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f2fs: don't keep meta pages used for block migration 

For migration of encrypted inode's block, we load data of encrypted block
into meta inode's page cache, after checkpoint, those all intermediate
pages should be clean, and no one will read them again, so let's just
release them for more memory.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-07-27 18:15:13 +08:00 committed by Jaegeuk Kim
parent 4ddc1b28aa
commit 18767e6263
1 changed files with 8 additions and 0 deletions
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8
fs/f2fs/checkpoint.c
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@ -1408,6 +1408,14 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
commit_checkpoint(sbi, ckpt, start_blk);
wait_on_all_pages_writeback(sbi);
/*
* invalidate intermediate page cache borrowed from meta inode
* which are used for migration of encrypted inode's blocks.
*/
if (f2fs_sb_has_encrypt(sbi->sb))
invalidate_mapping_pages(META_MAPPING(sbi),
MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
f2fs_release_ino_entry(sbi, false);
clear_sbi_flag(sbi, SBI_IS_DIRTY);