On 2018/7/29 10:44, Jaegeuk Kim wrote:
> On 07/29, Chao Yu wrote:
>> On 2018/7/29 10:00, Jaegeuk Kim wrote:
>>> On 07/27, Chao Yu wrote:
>>>> We need to drop PG_checked flag on page as well when we clear PG_uptodate
>>>> flag, in order to avoid treating the page as GCing one later.
>>>
>>> What do you mean "treating the page as GCing one"?
>>
>> I mean if PG_checked flag in page is not cleared, allocator will make it goes
>> into cold area.
>>
>> static int __get_segment_type_6(struct f2fs_io_info *fio)
>> ...
>> if (is_cold_data(fio->page) || file_is_cold(inode))
>> return CURSEG_COLD_DATA;
>
> This will come only when page is dirty. So, it'd better to clear this in
> f2fs_set_data_page_dirty()? set_cold_data() is called after set_page_dirty().
Looks fine, let me send v2.
Thanks,
>
>>
>> Thanks,
>>
>>>
>>>>
>>>> Signed-off-by: Weichao Guo <guoweic...@huawei.com>
>>>> Signed-off-by: Chao Yu <yuch...@huawei.com>
>>>> ---
>>>> fs/f2fs/data.c | 8 +++++++-
>>>> fs/f2fs/dir.c | 1 +
>>>> fs/f2fs/segment.c | 4 +++-
>>>> 3 files changed, 11 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
>>>> index a29f3162b887..2817e2f4eb17 100644
>>>> --- a/fs/f2fs/data.c
>>>> +++ b/fs/f2fs/data.c
>>>> @@ -1768,6 +1768,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
>>>> /* This page is already truncated */
>>>> if (fio->old_blkaddr == NULL_ADDR) {
>>>> ClearPageUptodate(page);
>>>> + clear_cold_data(page);
>>>> goto out_writepage;
>>>> }
>>>> got_it:
>>>> @@ -1943,8 +1944,10 @@ static int __write_data_page(struct page *page,
>>>> bool *submitted,
>>>>
>>>> out:
>>>> inode_dec_dirty_pages(inode);
>>>> - if (err)
>>>> + if (err) {
>>>> ClearPageUptodate(page);
>>>> + clear_cold_data(page);
>>>> + }
>>>>
>>>> if (wbc->for_reclaim) {
>>>> f2fs_submit_merged_write_cond(sbi, inode, 0, page->index, DATA);
>>>> @@ -2534,6 +2537,8 @@ void f2fs_invalidate_page(struct page *page,
>>>> unsigned int offset,
>>>> }
>>>> }
>>>>
>>>> + clear_cold_data(page);
>>>> +
>>>> /* This is atomic written page, keep Private */
>>>> if (IS_ATOMIC_WRITTEN_PAGE(page))
>>>> return f2fs_drop_inmem_page(inode, page);
>>>> @@ -2552,6 +2557,7 @@ int f2fs_release_page(struct page *page, gfp_t wait)
>>>> if (IS_ATOMIC_WRITTEN_PAGE(page))
>>>> return 0;
>>>>
>>>> + clear_cold_data(page);
>>>> set_page_private(page, 0);
>>>> ClearPagePrivate(page);
>>>> return 1;
>>>> diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
>>>> index 7f955c4e86a4..1e4a4122eb0c 100644
>>>> --- a/fs/f2fs/dir.c
>>>> +++ b/fs/f2fs/dir.c
>>>> @@ -734,6 +734,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry,
>>>> struct page *page,
>>>> clear_page_dirty_for_io(page);
>>>> ClearPagePrivate(page);
>>>> ClearPageUptodate(page);
>>>> + clear_cold_data(page);
>>>> inode_dec_dirty_pages(dir);
>>>> f2fs_remove_dirty_inode(dir);
>>>> }
>>>> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
>>>> index 58abbdc53561..4d83961745e6 100644
>>>> --- a/fs/f2fs/segment.c
>>>> +++ b/fs/f2fs/segment.c
>>>> @@ -267,8 +267,10 @@ static int __revoke_inmem_pages(struct inode *inode,
>>>> }
>>>> next:
>>>> /* we don't need to invalidate this in the sccessful status */
>>>> - if (drop || recover)
>>>> + if (drop || recover) {
>>>> ClearPageUptodate(page);
>>>> + clear_cold_data(page);
>>>> + }
>>>> set_page_private(page, 0);
>>>> ClearPagePrivate(page);
>>>> f2fs_put_page(page, 1);
>>>> --
>>>> 2.18.0.rc1
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