Re: dm stripe: add DAX support

2016-07-20 Thread Jens Axboe
On 07/20/2016 06:01 PM, Mike Snitzer wrote: On Wed, Jul 13 2016 at 11:03am -0400, Kani, Toshimitsu wrote: On Tue, 2016-07-12 at 22:01 -0400, Mike Snitzer wrote: On Tue, Jul 12 2016 at 6:22pm -0400, Kani, Toshimitsu wrote: On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: : Thanks

Re: dm stripe: add DAX support

2016-07-20 Thread Mike Snitzer
On Wed, Jul 13 2016 at 11:03am -0400, Kani, Toshimitsu wrote: > On Tue, 2016-07-12 at 22:01 -0400, Mike Snitzer wrote: > > On Tue, Jul 12 2016 at  6:22pm -0400, > > Kani, Toshimitsu wrote: > > > On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: > > > >   >  : > > Thanks for putting this sum

Re: dm stripe: add DAX support

2016-07-13 Thread Kani, Toshimitsu
On Tue, 2016-07-12 at 22:01 -0400, Mike Snitzer wrote: > On Tue, Jul 12 2016 at  6:22pm -0400, > Kani, Toshimitsu wrote: > > On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: > > >    : > Thanks for putting this summary together.  Unfortunately none of the DM > changes can be queued for 4.8 u

Re: dm stripe: add DAX support

2016-07-12 Thread Mike Snitzer
On Tue, Jul 12 2016 at 6:22pm -0400, Kani, Toshimitsu wrote: > On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: > >  > > BTW, if in your testing you could evaluate/quantify any extra overhead > > from DM that'd be useful to share.  It could be there are bottlenecks > > that need to be fixe

Re: dm stripe: add DAX support

2016-07-12 Thread Kani, Toshimitsu
On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: >  > BTW, if in your testing you could evaluate/quantify any extra overhead > from DM that'd be useful to share.  It could be there are bottlenecks > that need to be fixed, etc. Here are some results from fio benchmark.  The test is single-thr

Re: dm stripe: add DAX support

2016-06-24 Thread Kani, Toshimitsu
On Fri, 2016-06-24 at 16:02 -0400, Mike Snitzer wrote: > On Fri, Jun 24 2016 at  3:58pm -0400, > kbuild test robot wrote: > > > > > Hi, > > > > [auto build test WARNING on dm/for-next] > > [also build test WARNING on v4.7-rc4 next-20160624] > > [if your patch is applied to the wrong git tree, p

Re: dm stripe: add DAX support

2016-06-24 Thread Mike Snitzer
On Fri, Jun 24 2016 at 3:58pm -0400, kbuild test robot wrote: > Hi, > > [auto build test WARNING on dm/for-next] > [also build test WARNING on v4.7-rc4 next-20160624] > [if your patch is applied to the wrong git tree, please drop us a note to > help improve the system] > > url: > https://

Re: dm stripe: add DAX support

2016-06-24 Thread Kani, Toshimitsu
On Fri, 2016-06-24 at 14:29 -0400, Mike Snitzer wrote: > On Fri, Jun 24 2016 at  2:23pm -0400, > Toshi Kani wrote:  : > Thanks, once jens queues the block changes I'll be able to pull this in > to linux-dm.git > > BTW, if in your testing you could evaluate/quantify any extra overhead > from DM th

Re: dm stripe: add DAX support

2016-06-24 Thread Mike Snitzer
On Fri, Jun 24 2016 at 2:23pm -0400, Toshi Kani wrote: > Change dm-stripe to implement direct_access function, > stripe_direct_access(), which maps bdev and sector and > calls direct_access function of its physical target device. > > Signed-off-by: Toshi Kani > Cc: Alasdair Kergon > Cc: Dan W