From: Timofey Titovets <nefelim4ag@gmail.com>
To: linux-btrfs@vger.kernel.org
Cc: Timofey Titovets <nefelim4ag@gmail.com>
Subject: [PATCH v6 1/6] Btrfs: heuristic make use compression workspaces
Date: Thu, 24 Aug 2017 01:45:40 +0300 [thread overview]
Message-ID: <20170823224545.16375-2-nefelim4ag@gmail.com> (raw)
In-Reply-To: <20170823224545.16375-1-nefelim4ag@gmail.com>
Move heuristic to external file
Implement compression workspaces support for
heuristic resources
Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
---
fs/btrfs/heuristic.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/heuristic.c b/fs/btrfs/heuristic.c
index 96ae3e9334bc..d0e9f9112b7e 100644
--- a/fs/btrfs/heuristic.c
+++ b/fs/btrfs/heuristic.c
@@ -48,14 +48,20 @@ static int heuristic(struct list_head *ws, struct inode *inode,
{
struct page *page;
u64 index, index_end;
- u8 *input_data;
index = start >> PAGE_SHIFT;
index_end = end >> PAGE_SHIFT;
+ /*
+ * If end aligned to PAGE_SIZE
+ * It's useless to check +1 PAGE
+ */
+ if(end%PAGE_SIZE == 0)
+ index_end--;
+
for (; index <= index_end; index++) {
page = find_get_page(inode->i_mapping, index);
- input_data = kmap(page);
+ kmap(page);
kunmap(page);
put_page(page);
}
--
2.14.1
next prev parent reply other threads:[~2017-08-23 22:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-23 22:45 [PATCH v6 0/6] Btrfs: populate heuristic with code Timofey Titovets
2017-08-23 22:45 ` Timofey Titovets [this message]
2017-08-23 22:45 ` [PATCH v6 2/6] Btrfs: heuristic workspace add bucket and sample items Timofey Titovets
2017-08-23 22:45 ` [PATCH v6 3/6] Btrfs: implement heuristic sampling logic Timofey Titovets
2017-08-23 22:45 ` [PATCH v6 4/6] Btrfs: heuristic add detection of repeated data patterns Timofey Titovets
2017-08-23 22:45 ` [PATCH v6 5/6] Btrfs: heuristic add byte set calculation Timofey Titovets
2017-08-23 22:45 ` [PATCH v6 6/6] Btrfs: heuristic add byte core " Timofey Titovets
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