Messages in this thread Patch in this message | | | From | Pankaj Raghav <> | Subject | [RFC 13/23] readahead: set file_ra_state->ra_pages to be at least mapping_min_order | Date | Fri, 15 Sep 2023 20:38:38 +0200 |
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From: Luis Chamberlain <mcgrof@kernel.org>
Set the file_ra_state->ra_pages in file_ra_state_init() to be at least mapping_min_order of pages if the bdi->ra_pages is less than that.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> --- mm/readahead.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/readahead.c b/mm/readahead.c index ef3b23a41973..5c4e7ee64dc1 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -138,7 +138,13 @@ void file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping) { + unsigned int order = mapping_min_folio_order(mapping); + unsigned int min_nrpages = 1U << order; + unsigned int max_pages = inode_to_bdi(mapping->host)->io_pages; + ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages; + if (ra->ra_pages < min_nrpages && min_nrpages < max_pages) + ra->ra_pages = min_nrpages; ra->prev_pos = -1; } EXPORT_SYMBOL_GPL(file_ra_state_init); -- 2.40.1
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