Re: [PATCH] fcache: a remapping boot cache

[James]

Set this up on my laptop yesterday with some awesome results. I'm
using 2.6.17-ck1 which has v2.1.

Heres some bootcharts, before, after, and a prime run.

http://archlinux.org/~james/normal.png
http://archlinux.org/~james/fs-fcache.png
http://archlinux.org/~james/fs-fcache-prime.png

Repeated boots show about the same 6 second improvement, 32 down to 26
seconds. Looking at the slowdowns in the fs-fcache run, most are due
to cpu load, waiting on network or, modprobe, and not disk access. X
now starts nearly instantaneously.

As an experiment, I primed my cache right through to logging into my
desktop environment. It was so effective, that now when I login, the
GNOME splash screen only flickers onto the screen briefly, and the
panels appear almost instantly. This is a big improvment over without
fcache, where you'd see each component of GNOME being loaded on the
splash screen, nautilus, metacity, and the panels would take quite a
bit of time to render and load all their applets.

Impressive work, I hope to see it broadened to other filesystems,
improved and merged to vanilla soon because it has clear improvements.

James
--
iphitus - Beyond Maintainer, Arch Trusted User, Arch Developer.
Home:iphitus.loudas.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/