#include <asm/uaccess.h>
#include <asm/pgtable.h>
+#include "internal.h"
+
#define BLOCKS_PER_PAGE (PAGE_CACHE_SIZE/512)
#define VM_ACCT(size) (PAGE_CACHE_ALIGN(size) >> PAGE_SHIFT)
struct inode *inode = dentry->d_inode;
struct shmem_inode_info *info = SHMEM_I(inode);
- spin_lock(&info->lock);
- shmem_recalc_inode(inode);
- spin_unlock(&info->lock);
-
+ if (info->alloced - info->swapped != inode->i_mapping->nrpages) {
+ spin_lock(&info->lock);
+ shmem_recalc_inode(inode);
+ spin_unlock(&info->lock);
+ }
generic_fillattr(inode, stat);
-
return 0;
}
}
if (newsize <= oldsize) {
loff_t holebegin = round_up(newsize, PAGE_SIZE);
- unmap_mapping_range(inode->i_mapping, holebegin, 0, 1);
- shmem_truncate_range(inode, newsize, (loff_t)-1);
+ if (oldsize > holebegin)
+ unmap_mapping_range(inode->i_mapping,
+ holebegin, 0, 1);
+ if (info->alloced)
+ shmem_truncate_range(inode,
+ newsize, (loff_t)-1);
/* unmap again to remove racily COWed private pages */
- unmap_mapping_range(inode->i_mapping, holebegin, 0, 1);
+ if (oldsize > holebegin)
+ unmap_mapping_range(inode->i_mapping,
+ holebegin, 0, 1);
}
}
*/
oldpage = newpage;
} else {
- mem_cgroup_migrate(oldpage, newpage, true);
+ mem_cgroup_replace_page(oldpage, newpage);
lru_cache_add_anon(newpage);
*pagep = newpage;
}