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f2fs: write small sized IO to hot log

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It would better split small and large IOs separately in order to get more
consecutive big writes.

The default threshold is set to 64KB, but configurable by sysfs/min_hot_blocks.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2017-03-24 20:05:13 -04:00
parent a7eeb82385
commit ef095d19e8
6 changed files with 21 additions and 7 deletions
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9
fs/f2fs/data.c
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@@ -1432,6 +1432,8 @@ write:
need_balance_fs = true;
else if (has_not_enough_free_secs(sbi, 0, 0))
goto redirty_out;
else
set_inode_flag(inode, FI_HOT_DATA);
err = -EAGAIN;
if (f2fs_has_inline_data(inode)) {
@@ -1457,6 +1459,7 @@ out:
if (wbc->for_reclaim) {
f2fs_submit_merged_bio_cond(sbi, inode, 0, page->index,
DATA, WRITE);
clear_inode_flag(inode, FI_HOT_DATA);
remove_dirty_inode(inode);
submitted = NULL;
}
@@ -1511,6 +1514,12 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
pagevec_init(&pvec, 0);
if (get_dirty_pages(mapping->host) <=
SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
set_inode_flag(mapping->host, FI_HOT_DATA);
else
clear_inode_flag(mapping->host, FI_HOT_DATA);
if (wbc->range_cyclic) {
writeback_index = mapping->writeback_index; /* prev offset */
index = writeback_index;