Decreasing dirty_writeback_centisecs & dirty_expire_centisecs to 10 ?

[Rob Landley]

On Tuesday 05 September 2006 11:55 am, Raphaël HUCK wrote:
> In an embedded system running on Flash memory, which is allowing users 
> to plug and use USB devices (mostly USB Mass Storage),
> 
> would it be possible to decrease "dirty_writeback_centisecs" from 3000 
> to 10, and "dirty_expire_centisecs" from 3000 to 10 ?
> 
> /proc/sys/vm/dirty_writeback_centisecs
> /proc/sys/vm/dirty_expire_centisecs

These are kernel options, and they look like they're modifiable at runtime.  
What does this have to do with busybox?

> so that they can remove the USB device at any time and not lose buffers ?
> 
> Mounting with the "sync" option is not a good idea, as it is really 
> slow, and can destroy USB Keys rather quickly.

What options you pass to mount are up to you.

> And in my case it is impossible to predict when the user is going to 
> unplug the USB key to unmount before.
> 
> Thanks in advance.

I don't think you sent this to the right list.

> --Raphaël HUCK

Rob
-- 
Never bet against the cheap plastic solution.