Add hooks when a page is added to page cache.
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
---
mm/filemap.c | 3 +++
mm/hugetlb.c | 3 +++
mm/vmscan.c | 3 +++
3 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 088358c..0e71a04 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -622,6 +622,9 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
void *shadow = NULL;
int ret;
+ if (vm_cache_limit_mbytes && page_cache_over_limit())
+ shrink_page_cache(gfp_mask);
+
__set_page_locked(page);
ret = __add_to_page_cache_locked(page, mapping, offset,
gfp_mask, &shadow);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c82290b..4dc8173 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2851,6 +2851,9 @@ retry:
int err;
struct inode *inode = mapping->host;
+ if (vm_cache_limit_mbytes && page_cache_over_limit())
+ shrink_page_cache(GFP_KERNEL);
+
err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
if (err) {
put_page(page);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ad01ff4..707d3e3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2977,6 +2977,9 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
};
count_vm_event(PAGEOUTRUN);
+ if (vm_cache_limit_mbytes && page_cache_over_limit())
+ shrink_page_cache(GFP_KERNEL);
+
do {
unsigned long lru_pages = 0;
unsigned long nr_attempted = 0;
--
1.6.0.2
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