaller pte_t's.
I'm a _bit_ unhappy that this interface counts in hugetlbfs page sizes
for hugetlbfs pages and PAGE_SIZE for normal pages. That means that to
figure out how many _bytes_ "dirty=1" means, you must first know the
hugetlbfs page size. That's easier said than done especially if you
don't have visibility in to the mount.
But, that's probably a discussion for another day especially since it
would change behavior to fix it. But, just in case anyone wonders why
this patch only passes a '1' in the hugetlb case...
Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
-rw-r--r-- | fs/proc/task_mmu.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 25b6a887adb9..61342a454bd9 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -877,30 +877,31 @@ struct numa_maps_private { struct numa_maps md; }; -static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty) +static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty, + unsigned long nr_pages) { int count = page_mapcount(page); - md->pages++; + md->pages += nr_pages; if (pte_dirty || PageDirty(page)) - md->dirty++; + md->dirty += nr_pages; if (PageSwapCache(page)) - md->swapcache++; + md->swapcache += nr_pages; if (PageActive(page) || PageUnevictable(page)) - md->active++; + md->active += nr_pages; if (PageWriteback(page)) - md->writeback++; + md->writeback += nr_pages; if (PageAnon(page)) - md->anon++; + md->anon += nr_pages; if (count > md->mapcount_max) md->mapcount_max = count; - md->node[page_to_nid(page)]++; + md->node[page_to_nid(page)] += nr_pages; } static int gather_pte_stats(pmd_t *pmd, unsigned long addr, @@ -931,7 +932,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr, if (!node_isset(nid, node_states[N_HIGH_MEMORY])) continue; - gather_stats(page, md, pte_dirty(*pte)); + gather_stats(page, md, pte_dirty(*pte), 1); } while (pte++, addr += PAGE_SIZE, addr != end); pte_unmap_unlock(orig_pte, ptl); @@ -952,7 +953,7 @@ static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, return 0; md = walk->private; - gather_stats(page, md, pte_dirty(*pte)); + gather_stats(page, md, pte_dirty(*pte), 1); return 0; } |