Re: A thought about IO scheduler in linux kernel for SSD

2013-10-25 Thread Jan Kara
On Fri 25-10-13 11:10:22, 韩磊 wrote: > 2013/10/23 Jan Kara : > > On Wed 23-10-13 08:47:44, 韩磊 wrote: > >> Nowadays,the IO schedulers in linux kernel have four types: > >> > >> deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is > >> not a good scheduler for SSD,dealine may be a

Re: A thought about IO scheduler in linux kernel for SSD

2013-10-24 Thread 韩磊
Thanks for your thought! It may not make much sense. Because I think the probability of two bios have the same start sector and the situation mentioned by Ming Lei is too low. Thanks , Bonben 2013/10/25 Ming Lei : > On Wed, Oct 23, 2013 at 6:59 PM, Jan Kara wrote: >> On Wed 23-10-13 08:47:44, 韩磊

Re: A thought about IO scheduler in linux kernel for SSD

2013-10-24 Thread Ming Lei
On Wed, Oct 23, 2013 at 6:59 PM, Jan Kara wrote: > On Wed 23-10-13 08:47:44, 韩磊 wrote: >> Nowadays,the IO schedulers in linux kernel have four types: >> >> deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is >> not a good scheduler for SSD,dealine may be a good choice. > >> W

Re: A thought about IO scheduler in linux kernel for SSD

2013-10-24 Thread 韩磊
2013/10/23 Jan Kara : > On Wed 23-10-13 08:47:44, 韩磊 wrote: >> Nowadays,the IO schedulers in linux kernel have four types: >> >> deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is >> not a good scheduler for SSD,dealine may be a good choice. > > That doesn't make much sense

Re: A thought about IO scheduler in linux kernel for SSD

2013-10-23 Thread Jan Kara
On Wed 23-10-13 08:47:44, 韩磊 wrote: > Nowadays,the IO schedulers in linux kernel have four types: > > deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is > not a good scheduler for SSD,dealine may be a good choice. > When deadline runs,it has a mount of computation about mer

A thought about IO scheduler in linux kernel for SSD

2013-10-22 Thread 韩磊
Nowadays,the IO schedulers in linux kernel have four types: deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is not a good scheduler for SSD,dealine may be a good choice. When deadline runs,it has a mount of computation about merging and sorting.Merge has three types: front

A thought about IO scheduler in linux kernel for SSD

2013-10-22 Thread 韩磊
Nowadays,the IO schedulers in linux kernel have four types: deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is not a good scheduler for SSD,dealine may be a good choice. When deadline runs,it has a mount of computation about merging and sorting.Merge has three types: front

A thought about IO scheduler in linux kernel for SSD

2013-10-22 Thread 韩磊
Nowadays,the IO schedulers in linux kernel have four types: deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is not a good scheduler for SSD,dealine may be a good choice. When deadline runs,it has a mount of computation about merging and sorting.Merge has three types: front_me