Re: [PATCH 0/7] Let user specify the kernel version for features

2016-02-03 Thread David Sterba
Going back to this discussion, On Mon, Nov 30, 2015 at 01:46:15PM +0800, Qu Wenruo wrote: > To be honest, how many guys really unhappy with current default features > behavior *except* you? Me too. Anand's summary matches my view of how we should do it: ". Do it at run time for the running

Re: [PATCH 0/7] Let user specify the kernel version for features

2016-02-03 Thread Chris Mason
On Wed, Feb 03, 2016 at 11:50:38AM +0100, David Sterba wrote: > Going back to this discussion, > > On Mon, Nov 30, 2015 at 01:46:15PM +0800, Qu Wenruo wrote: > > To be honest, how many guys really unhappy with current default features > > behavior *except* you? > > Me too. > > Anand's summary

Re: [PATCH 0/7] Let user specify the kernel version for features

2016-02-03 Thread Qu Wenruo
David Sterba wrote on 2016/02/03 11:50 +0100: Going back to this discussion, On Mon, Nov 30, 2015 at 01:46:15PM +0800, Qu Wenruo wrote: To be honest, how many guys really unhappy with current default features behavior *except* you? Me too. Anand's summary matches my view of how we should

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-29 Thread Anand Jain
(Most of the technical reasoning were already discussed so I won't repeat them here). And jolting for new technical reasons finds only these.. What if the fs is not only for kernel to mount, but also a boot partition for grub? Do you need to check the grub2 version? Check if this is a

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-29 Thread Qu Wenruo
Anand Jain wrote on 2015/11/30 12:54 +0800: (Most of the technical reasoning were already discussed so I won't repeat them here). And jolting for new technical reasons finds only these.. What if the fs is not only for kernel to mount, but also a boot partition for grub? Do you need

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-28 Thread Qu Wenruo
On 11/27/2015 04:41 PM, Anand Jain wrote: I meant, it can be done in packaging level and it's much easier to do. Its all about trade off, and there is no right or wrong, so is tough to arrive at a conclusion even before this was implemented. Below are the choices considered, now

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-26 Thread Anand Jain
Hope we are in sync on.. 1. The term auto that you are using here refs to 'Progs default-features being updated at the _run time_'. 2. In the long run, mostly it would be: progs-version > LTS-kernel-version (for the reason that user would need fsck,tools.. etc) With the new -O comp=

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-26 Thread Qu Wenruo
Anand Jain wrote on 2015/11/27 06:17 +0800: Hope we are in sync on.. 1. The term auto that you are using here refs to 'Progs default-features being updated at the _run time_'. Yes. 2. In the long run, mostly it would be: progs-version > LTS-kernel-version (for the reason that user

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-26 Thread Anand Jain
With the new -O comp= option, the concern on user who want to make a btrfs for newer kernel is hugely reduced. NO!. actually new option -O comp= provides no concern for users who want to create _a btrfs disk layout which is compatible with more than one kernel_. above there are two

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-26 Thread Qu Wenruo
On 11/26/2015 07:18 PM, Anand Jain wrote: With the new -O comp= option, the concern on user who want to make a btrfs for newer kernel is hugely reduced. NO!. actually new option -O comp= provides no concern for users who want to create _a btrfs disk layout which is compatible with more

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-25 Thread Qu Wenruo
Anand Jain wrote on 2015/11/25 20:08 +0800: Sometimes users may want to have a btrfs to be supported on multiple kernel version. A simple example, USB drive can be used with multiple system running different kernel versions. Or in a data center a SAN LUN could be mounted on any system with

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-25 Thread Qu Wenruo
Anand Jain wrote on 2015/11/26 14:07 +0800: On 11/26/2015 10:02 AM, Qu Wenruo wrote: Anand Jain wrote on 2015/11/25 20:08 +0800: Sometimes users may want to have a btrfs to be supported on multiple kernel version. A simple example, USB drive can be used with multiple system running

[PATCH 0/7] Let user specify the kernel version for features

2015-11-25 Thread Anand Jain
Sometimes users may want to have a btrfs to be supported on multiple kernel version. A simple example, USB drive can be used with multiple system running different kernel versions. Or in a data center a SAN LUN could be mounted on any system with different kernel version. Thanks for providing

Re: [PATCH 0/7] Let user specify the kernel version for features

2015-11-25 Thread Anand Jain
On 11/26/2015 10:02 AM, Qu Wenruo wrote: Anand Jain wrote on 2015/11/25 20:08 +0800: Sometimes users may want to have a btrfs to be supported on multiple kernel version. A simple example, USB drive can be used with multiple system running different kernel versions. Or in a data center a SAN