On 2016/11/3 1:23, Jaegeuk Kim wrote:
> On Wed, Nov 02, 2016 at 03:34:32PM +0800, Chao Yu wrote:
>> Hi Jaegeuk,
>>
>> On 2016/10/21 10:28, Jaegeuk Kim wrote:
>>> This patch replaces the copied code with original generic function.
>>
>> Will we plan to do further enhance inside f2fs_set_page_dirty_nobuffers, if
>> we
>> don't it's better revert fe76b796fc5194cc3d57265002e3a748566d073f, as we
>> don't
>> need to wrap __set_page_dirty_nobuffers.
>
> Urg. I was confused something here.
> Please ignore this patch. I won't merge this patch.
Why? isn't __set_page_dirty_nobuffers more fit for f2fs' non-buffer management?
Thanks,
>
>> BTW, does the original patch make memory cgroup functionality problematic?
>
> I don't think there is a problem, since I just copied
> __set_page_dirty_buffers()
> except page_has_buffers' stuffs.
>
> Thank you for pointing this out. :)
>
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
>>> ---
>>> fs/f2fs/data.c | 29 -----------------------------
>>> fs/f2fs/f2fs.h | 6 +++++-
>>> 2 files changed, 5 insertions(+), 30 deletions(-)
>>>
>>> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
>>> index 68edb47..3954315 100644
>>> --- a/fs/f2fs/data.c
>>> +++ b/fs/f2fs/data.c
>>> @@ -1801,35 +1801,6 @@ int f2fs_release_page(struct page *page, gfp_t wait)
>>> return 1;
>>> }
>>>
>>> -/*
>>> - * This was copied from __set_page_dirty_buffers which gives higher
>>> performance
>>> - * in very high speed storages. (e.g., pmem)
>>> - */
>>> -void f2fs_set_page_dirty_nobuffers(struct page *page)
>>> -{
>>> - struct address_space *mapping = page->mapping;
>>> - unsigned long flags;
>>> -
>>> - if (unlikely(!mapping))
>>> - return;
>>> -
>>> - spin_lock(&mapping->private_lock);
>>> - lock_page_memcg(page);
>>> - SetPageDirty(page);
>>> - spin_unlock(&mapping->private_lock);
>>> -
>>> - spin_lock_irqsave(&mapping->tree_lock, flags);
>>> - WARN_ON_ONCE(!PageUptodate(page));
>>> - account_page_dirtied(page, mapping);
>>> - radix_tree_tag_set(&mapping->page_tree,
>>> - page_index(page), PAGECACHE_TAG_DIRTY);
>>> - spin_unlock_irqrestore(&mapping->tree_lock, flags);
>>> - unlock_page_memcg(page);
>>> -
>>> - __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
>>> - return;
>>> -}
>>> -
>>> static int f2fs_set_data_page_dirty(struct page *page)
>>> {
>>> struct address_space *mapping = page->mapping;
>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>> index 168f939..b66a04c 100644
>>> --- a/fs/f2fs/f2fs.h
>>> +++ b/fs/f2fs/f2fs.h
>>> @@ -1960,6 +1960,11 @@ static inline unsigned long f2fs_find_next_bit(const
>>> void *addr,
>>> return find_next_bit(addr, size, offset + 2);
>>> }
>>>
>>> +static inline void f2fs_set_page_dirty_nobuffers(struct page *page)
>>> +{
>>> + __set_page_dirty_nobuffers(page);
>>> +}
>>> +
>>> #define get_inode_mode(i) \
>>> ((is_inode_flag_set(i, FI_ACL_MODE)) ? \
>>> (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
>>> @@ -2200,7 +2205,6 @@ struct page *get_new_data_page(struct inode *, struct
>>> page *, pgoff_t, bool);
>>> int do_write_data_page(struct f2fs_io_info *);
>>> int f2fs_map_blocks(struct inode *, struct f2fs_map_blocks *, int, int);
>>> int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64,
>>> u64);
>>> -void f2fs_set_page_dirty_nobuffers(struct page *);
>>> void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
>>> int f2fs_release_page(struct page *, gfp_t);
>>> #ifdef CONFIG_MIGRATION
>>>
>
> .
>
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