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Subject[PATCH] fadvise volatile fixes from Dmitry
On 03/16/2012 03:51 PM, John Stultz wrote:
> This patch provides new fadvise flags that can be used to mark
> file pages as volatile, which will allow it to be discarded if the
> kernel wants to reclaim memory.
Right after sending this I realized I had forgotten to include
some fixes for issues Dmitry pointed out. So I've included them
here.

Signed-off-by: John Stultz<john.stultz@linaro.org>
---
mm/volatile.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/volatile.c b/mm/volatile.c
index e412a8b..f40c02e 100644
--- a/mm/volatile.c
+++ b/mm/volatile.c
@@ -220,11 +220,12 @@ long mapping_range_nonvolatile(struct address_space *mapping,
new->mapping = mapping;
new->range_node.start = end + 1;
new->range_node.end = node->end;
- volatile_range_resize(vrange, node->start, start-1);
+ new->purged = vrange->purged;
range_tree_add(&mapping->volatile_root,
&new->range_node);
if (range_on_lru(new))
lru_add(new);
+ volatile_range_resize(vrange, node->start, start-1);

break;
}
@@ -263,7 +264,7 @@ void mapping_clear_volatile_ranges(struct address_space *mapping)
static int volatile_shrink(struct shrinker *ignored, struct shrink_control *sc)
{
struct volatile_range *range, *next;
- unsigned long nr_to_scan = sc->nr_to_scan;
+ s64 nr_to_scan = sc->nr_to_scan;
const gfp_t gfp_mask = sc->gfp_mask;

if (nr_to_scan&& !(gfp_mask& __GFP_FS))
--
1.7.3.2.146.gca209




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