Re: [PATCH 20/33] readahead: initial method - expected read size

[Andrew Morton]

Wu Fengguang <wfg@xxxxxxxxxxxxxxxx> wrote:
>
> backing_dev_info.ra_expect_bytes is dynamicly updated to be the expected
> read pages on start-of-file. It allows the initial readahead to be more
> aggressive and hence efficient.
> 
> 
> +void fastcall readahead_close(struct file *file)

eww, fastcall.

> +{
> +	struct inode *inode = file->f_dentry->d_inode;
> +	struct address_space *mapping = inode->i_mapping;
> +	struct backing_dev_info *bdi = mapping->backing_dev_info;
> +	unsigned long pos = file->f_pos;

f_pos is loff_t.

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