On Mon, 22 Jun 2009 14:59:55 +0200 Joerg Sonnenberger <[email protected]> said:
> On Sat, Jun 20, 2009 at 09:25:59PM +1000, Carsten Haitzler wrote: > > > Is it really usefull to unmap ? can't we trust the kernel to drop it > > > when under presure ? > > > > unmapping should help give a hint... it also looks better in top/ps :) > > The first part is already done by using madvise. It doesn't forcefully > trash the VM space though. neither does munmap() - it sits in cache. (as it does when mmaped()). but it looks better when looking at mem footprint and provides an extra hint to the kernel - if mapped, the kernel can assume that at some point you may need the data - when not mapped, it can just put it in speculative cache and forget about it. -- ------------- Codito, ergo sum - "I code, therefore I am" -------------- The Rasterman (Carsten Haitzler) [email protected] ------------------------------------------------------------------------------ _______________________________________________ enlightenment-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
