Re: [PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-18 Thread Darrick J. Wong
On Mon, Mar 18, 2013 at 06:41:34PM +0100, Jan Kara wrote: > On Fri 15-03-13 16:28:16, Darrick J. Wong wrote: > > Walking a bio's page mappings has proved problematic, so create a new bio > > flag > > to indicate that a bio's data needs to be snapshotted in order to guarantee > > stable pages

Re: [PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-18 Thread Jan Kara
On Fri 15-03-13 16:28:16, Darrick J. Wong wrote: > Walking a bio's page mappings has proved problematic, so create a new bio flag > to indicate that a bio's data needs to be snapshotted in order to guarantee > stable pages during writeback. Next, for the one user (ext3/jbd) of > snapshotting,

Re: [PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-18 Thread Jan Kara
On Fri 15-03-13 16:28:16, Darrick J. Wong wrote: Walking a bio's page mappings has proved problematic, so create a new bio flag to indicate that a bio's data needs to be snapshotted in order to guarantee stable pages during writeback. Next, for the one user (ext3/jbd) of snapshotting, hook

Re: [PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-18 Thread Darrick J. Wong
On Mon, Mar 18, 2013 at 06:41:34PM +0100, Jan Kara wrote: On Fri 15-03-13 16:28:16, Darrick J. Wong wrote: Walking a bio's page mappings has proved problematic, so create a new bio flag to indicate that a bio's data needs to be snapshotted in order to guarantee stable pages during

[PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-15 Thread Darrick J. Wong
Walking a bio's page mappings has proved problematic, so create a new bio flag to indicate that a bio's data needs to be snapshotted in order to guarantee stable pages during writeback. Next, for the one user (ext3/jbd) of snapshotting, hook all the places where writes can be initiated without

[PATCH] mm: Make snapshotting pages for stable writes a per-bio operation

2013-03-15 Thread Darrick J. Wong
Walking a bio's page mappings has proved problematic, so create a new bio flag to indicate that a bio's data needs to be snapshotted in order to guarantee stable pages during writeback. Next, for the one user (ext3/jbd) of snapshotting, hook all the places where writes can be initiated without