Re: [dm-devel] Proposal for annotating _unstable_ pages

2015-05-22 Thread Kent Overstreet
On Fri, May 22, 2015 at 11:17:59AM -0700, Darrick J. Wong wrote: > Back when I was writing the stable pages patches, I observed that some of the > filesystems didn't hold the pages containing their own metadata stable during > writeback on a stable-writes device. The journalling filesystems were f

Re: [dm-devel] Proposal for annotating _unstable_ pages

2015-05-22 Thread Darrick J. Wong
On Thu, May 21, 2015 at 09:21:12PM +0200, Jan Kara wrote: > On Thu 21-05-15 11:09:55, Kent Overstreet wrote: > > On Thu, May 21, 2015 at 06:54:53PM +0200, Jan Kara wrote: > > > On Wed 20-05-15 18:04:40, Kent Overstreet wrote: > > > > > Yeah. I never figured out a sane way to migrate pages and keep