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| author | Chao Yu <chao2.yu@samsung.com> | 2015-10-12 17:05:59 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-12 14:03:15 -0700 |
| commit | 26879fb101f28c554294eaf25ac7817a2825b180 (patch) | |
| tree | 06eef8e5fc29c7dd5638cf2f78cd0bcc46575d79 /fs/f2fs/node.c | |
| parent | 2b947003fa98d5a39f3b21214380d0b1daf750b5 (diff) | |
| download | talos-obmc-linux-26879fb101f28c554294eaf25ac7817a2825b180.tar.gz talos-obmc-linux-26879fb101f28c554294eaf25ac7817a2825b180.zip | |
f2fs: support lower priority asynchronous readahead in ra_meta_pages
Now, we use ra_meta_pages to reads continuous physical blocks as much as
possible to improve performance of following reads. However, ra_meta_pages
uses a synchronous readahead approach by submitting bio with READ, as READ
is with high priority, it can not be used in the case of preloading blocks,
and it's not sure when these RAed pages will be used.
This patch supports asynchronous readahead in ra_meta_pages by tagging bio
with READA flag in order to allow preloading.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.c')
| -rw-r--r-- | fs/f2fs/node.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index c61dfb695308..ad98e35f3fcb 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1529,7 +1529,8 @@ static void build_free_nids(struct f2fs_sb_info *sbi) return; /* readahead nat pages to be scanned */ - ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); + ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, + META_NAT, true); while (1) { struct page *page = get_current_nat_page(sbi, nid); @@ -1804,7 +1805,7 @@ int restore_node_summary(struct f2fs_sb_info *sbi, nrpages = min(last_offset - i, bio_blocks); /* readahead node pages */ - ra_meta_pages(sbi, addr, nrpages, META_POR); + ra_meta_pages(sbi, addr, nrpages, META_POR, true); for (idx = addr; idx < addr + nrpages; idx++) { struct page *page = get_tmp_page(sbi, idx); |
