Re: [PATCH] Optimize relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset

[Jens Axboe <axboe@kernel.dk>]

On 2010-11-01 09:08, Mathieu Desnoyers wrote:
> * Jens Axboe (axboe@kernel.dk) wrote:
>> On 2010-10-30 17:47, Mathieu Desnoyers wrote:
>>> BLK_DEV_IO_TRACE seems to still select RELAY. Has it completed its
>>> transition to either Ftrace or Perf ? Depending on Jens, moving blktrace
>>> relay dependency to the Generic Ring Buffer Library might be a good
>>> option to consider.
>>
>> The blktrace user bits is still (by far) the most wide spread way that
>> blktrace is used in the field, and those still rely on relayfs. So no,
>> we can't kill it now.
> 
> What I am proposing is that the Generic Ring Buffer Library could
> replace relayfs without changing any of the interfaces blktrace exposes
> to user-space. Indeed, I would not remove relayfs unless there was a
> replacement.

Sure, I'm open to such a solution as long as it doesn't slow anything
down for blktrace (primary concern, certainly) and retains feature
parity. I'm not married to relayfs, it's just what was available easily
when I added blktrace originally.

-- 
Jens Axboe