Commit e64347ae authored by Fengnan Chang's avatar Fengnan Chang Committed by Jaegeuk Kim
Browse files

f2fs: support POSIX_FADV_DONTNEED drop compressed page cache 



Previously, compressed page cache drop when clean page cache, but
POSIX_FADV_DONTNEED can't clean compressed page cache because raw page
don't have private data, and won't call f2fs_invalidate_compress_pages.
This commit call f2fs_invalidate_compress_pages() directly in
f2fs_file_fadvise() for POSIX_FADV_DONTNEED case.

Signed-off-by: default avatarFengnan Chang <changfengnan@vivo.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent d1917865

fs/f2fs/file.c

+9 −3
Original line number Diff line number Diff line
@@ -4663,12 +4663,12 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 
static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,

		int advice)

{

	struct inode *inode;

	struct address_space *mapping;

	struct backing_dev_info *bdi;

	struct inode *inode = file_inode(filp);

	int err;



	if (advice == POSIX_FADV_SEQUENTIAL) {

		inode = file_inode(filp);

		if (S_ISFIFO(inode->i_mode))

			return -ESPIPE;
@@ -4685,7 +4685,13 @@ static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len, 
		return 0;

	}



	return generic_fadvise(filp, offset, len, advice);

	err = generic_fadvise(filp, offset, len, advice);

	if (!err && advice == POSIX_FADV_DONTNEED &&

		test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&

		f2fs_compressed_file(inode))

		f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);



	return err;

}



#ifdef CONFIG_COMPAT