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SubjectRe: 2.6.17-ck1: fcache problem...
On Sun, 25 Jun 2006 12:28:39 +0200
Jens Axboe <axboe@suse.de> wrote:

> > [ 26.673525] fcache: found serial 33, expected 34.
> > [ 26.673529] fcache: reprime the cache!
> > [ 26.673535] ext3: failed to open fcache (err=-22)
>
> Hmm, and you are sure that the fs is properly umounted on reboot? Or is
> it just remounted ro? It looks like fcache_close_dev() isn't being
> called, so the cache serial doesn't match what we expect from the fs,
> hence fcache bails out since it could indicate that the fs has been
> changed without fcache being attached.

Ahh... it is the root fs and it's just remounted read-only by the
standard Gentoo scripts ;)

I don't think that unmounting it is trivial (you need to chroot to a
virtual FS or something...). Does any distro do it?

>
> What kind of speedup did you see?

with cold caches...

NORMAL
from Grub to KDM login 42"5 (~6" to reach init)
KDE 3.5.3 startup 10"
Firefox 7"

FCACHE
from Grub to KDM login 31"4 (~6" to reach init)
KDE 3.5.3 startup 4"
Firefox 2"4


:)

--
Paolo Ornati
Linux 2.6.17.1 on x86_64
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