From 054afda9991786ead2c2b57cdf3b28d4dd3709f2 Mon Sep 17 00:00:00 2001 From: Yunlei He Date: Wed, 18 Apr 2018 11:06:39 +0800 Subject: [PATCH] f2fs: allocate hot_data for atomic write more strictly If a file not set type as hot, has dirty pages more than threshold 64 before starting atomic write, may be lose hot flag. v1->v2: move set FI_ATOMIC_FILE flag behind flush dirty pages too, in case of dirty pages before starting atomic use atomic mode to write back. Signed-off-by: Yunlei He Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 18be18907529..58f692b568b2 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1686,24 +1686,20 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) if (ret) goto out; - set_inode_flag(inode, FI_ATOMIC_FILE); - set_inode_flag(inode, FI_HOT_DATA); - f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); - if (!get_dirty_pages(inode)) - goto inc_stat; + goto skip_flush; f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING, "Unexpected flush for atomic writes: ino=%lu, npages=%u", inode->i_ino, get_dirty_pages(inode)); ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); - if (ret) { - clear_inode_flag(inode, FI_ATOMIC_FILE); - clear_inode_flag(inode, FI_HOT_DATA); + if (ret) goto out; - } +skip_flush: + set_inode_flag(inode, FI_HOT_DATA); + set_inode_flag(inode, FI_ATOMIC_FILE); + f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); -inc_stat: F2FS_I(inode)->inmem_task = current; stat_inc_atomic_write(inode); stat_update_max_atomic_write(inode); -- 2.30.2