[MPlayer-dev-eng] [patch] try mmap(MAP_PRIVATE) fallback for no-mmu systems in fbdev vo
vapier.adi at gmail.com
Mon May 7 18:52:02 CEST 2007
On 2/1/07, Rich Felker <dalias at aerifal.cx> wrote:
> On Thu, Feb 01, 2007 at 11:10:26AM +0100, Reimar Döffinger wrote:
> > > Benjamin Z., you are probably a better fit to test it, what do you
> > > think about it?
> > Any why is MAP_SHARED used in the first place anyway? Actually, upon
> > reading the documentation on mmap, I see no way this could work with
> > MAP_PRIVATE unless they have a non-conforming mmap...
> I don't think MAP_PRIVATE is correct for mapping devices. It certainly
> has strange behavior. MAP_SHARED _should_ work with devices on no-mmu
> systems (actually with files too) but the ucLinux folks won't
> implement it for some reason, even tho supporting it for devices is
> just a matter of removing the "check-for-MAP_SHARED-and-fail" lines.
> In any case, the approach of trying MAP_SHARED first and falling back
> to MAP_PRIVATE is fine IMO.
patch ping ? this patch still applies cleanly to current trunk ...
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