On Mon, Oct 29, 2012 at 12:30:47PM +0800, zwu.ker...@gmail.com wrote:
> --- a/mm/readahead.c
> +++ b/mm/readahead.c
> @@ -19,6 +19,7 @@
> #include <linux/pagemap.h>
> #include <linux/syscalls.h>
> #include <linux/file.h>
> +#include <linux/hot_tracking.h>
>
> /*
> * Initialise a struct file's readahead state. Assumes that the caller has
> @@ -138,6 +139,11 @@ static int read_pages(struct address_space *mapping,
> struct file *filp,
> out:
> blk_finish_plug(&plug);
>
> + /* Hot data tracking */
> + hot_update_freqs(mapping->host, (u64)(list_entry(pages->prev,\
> + struct page, lru)->index) << PAGE_CACHE_SHIFT,
> + (u64)nr_pages * PAGE_CACHE_SIZE, 0);
There's a stale \ at the end of the line, and I find this formatting
hard to read. Does the following look acceptable?
hot_update_freqs(mapping->host,
(u64)(list_entry(pages->prev, struct page, lru)->index)
<< PAGE_CACHE_SHIFT,
(u64)nr_pages * PAGE_CACHE_SIZE, 0);
> +
> return ret;
> }
>
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