[dm-devel] [PATCH 4/8] [dm-bio-prison] Change the bio-prison interface so the memory for the cells is passed in.

[Alasdair G Kergon]

On Tue, Jan 22, 2013 at 11:31:49AM +0000, Joe Thornber wrote:
> Note the mempool alloc _can_ fail with GFP_NOIO/GFP_NOWAIT.

Not with GFP_NOIO.

include/linux/gfp.h:
#define GFP_NOIO        (__GFP_WAIT)

mempool_alloc():
        might_sleep_if(gfp_mask & __GFP_WAIT);

Alasdair