[ltp] Fedora on Thinkpads

Marius Gedminas linux-thinkpad@linux-thinkpad.org
Tue, 11 Nov 2003 16:35:13 +0200

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On Tue, Nov 11, 2003 at 01:37:03PM +0100, Tino Keitel wrote:
> On Mon, Nov 10, 2003 at 04:52:39 -0500, Behdad Esfahbod wrote:
> > On Mon, 10 Nov 2003, Tino Keitel wrote:
> > > Buffered IO is used in nearly every Linux installation per default, so
> > > this is nothing special. Could anybody give some details about the
> > > laptop mode? Or are they just using ext2 and noflushd?
> >=20
> > It's a kernel patch, that schedules write backs to whenever the
> > disk is waking up for read access.  Other wise, you get your hard
> > disk always on, as there are always something to write... (access
> > time, ...)
> This feature is already present without a patch in the kupdated, and
> this is how noflushd works. But this will only work with ext2, not with
> any of the journaling file systems, since they bypass the kupdated.

The laptop mode patch does more than that.  See

AFAIU it also patches ext3 but not reiserfs or other journaling fses.

Marius Gedminas
F U cn rd dis U mst uz Unix.

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