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Message-id: <000401cfb76b$a3957b20$eac07160$@samsung.com> Date: Thu, 14 Aug 2014 10:57:10 +0800 From: Chao Yu <chao2.yu@...sung.com> To: 'Jaegeuk Kim' <jaegeuk@...nel.org> Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net Subject: RE: [f2fs-dev] [PATCH 08/13] f2fs: do checkpoint at f2fs_put_super Hi Jaegeuk, > -----Original Message----- > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org] > Sent: Wednesday, August 13, 2014 3:49 AM > To: linux-kernel@...r.kernel.org; linux-fsdevel@...r.kernel.org; > linux-f2fs-devel@...ts.sourceforge.net > Cc: Jaegeuk Kim > Subject: [f2fs-dev] [PATCH 08/13] f2fs: do checkpoint at f2fs_put_super > > The generic_shutdown_super calls sync_filesystem, evict_inode, and then > f2fs_put_super. In f2fs_evict_inode, we remain some dirty inode information > so we should release them at f2fs_put_super. > > But normally, it's more reasonable to set its superblock as dirty when > evict_inode is called. After applying this patch, when we mount and then umount f2fs image without modification, we will write checkpoint in f2fs_put_super even though we have no more dirty data to sync, it's not needed. "some dirty inode information" you mentioned is inode information in ->ino_root of sbi, right? Regards, Yu > > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org> > --- > fs/f2fs/inode.c | 1 + > fs/f2fs/super.c | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c > index 2c39999..eeaf5aa 100644 > --- a/fs/f2fs/inode.c > +++ b/fs/f2fs/inode.c > @@ -303,6 +303,7 @@ no_delete: > add_dirty_inode(sbi, inode->i_ino, APPEND_INO); > if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE)) > add_dirty_inode(sbi, inode->i_ino, UPDATE_INO); > + F2FS_SET_SB_DIRT(sbi); > out_clear: > clear_inode(inode); > } > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c > index 633315a..60e3554 100644 > --- a/fs/f2fs/super.c > +++ b/fs/f2fs/super.c > @@ -432,7 +432,7 @@ static void f2fs_put_super(struct super_block *sb) > stop_gc_thread(sbi); > > /* We don't need to do checkpoint when it's clean */ > - if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) > + if (sbi->s_dirty) > write_checkpoint(sbi, true); > > iput(sbi->node_inode); > -- > 1.8.5.2 (Apple Git-48) > > > ------------------------------------------------------------------------------ > _______________________________________________ > Linux-f2fs-devel mailing list > Linux-f2fs-devel@...ts.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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