Re: [PATCHv4 3/3] jbd/jbd2: use non-movable memory for the jbd superblock

On Thu, Sep 04, 2014 at 04:29:41PM +0900, Gioh Kim wrote:

A long-lasting buffer-cache can distrub page migration so that
it must be allocated from non-movable area.

The journal_init_inode is creating a buffer-cache for superblock journaling.
The superblock exists until system shutdown so that the buffer-cache
for the superblock would also exist for a long time
and it can distrub page migration.

This patch make the buffer-cache be allocated from non-movable area
not to distrub page migration.

Signed-off-by: Gioh Kim <redacted>
Reviewed-by: Jan Kara <jack@suse.cz>

Thanks, I've applied this to the ext4 git tree with a slightly
rewritten commit description (for clarity).

						- Ted