Re: Memory mapped files question

[Antonio Vargas]

On Mon, Apr 14, 2003 at 07:36:39AM -0700, Martin J. Bligh wrote:
> > Hi, everyone.  I'm running into a problem that I hope someone else has seen,
> > and maybe can help solve.  We're using the mmap system function for memory
> > mapped files, but our updates never get flushed until we munmap or msysnc.
> > Are we missing something?  Is there a tunable parameter in the kernel or
> > filing system that can be set to flag these updates as 'write required'?
> 
> This was discussed about a week ago on either linux-kernel or linux-mm.
> The short answer is "yes, that's deliberate", but an archive search would 
> probably be fruitful.
> 
> M.

Martin, something which was not mentioned last week (I've just checked).

It's OK if we never write to disk unless explicitely told, but will we writeback
when we munmap?

Greets, Antonio.