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f2fs: refactor bio-related operations

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This patch integrates redundant bio operations on read and write IOs.

1. Move bio-related codes to the top of data.c.
2. Replace f2fs_submit_bio with f2fs_submit_merged_bio, which handles read
   bios additionally.
3. Introduce __submit_merged_bio to submit the merged bio.
4. Change f2fs_readpage to f2fs_submit_page_bio.
5. Introduce f2fs_submit_page_mbio to integrate previous submit_read_page and
   submit_write_page.

Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com >
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim
2013-11-30 12:51:14 +09:00
parent 187b5b8b3d
commit 93dfe2ac51
8 changed files with 257 additions and 299 deletions
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14
fs/f2fs/node.c
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@@ -106,11 +106,11 @@ static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid)
f2fs_put_page(page, 1);
continue;
}
submit_read_page(sbi, page, index, READ_SYNC | REQ_META);
f2fs_submit_page_mbio(sbi, page, index, META, READ);
mark_page_accessed(page);
f2fs_put_page(page, 0);
}
f2fs_submit_read_bio(sbi, READ_SYNC | REQ_META);
f2fs_submit_merged_bio(sbi, META, true, READ);
}
static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
@@ -891,7 +891,7 @@ fail:
* LOCKED_PAGE: f2fs_put_page(page, 1)
* error: nothing
*/
static int read_node_page(struct page *page, int type)
static int read_node_page(struct page *page, int rw)
{
struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
struct node_info ni;
@@ -906,7 +906,7 @@ static int read_node_page(struct page *page, int type)
if (PageUptodate(page))
return LOCKED_PAGE;
return f2fs_readpage(sbi, page, ni.blk_addr, type);
return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw);
}
/*
@@ -1136,8 +1136,8 @@ continue_unlock:
}
if (wrote)
f2fs_submit_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL);
f2fs_submit_merged_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL,
WRITE);
return nwritten;
}
@@ -1592,7 +1592,7 @@ int restore_node_summary(struct f2fs_sb_info *sbi,
*/
ClearPageUptodate(page);
if (f2fs_readpage(sbi, page, addr, READ_SYNC))
if (f2fs_submit_page_bio(sbi, page, addr, READ_SYNC))
goto out;
lock_page(page);