[PATCH 12/15] mm: Add variant of pagevec_lookup_range_tag() taking number of pages
From: Jan Kara <jack@suse.cz>
Date: 2017-09-27 16:03:31
Also in:
linux-fsdevel
Subsystem:
memory management, memory management - mglru (multi-gen lru), memory management - swap, the rest · Maintainers:
Andrew Morton, Chris Li, Kairui Song, Linus Torvalds
Currently pagevec_lookup_range_tag() takes number of pages to look up but most users don't need this. Create a new function pagevec_lookup_range_nr_tag() that takes maximum number of pages to lookup for Ceph which wants this functionality so that we can drop nr_pages argument from pagevec_lookup_range_tag(). Signed-off-by: Jan Kara <jack@suse.cz> --- include/linux/pagevec.h | 3 +++ mm/swap.c | 9 +++++++++ 2 files changed, 12 insertions(+)
diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
index 371edacc10d5..0281b1d3a91b 100644
--- a/include/linux/pagevec.h
+++ b/include/linux/pagevec.h@@ -40,6 +40,9 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec, unsigned pagevec_lookup_range_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, int tag, unsigned nr_pages); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages); static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, unsigned nr_pages)
diff --git a/mm/swap.c b/mm/swap.c
index a00065f2a8f2..97186da8e5bd 100644
--- a/mm/swap.c
+++ b/mm/swap.c@@ -996,6 +996,15 @@ unsigned pagevec_lookup_range_tag(struct pagevec *pvec, } EXPORT_SYMBOL(pagevec_lookup_range_tag); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages) +{ + pvec->nr = find_get_pages_range_tag(mapping, index, end, tag, + min_t(unsigned int, max_pages, PAGEVEC_SIZE), pvec->pages); + return pagevec_count(pvec); +} +EXPORT_SYMBOL(pagevec_lookup_range_tag); /* * Perform any setup for the swap system */
--
2.12.3
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