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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-11-29 23:03:04 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-11-30 21:17:52 +0900
commita694291a6211537189c6080f77f63cdabfc9b63e (patch)
treeec23d36fc493eeaaedd72f54187652f9df3b4819 /fs/nilfs2/segbuf.h
parente29df395bc6d2d0c89b3d8a5939a24b1b43c2fb6 (diff)
downloadop-kernel-dev-a694291a6211537189c6080f77f63cdabfc9b63e.zip
op-kernel-dev-a694291a6211537189c6080f77f63cdabfc9b63e.tar.gz
nilfs2: separate wait function from nilfs_segctor_write
This separates wait function for submitted logs from the write function nilfs_segctor_write(). A new list of segment buffers "sc_write_logs" is added to hold logs under writing, and double buffering is partially applied to hide io latency. At this point, the double buffering is disabled for blocksize < pagesize because page dirty flag is turned off during write and dirty buffers are not properly collected for pages crossing over segments. To receive full benefit of the double buffering, further refinement is needed to move the io wait outside the lock section of log writer. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/segbuf.h')
-rw-r--r--fs/nilfs2/segbuf.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nilfs2/segbuf.h b/fs/nilfs2/segbuf.h
index 7fbaf5e..6af1630 100644
--- a/fs/nilfs2/segbuf.h
+++ b/fs/nilfs2/segbuf.h
@@ -128,6 +128,8 @@ struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *);
void nilfs_segbuf_free(struct nilfs_segment_buffer *);
void nilfs_segbuf_map(struct nilfs_segment_buffer *, __u64, unsigned long,
struct the_nilfs *);
+void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf,
+ struct nilfs_segment_buffer *prev);
void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64,
struct the_nilfs *);
int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned, time_t);
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