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From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
	Daniel Jordan <daniel.m.jordan@oracle.com>,
	Jan Kara <jack@suse.cz>
Subject: [PATCH 12/16] mm: Add variant of pagevec_lookup_range_tag() taking number of pages
Date: Mon,  9 Oct 2017 17:13:55 +0200	[thread overview]
Message-ID: <20171009151359.31984-13-jack@suse.cz> (raw)
In-Reply-To: <20171009151359.31984-1-jack@suse.cz>

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().

Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
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 e1c74eb8a775..6c50fec2da92 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_nr_tag);
 /*
  * Perform any setup for the swap system
  */
-- 
2.12.3

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WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	Daniel Jordan <daniel.m.jordan@oracle.com>,
	Jan Kara <jack@suse.cz>
Subject: [PATCH 12/16] mm: Add variant of pagevec_lookup_range_tag() taking number of pages
Date: Mon,  9 Oct 2017 17:13:55 +0200	[thread overview]
Message-ID: <20171009151359.31984-13-jack@suse.cz> (raw)
In-Reply-To: <20171009151359.31984-1-jack@suse.cz>

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().

Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
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 e1c74eb8a775..6c50fec2da92 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_nr_tag);
 /*
  * Perform any setup for the swap system
  */
-- 
2.12.3

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
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  parent reply	other threads:[~2017-10-09 15:13 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-09 15:13 [PATCH 0/16 v3] Ranged pagevec tagged lookup Jan Kara
2017-10-09 15:13 ` Jan Kara
2017-10-09 15:13 ` [PATCH 01/16] mm: Implement find_get_pages_range_tag() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 02/16] btrfs: Use pagevec_lookup_range_tag() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 03/16] ceph: " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 04/16] ext4: " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 05/16] f2fs: " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 06/16] f2fs: Simplify page iteration loops Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 07/16] f2fs: Use find_get_pages_tag() for looking up single page Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 08/16] gfs2: Use pagevec_lookup_range_tag() Jan Kara
2017-10-09 15:13   ` [Cluster-devel] " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 09/16] nilfs2: " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 10/16] mm: Use pagevec_lookup_range_tag() in __filemap_fdatawait_range() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 11/16] mm: Use pagevec_lookup_range_tag() in write_cache_pages() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` Jan Kara [this message]
2017-10-09 15:13   ` [PATCH 12/16] mm: Add variant of pagevec_lookup_range_tag() taking number of pages Jan Kara
2017-10-09 15:13 ` [PATCH 13/16] ceph: Use pagevec_lookup_range_nr_tag() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 14/16] mm: Remove nr_pages argument from pagevec_lookup_{,range}_tag() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 15/16] afs: Use find_get_pages_range_tag() Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-09 15:13 ` [PATCH 16/16] cifs: " Jan Kara
2017-10-09 15:13   ` Jan Kara
2017-10-10 17:48   ` Daniel Jordan

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