From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chao Yu Subject: Re: [PATCH 4/4] f2fs: fix to spread clear_cold_data() Date: Sun, 29 Jul 2018 11:19:27 +0800 Message-ID: <2c48e483-25ea-1a13-d605-59ce939832d8@kernel.org> References: <20180727101516.41403-1-yuchao0@huawei.com> <20180727101516.41403-4-yuchao0@huawei.com> <20180729020013.GG83620@jaegeuk-macbookpro.roam.corp.google.com> <20180729024456.GJ83620@jaegeuk-macbookpro.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-1.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1fjcF9-00074m-KT for linux-f2fs-devel@lists.sourceforge.net; Sun, 29 Jul 2018 03:19:39 +0000 Received: from mail.kernel.org ([198.145.29.99]) by sfi-mx-4.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) id 1fjcF6-001Foy-T2 for linux-f2fs-devel@lists.sourceforge.net; Sun, 29 Jul 2018 03:19:39 +0000 In-Reply-To: <20180729024456.GJ83620@jaegeuk-macbookpro.roam.corp.google.com> Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: Jaegeuk Kim Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net 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 >>>> Signed-off-by: Chao Yu >>>> --- >>>> 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 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot