[dm-devel] shared snapshots release 17
Mike Snitzer
snitzer at redhat.com
Mon Mar 22 19:31:03 UTC 2010
On Mon, Mar 22 2010 at 3:18pm -0400,
Mikulas Patocka <mpatocka at 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
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