On Wed 2 May 2007 10:04, Hugh Dickins pondered: > On Tue, 1 May 2007, Phillip Susi wrote: > > I seem to remember seeing some patches go by at some point that > > allowed one of the rom type embeded system filesystems to directly > > execute binaries out of the original rom memory rather than copying > > them to ram first, then executing from there. I was wondering if > > rootfs or tmpfs support such execute in place today, or if > > binaries executed from there have their code segments duplicated > > in ram? > > Only ext2 supports it today: see Documentation/filesystems/xip.txt >
Depends on if it is a noMMU or MMU platform. Since noMMU platforms can't re-arrange non-contiguous blocks (which appears in a read/write ext2 file system) we need to use a read only romfs which applications are guaranteed to be contiguous by design. I don't think the noMMU case is documented in xip.txt -Robin - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/