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Re: O_NONBLOCK in JFFS?



On Fri, Jun 28, 2002 at 11:37:48AM -0400, David Woodhouse wrote:
> On Thu, 27 Jun 2002, Yves Rutschle wrote:
> 
> > Does O_NONBLOCK work when writing to JFFS2? Some measures I
> > did seem to show that the write times are similar with or
> > without it, and just slightly slower than actual flash write
> > time (which is fair enough if you don't have O_NONBLOCK I
> > guess).
> > 
> > All in all, it seems to act as if O_SYNC was on all the
> > time.
> 
> We don't do _any_ write-behind in JFFS2; it is entirely synchronous. You
> have to wait for the writes. The garbage collection thread does GC to make
> space ahead of time, so you shouldn't normally have to wait for GC to make
> space for your write, though.

Excellent. Thanks for the info.

/Y

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