@@ -889,18 +889,22 @@ struct fown_struct {
int signum; /* posix.1b rt signal to be delivered on IO */
};
-/*
- * Track a single file's readahead state
+/**
+ * struct file_ra_state - Track a file's readahead state.
+ * @start: Where the most recent readahead started.
+ * @size: Number of pages read in the most recent readahead.
+ * @async_size: Start next readahead when this many pages are left.
+ * @ra_pages: Maximum size of a readahead request.
+ * @mmap_miss: How many mmap accesses missed in the page cache.
+ * @prev_pos: The last byte in the most recent read request.
*/
struct file_ra_state {
- pgoff_t start; /* where readahead started */
- unsigned int size; /* # of readahead pages */
- unsigned int async_size; /* do asynchronous readahead when
- there are only # of pages ahead */
-
- unsigned int ra_pages; /* Maximum readahead window */
- unsigned int mmap_miss; /* Cache miss stat for mmap accesses */
- loff_t prev_pos; /* Cache last read() position */
+ pgoff_t start;
+ unsigned int size;
+ unsigned int async_size;
+ unsigned int ra_pages;
+ unsigned int mmap_miss;
+ loff_t prev_pos;
};
/*
Turn the comments into kernel-doc and improve the wording slightly. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/fs.h | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-)