On Sun, Apr 01, 2001 at 03:28:05PM -0500, Tim Hockin wrote:
> > Without syncing, Linux writes whenever it thinks it's appropriate, e.g.
> > when pages have to be freed (I think also when the bdflush writes back
> > data, i.e. every 30 seconds by default).
>
> what about mmap() on non-filesystem files (/dev/mem, /proc/bus/pci...) ?
They map physically present memory directly and do not have to be
synced, since all writes go directly to their destination (which is of
course not possible with disk files). I'm not that sure if PCI is a bit
special case though, since not all architectures can access it like
memory.
-- Andreas E. Bombe <andreas.bombe@munich.netsurf.de> DSA key 0x04880A44 http://home.pages.de/~andreas.bombe/ http://linux1394.sourceforge.net/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Apr 07 2001 - 21:00:09 EST