Re: Work Queue for btrfs compression writes

[Austin S Hemmelgarn]

On 07/30/2014 12:54 AM, Nick Krause wrote:
> On Wed, Jul 30, 2014 at 12:37 AM, Gareth Pye <gareth@xxxxxxxxxxxxxx> wrote:
>> You've been replied to politely, now listen and do or shut up.
>>
>>
>> On Wed, Jul 30, 2014 at 1:54 PM, Nick Krause <xerofoify@xxxxxxxxx> wrote:
>>>
>>> Hey Guys ,
>>> I am new to   reading  and writing  kernel code.I got interested in
>>> writing code for btrfs as it seems to
>>> need more work then other file systems and this seems other then
>>> drivers, a good use of time on my part.
>>> I interested in helping improving the compression of btrfs by using  a
>>> set of threads using work queues like XFS
>>> or reads and keeping the page cache after reading compressed blocks as
>>> these seem to be a great way to improve
>>> on  compression performance mostly with large partitions of compressed
>>> data. I am not asking you to write the code
>>> for me but as I am new a little guidance and help would be greatly
>>> appreciated as this seems like too much work for just a newbie.
>>> Thanks A lot,
>>> Nick
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>>
>>
>>
>>
>> --
>> Gareth Pye
>> Level 2 Judge, Melbourne, Australia
>> Australian MTG Forum: mtgau.com
>> gareth@xxxxxxxxxxxxxx - www.rockpaperdynamite.wordpress.com
>> "Dear God, I would like to file a bug report"
> 
> Gareth
> I am asking for advice on not writing the code but can someone please
> test this for me as I don't have many hard drives lying around. In addition
> I am new to btrfs , so I would like to known if this is a good idea or should
> I just drop it?
> Nick
> --
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> 
I would look into using usermode linux (linux built with ARCH=um) for at
least the initial debugging, it is marginally more efficient than
virtualization, doesn't need root privileges, and allows you to run the
kernel under GDB without needing separate hardware with a serial console
or PS/2 keyboard.

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