Re: JFFS2 compression

["Artem B. Bityuckiy" <abityuckiy@yandex.ru>]

> I undersand you, but unfortunatelly now there is no way to change 
> compression mode dimamically. There was (using procfs) but when David 
> tried to commit it to the kernel, someone (I don't remember who but one 
> of the kernel developers) declared it bad.
> 
> David asked me to reimplement it is sysfs, but that is not an easy 
> thing. Not technically. There is no fs subdirectory in sysfs. I read in 
> the mailling list archive of linux-fsdevel@vger.kernel.org. Someone 
> tried to submit a patch to make this fs subdirectory, because he need it 
> for NFS. The answer declared it as very bad, too... (sysfs has a 
> different philosopy...) I had some private discussion with the patch 
> submitter (what happened exactly, what was really the problem,... what 
> is his plan). He wrote that he try it again later. He think the guy who 
> declared his patch bad really hates sysfs (and procfs too). So I decided 
> to wait, too. :(
Ferenc, thanks for story, I really interested why the proc support was 
removed. There is another possibility - ioctl/fcntl. Ok, got it - it is 
not big deal to move compression mode to superblock, but now it is just 
unneeded because there are no interfaces to change the compression mode 
dynamically.
> 
> But this new "compressoin configuration" concept may cause that we don't 
> need sysfs/procfs.
How are you going to set files/directories compression mode (just 
interesting) ?

-- 
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.