diff options
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 93d9ee692fd..0a6fed9d365 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -207,6 +207,8 @@ out: * If page_cache_readahead sees that it is again being called for * a page which it just looked at, it can return immediately without * making any state changes. + * offset: Offset in the prev_page where the last read ended - used for + * detection of sequential file reading. * ahead_start, * ahead_size: Together, these form the "ahead window". * ra_pages: The externally controlled max readahead for this fd. @@ -473,6 +475,7 @@ page_cache_readahead(struct address_space *mapping, struct file_ra_state *ra, /* Note that prev_page == -1 if it is a first read */ sequential = (offset == ra->prev_page + 1); ra->prev_page = offset; + ra->offset = 0; max = get_max_readahead(ra); newsize = min(req_size, max); |