Re: ChewieFS

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Thu, 10 Nov 2011 17:20:37 +0100, Julian Fagir <gnrp%komkon2.de@localhost> 
> wrote:
> 
>> You're declaring it still has some bugs - which are those? Before trying  
>> it
>> out (I hope to have an SSD some time), it would be nice to know them. ;-)
>> The issues listed seem rather technical.
>>
> 
> There are two known bugs:
> - If you write out a file which is greater than the available free space,  
> the file will be resized to the free size (this is normal), and after  
> remount this file will cause a crash.
> - If you truncate a file shorter, the original data stays in the memory  
> until you remount the filesystem. Appending will be working on it, but if  
> you truncate it longer before remounting, the file will be filled by the  
> original data instead of zeros. I didn't find how i can drop the "dirty"  
> page_cache if the FS doesn't need it anymore.

normally uvm_vnp_setsize is used for the task.

YAMAMOTO Takashi

> 
> But, how Adam said, the ChewieFS isn't designed for SSD.
> 
> Tamas Toth