Re: [dm-devel] shared snapshots release 17

[Mike Snitzer <snitzer redhat com>]

On Mon, Mar 22 2010 at  3:18pm -0400,
Mikulas Patocka <mpatocka redhat com> wrote:

> Hi
> 
> New shared snapshots are here.

http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r17/

> It incorporates Mike's changes and it has 
> reworked memory limit:
> - a minimum of 8 buffers is guaranteed to prevent thrasing with too big 
> chunk sizes
> - the cache for multisnapshots is limited to 2% of memory or 25% of 
> vmalloc memory (whichever is lower) [ I'm thinking about making this 
> configurable in /proc ]
> - big chunk sizes (8MB or more) allocate memory always from vmalloc, there 
> is no point in allocating from general allocator

Thanks, I'll have a look.

Mike