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authorJan Kara <jack@suse.cz>2017-11-15 17:34:33 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:03 -0800
commit72b045aecdd856b083521f2a963705b4c2e59680 (patch)
tree586bdb2ee2ed3322084e10355b02e4e9c8fd622a /mm/swap.c
parent6b4c54e3787bc03e810062bd257a3b05fd9c72d6 (diff)
mm: implement find_get_pages_range_tag()
Patch series "Ranged pagevec tagged lookup", v3. In this series I provide a ranged variant of pagevec_lookup_tag() and use it in places where it makes sense. This series removes some common code and it also has a potential for speeding up some operations similarly as for pagevec_lookup_range() (but for now I can think of only artificial cases where this happens). This patch (of 16): Implement a variant of find_get_pages_tag() that stops iterating at given index. Lots of users of this function (through pagevec_lookup()) actually want a range lookup and all of them are currently open-coding this. Also create corresponding pagevec_lookup_range_tag() function. Link: http://lkml.kernel.org/r/20171009151359.31984-2-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Chao Yu <yuchao0@huawei.com> Cc: David Howells <dhowells@redhat.com> Cc: David Sterba <dsterba@suse.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Steve French <sfrench@samba.org> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
-rw-r--r--mm/swap.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/mm/swap.c b/mm/swap.c
index a77d68f2c1b6..e1c74eb8a775 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -986,14 +986,15 @@ unsigned pagevec_lookup_range(struct pagevec *pvec,
}
EXPORT_SYMBOL(pagevec_lookup_range);
-unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping,
- pgoff_t *index, int tag, unsigned nr_pages)
+unsigned pagevec_lookup_range_tag(struct pagevec *pvec,
+ struct address_space *mapping, pgoff_t *index, pgoff_t end,
+ int tag, unsigned nr_pages)
{
- pvec->nr = find_get_pages_tag(mapping, index, tag,
+ pvec->nr = find_get_pages_range_tag(mapping, index, end, tag,
nr_pages, pvec->pages);
return pagevec_count(pvec);
}
-EXPORT_SYMBOL(pagevec_lookup_tag);
+EXPORT_SYMBOL(pagevec_lookup_range_tag);
/*
* Perform any setup for the swap system