Re: [dm-devel] deterministic io throughput in multipath

2016-12-21 Thread Muneendra Kumar M
Hi Ben, Thanks for the reply. I will look into this parameters will do the internal testing and let you know the results. Regards, Muneendra. -Original Message- From: Benjamin Marzinski [mailto:bmarz...@redhat.com] Sent: Wednesday, December 21, 2016 9:40 PM To: Muneendra Kumar M

Re: [dm-devel] : Query on dmstats(8)

2016-12-21 Thread Bryn M. Reeves
Hi Ravi, On Wed, Dec 21, 2016 at 12:38:12PM +, Nalla, Ravikanth wrote: > > In dmstats(8) man page, what is the exact difference between "read_time" and > "read_ticks" > and also the exact difference between "write_nsecs" and "write_ticks"? > > read_time > Accumulated

Re: [dm-devel] deterministic io throughput in multipath

2016-12-21 Thread Benjamin Marzinski
Have you looked into the delay_watch_checks and delay_wait_checks configuration parameters? The idea behind them is to minimize the use of paths that are intermittently failing. -Ben On Mon, Dec 19, 2016 at 11:50:36AM +, Muneendra Kumar M wrote: >Customers using Linux host (mostly RHEL

Re: [dm-devel] dm-crypt optimization

2016-12-21 Thread Milan Broz
On 12/20/2016 10:41 AM, Binoy Jayan wrote: > At a high level the goal is to maximize the size of data blocks that get > passed > to hardware accelerators, minimizing the overhead from setting up and tearing > down operations in the hardware. Currently dm-crypt itself is a big blocker as > it

[dm-devel] : Query on dmstats(8)

2016-12-21 Thread Nalla, Ravikanth
In dmstats(8) man page, what is the exact difference between "read_time" and "read_ticks" and also the exact difference between "write_nsecs" and "write_ticks"? read_time Accumulated duration of all read requests (ns). read_ticks Nanoseconds spent servicing reads.

Re: [dm-devel] [RFC PATCH] mm: introduce kv[mz]alloc helpers

2016-12-21 Thread Michal Hocko
It seems that this email didn't get delivered due to some stupid gmail spam policy. Let me try to repost via a different relay. Sorry to those who have seen the original message and get a duplicate now. On Wed 21-12-16 08:03:53, Michal Hocko wrote: > On Tue 20-12-16 14:13:41, Andrew Morton wrote: